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sprnklersplashes · 5 years ago

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heart of stone (16/?)

AO3

Cady almost drowned once.

She was a kid, and thankfully her dad managed to save her before it got too far. Her parents were observing a nearby river and decided to take her with them. She had wandered off, her parents distracted by their work, and leaned too far over the side and she fell in. For a split second there was nothing and she remembers when she hit the water, the way the water rushed in and filled her lungs, her naïve attempts at breathing failing. She had tried to swim, or even just to move, but she was six, and all rational thought fled her mind and one word replaced it; “help”.

That’s how she feels now. She opens her mouth but nothing comes in or out. The phone is pressed against her ear, her fingers still and cold like a statue’s around it. It was late evening when Janis had called her, but now time has lost all meaning. It may well have been hours since she picked up the phone, she doesn’t know. All she knows is what Janis has just old her, and they’ve sat in silence as both their worlds crumbled around them, the amount of time is anyone’s guess.

Janis breaks the silent first, and there’s a stab of guilt in Cady’s chest when she does.

“Caddy?” Cady bawks a little at the sound, the nickname reserved only for Janis. “Caddy please say something.”

“I…” She wipes her face, her fingers coming away stained black with streaked mascara. “I’m sorry, Janis.”

“Oh… thanks.” Her heart breaks even more than it had when she hears Janis sniff, and that wasn’t something she had thought possible. “Yeah it um… it sucks, I guess.”

“It does.”

‘Sucks’ is too weak a word for this, but Cady can’t think of the right one either. Nothing works, and what might work sounds fake. As does everything she could and wants to say now. She can’t ask if she’s okay because it’s obvious she isn’t, nobody would be. She doesn’t want to ask for the details because it will either break one of them or both of them. And she doesn’t want to change the subject because only a complete and utter jerk would do that.

And she also really, really doesn’t want to hang up, or for her to hang up either.

At least they seem on the same page with that.

“So who else did you tell?” she asks finally. Her pillow is held close to her cold chest, her fingers toying with the fringe around it.

“Damian,” she sighs. Of course. “My parents were already there when I heard so that was a bullet dodged. I think they have to be here. Because you know, I’m a children. I need parental supervision apparently.” A fraction of a smile tugs on her lips and there’s a faint, faint warmth in her chest, present but barely making an impact against the cold. She’s still her Janis, no matter what. “And then I called you. I thought at least this time you should hear it from me.”

“Thanks.” It’s not that she holds it against her for not telling her the first time, not at all, she had her reasons and Cady can’t be sure she wouldn’t have done the same.

“And… Regina.”

“Regina?” That gets Cady up to attention, the shock so fierce it actually manages to distract her. Janis talked to Regina? Willingly? About this? She looks up and tries to see if she could find any flying pigs zooming past her window. “You told Regina?”

“Yeah,” she replies, her voice shaking. Then it all comes out, rushing like water through open floodgates. “I don’t know, I was scared and upset and I needed to talk to someone but I didn’t want to hurt you or Damian and… that happened.” Cady leans back on the bed, digesting the information piece by piece. On the other end, Janis pants heavily like she just ran a marathon and while reason says it’s from her confession, her anxiety starts to climb. “Are you mad?”

Is she?

“No,” she says. It’s the best answer. “I’m… a little confused. Surprised, maybe. But not mad.” She shrugs then. “You had your reasons.”

“You’re the best,” Janis sighs. As they fall silent again, Cady’s mind wanders and she imagines what Janis must be doing now, what must she look like. Sitting on her hospital bed probably, clad in her pyjamas and beanie, looking out at the black sky outside. It hurts her just picturing it and her arms ache with how empty they are. If she could be anywhere else, she’d be over there with her, wrapping her arms around her and pressing kiss after kiss to the back of her head.

“Hey, Caddy?” she whispers in a broken voice.

“Mm-hm?”

“You know when you… when you found out?” she asks. “And I said to you that if this gets too hard for you to handle that you can… That I need you to promise to walk away if this gets too much?”

She shakes her head.

“I don’t like where this is going-”

“It’s just that the next few months are probably going to be really hard on me. On us,” she cries. “And I know how much you have on your plate.”

“It’s not like the last two months were peachy either,” they remind her.

“That’s different,” she says. “We thought we had an endgame then and now…. Caddy I’m just saying that the offer still stands.” She swallows thickly. “That you can…. You can leave if you want. If this gets too hard.”

Cady lets out a long exhale, their fingers digging into the covers. Back then they had mentally crossed her fingers when she made that promise and that hasn’t changed now. If anything, her resolve has only grown. They don’t think she could even get the words out.

“And I’m just saying that I’m not leaving,” they say steadily. Tears sting at their eyes, their breaths coming out ragged. “If you’re in this then I’m in this Janis. To the end.”

Janis is quiet for a while after that, so quiet that Cady fears she may have hung up.

“Wow,” she croaks. “That was passionate.”

“Yeah, well,” they shrug, pushing their hair off their shoulder. “We Leos are like that.”

“So you believe astrology now?”

“I didn’t,” they say. “But Gretchen did this whole thing at lunch the other day and mapped out everyone’s birth charts. And I don’t know, I was kind of into it. Besides… it said that Leos and Scorpios are most compatible.”

“And who are we to argue with the stars themselves?” Janis asks, bemused. It feels good, both to hear her happy and to smile herself, if a little out of place.

Cady lays down on their side, face pressed into the pillow.

“So you believe me then?”

“I’d be a fool not to,” Janis says. “If you’re sure.”

“I am.” The words feel strong, stronger than anything she’s ever said before. She doesn’t think she’s ever meant something quite like she means this. “I am.”

“Okay. Okay.” She shifts on the other end, groaning and muttering something under her breath. “Caddy…. I-I appreciate this. Thank you, a lot. I mean it.”

“Thank me by getting better, okay?” they say. “Then you can take me on the big fancy three course dinner.”

“Given my bank balance it’ll be a Taco Bell,” she says. “But it’ll be the best damn Taco Bell you have ever had in your life.”

“That’s fine.” A fresh wave of tears runs down her face, her voice so tight it’s in danger of fading altogether. “Janis, I…”

“I know,” she whispers. “I know.”

She wipes her face again, her sweater hanging over her hands. The conversation’s run its course now, nothing left to say, but the idea of hanging up doesn’t feel right to her. She doesn’t know if it’s because of what she just told her, her need to be with her more because of it, or if it’s just plain old-fashioned missing her. What she does know is that thinking about saying goodbye hurts, a physical ache in her chest.

Luckily, Janis is on the same page as her.

“So what are you doing right now?” she asks. “Or… what were you doing, I guess?”

“Homework,” she sighs. She rolls onto her back and looks up at the ceiling. “Studying. The usual.”

“You know I never thought there would be a time where I actually missed math,” she sighs.

“Well how about on Friday I come over and teach you equations?”

“Ooh, you really know how to flirt don’t you, Heron?” she teases. “Romantic evening with you and some quadratic equations. Sounds like fun.”

“Oh I wouldn’t bore you with quadratics. I’d throw in some limits and functions too. I’m flexible.”

“I love when you talk nerd to me,” she mumbles and laughter lines her voice. Cady rolls onto their side, legs tucked up a little and despite everything that’s happened, a sort of golden warmth blossoms and spreads through her. She wishes she could somehow bottle this feeling and carry it around with her. Hold it close on the days when it feels far away. “How’s the tutoring going?”

“It’s going.”

“See normally when people say that they mean ‘it is going terribly’,” Janis tells her. “It’s what the waitress tells you during rush hour.”

“Fair enough,” she laughs. “But it is. It’s going good.” She hears a hum on the other end and then she somehow feels Janis smiling.

“Tell me about it.” It’s a soft request if there ever was one, and Cady sinks even further into the pillows.

And she tells her and answers her every question and laughs every snarky comment. She closes her tear-filled eyes, just to try something and when she does, it feels as though Janis is lying next to her, her face just inches from hers, her hand close enough to touch.

*****

She goes into school early the next day, when the sky is still dark-ish and the streetlamps are still on. Her breath forms in smoke in front of her face, dancing before her eyes. At some point last year, when she was still pre-Plastic, Janis blew in her face and played at being a dragon. She smiles at the memory, her cheeks warming as she does.

The janitor must have just turned on the heat when she comes in, her hair damp from the shower that just started as she was crossing the courtyard. She heaves a heavy sigh as she pulls it into a ponytail and heads towards her locker. Her schedule is pretty packed for today, her free periods used for tutoring and then a Mathletes meeting after school, so thankfully she had packed a substantial lunch for today.

Maybe she should have taken a snack bar too, she thinks as she judges the paper schedule taped to her locker door. Or at least an extra bottle of water.

“You’re crazy,” she mutters to herself. That’s what the water fountains are there for aren’t they? With her backpack balancing on her knee, she starts taking what she needs and putting them away again, knowing she won’t have time to get to her locker until lunch at the earliest. Her shoulder twinges as she puts it on and she gives it a rub. It’s fine, really. Nothing she can’t handle.

She throws the other strap on, closes the locker and turns to make her way to homeroom. She wasn’t so early that the school was deserted, but none of her crowd are here. A few freshmen wander around the halls, now adjusted to North Shore and even building their own little groups. Cady has to admit, it hurts her heart a little when she sees them sometimes; they look like reflections of her own peers last year. Not quite as fragmented yet, but the cliches are distinct even if people can move between them. Last week the walked past a girl with flowing hair, a powerful strut and two others following in her wake and she had to do a double take to make sure she wasn’t actually walking past Regina.

“Cady!”

“Woah!”

This time she actually was walking past Regina, nor more accurately nearly walking into her. She catches herself just in time and backs up, not out of fear, just out of courtesy, the way she’d treat anyone else.

“Sorry,” she breathes. “Wasn’t looking where I was going.”

“Do you ever?” she asks but there’s no cruelty in the words anymore. Cady laughs and adjusts her bag on her shoulder. Regina’s hair is tied back in a ponytail and a gym bag sits on her shoulder. Cady winces. “Early morning practice?”

Regina gags and sticks out her tongue, giving Cady all the answer she needs.

“Running around in the mud at 7am, great way to spend a day,” she moans. “It wasn’t too bad, really.” Cady raises in eyebrow, sceptical, and Regina huffs a laugh. “Why does the soccer team get the nice, warm gym and we’re made to practice outside.”

“It’ll benefit you in the long run,” Cady reasons. “You know, practicing in the elements. You watch, the soccer team won’t have that advantage and then they’ll screw up their first game.”

“I hope so,” she says firmly. “They deserve it for putting us through that. Walk with me to my locker so I can put this away?”

“Sure.”

“I also think it’s because we’re girls,” Regina goes on. “And Mr Duvall doesn’t want to give girls’ sports the same level of importance he gives boys’ sports.”

“Oh come on, Mr Duvall isn’t sexist,” she tells her.

“Maybe, but the sports department, I’m not so sure.” Cady snorts a laugh, but it’s only a seconds-long distraction from the tight feeling in her stomach. Despite the easy conversation with Regina, there’s something bubbling below the surface and she can’t be the only one who feels it. She definitely isn’t. And the more she tries to ignore it, the more it lingers. By the time they reach her locker, Cady feels it standing over them, breathing down both of their necks and she can’t ignore it any more.

“So… I heard you talked to Janis.”

It comes out like an accusation and Regina freezes at it. her mouth falls open and eyes remain forwards, trained on a spot in her locker.

Janis had asked if she was mad, and she wasn’t. At least she thinks she wasn’t. She doesn’t know what she’s feeling and it’s a not a good feeling when you don’t know anything, let alone your own feelings. Regardless of that, she just offers a casual shrug when Regina finally faces her.

“Um… yeah,” she says. “She just needed someone to talk to. Believe me I was as shocked as you are.”

“I’m not shocked,” she says. “That much.”

“It’s okay,” she tells her. “Really.” She closes the door and leans up against it, her jaw set. “Are you okay?”

She nods, the word ‘yes’ forming in her throat but not making it to her lips. Regina lets out a long breath and drums her fingers on her arm.

“It definitely sucks,” she says.

“Can’t argue with that.”

Regina opens her mouth a fraction, but before she can say whatever it is, her phone pings and with it, Cady’s heartbeat triples, quadruples, in less than a second. Without warning, every possible scenario flies through her head and the few seconds she takes to check drags out into hours, and Cady bites back a scream.

“It’s Karen,” she says. “She says um… flamingo emoji, bus emoji, book emoji, two girls holding hands.” She rolls her eyes fondly. “I can’t decipher any of this, can you?”

It’s only when she looks at her that Cady realises she hasn’t breathed yet. She nods and looks at the screen as she tries to remember how her lungs work.

“Um, well…. She uses the two girls holding hands emoji when she’s with Gretchen,” she mumbles. “And then she’s on the bus, probably doing homework.” She hands Regina back her phone. “Not sure what the flamingo means.”

“Okay…” Her voice trails off as she puts her phone back into her jacket, her gaze never leaving Cady. “Are you okay?”

“Fine.” She winces at the sound of her voice; how high it is. “Why wouldn’t I be?”

Regina doesn’t answer exactly, but the face she makes says ‘literally every reason under the sun’. Cady runs a hand through her hair and shakes it out.

“I’m fine,” she tells her. “Really. Just a little worked up.”

“Oh.” She straightens up and smiles, and for a second Cady sees a glimpse of the old Regina, only minus the malice. All the sweetness she feigned when they met seems real now, but her pull is as strong as ever. “Well, come on, I’ll walk you to your home room.”

Cady nods and lets Regina put her arm around her and talk whatever at her, her nerves calming but never disappearing for a moment, sparking under the surface of her skin all because of one text message that wasn’t even to her or from Janis. The floor she walks on feels like it’s made of glass, and she keeps her footsteps light so that it won’t break.

As they walk, she slips her hand into her jacket pocket and taps her phone, waiting to feel it buzzing On her very first day here, way back when, she had listened intently when Principal Duvall told her that phones were to be kept switched off for the school day and only meant to be used in an emergency. She took that seriously, so seriously that seeing Janis with her phone out at lunch nearly gave her a heart attack. She only began breaking that rule when she was full plastic and that was only to take silly pictures of herself or check her socials.

At least she’s breaking rules for a good reason this time around.

Her hand barely leaves her pocket all throughout the day. It’s either in it or sitting around it, tapping the back of her phone to make sure it hasn’t disappeared on her and she doesn’t-she can’t calm down all day, not even for a second. Not even when she gets to calculus, which is meant to be her safe haven. No amount of numbers in all their beautiful logic can calm the frantic humming of her mind, nor can it quell the incessant tapping of her pencil against the desk.

She mumbles an apology to her desk partner Jason before he goes and sees him rolling his eyes when he thinks he’s out of eyesight. She heaves her bag onto her shoulder and heads for the door with her books clutched against her chest, her hair falling forwards past her face. She’s just a foot away, maybe less, when she’s caught with a hand on her shoulder.

“Cady!” When she turns, Ms Norbury is standing behind her, wearing the same kind of warm, inviting smile she had the first day she met, the kind that makes Cady feel like she could collapse into her arms and tell her everything. “You got a minute kid?”

“Sure.” It’s lunchtime anyway so the room isn’t being used and her friends won’t mind her being a few minutes late. She follows Norbury and perches herself on the desk, her feet swinging slightly. Norbury raises an eyebrow, but she doesn’t react. Perks of being a Mathlete, Cady guesses.

“So… how are you doing?” she asks, leaning on her own desk. She doesn’t quite meet Cady’s eyes and the tension in her grip on the wood tells her everything she needs to know.

“You know, don’t you?” she asks. “About Janis.”

“Her parents like keeping the school updated,” she answers. “Keep us in the loop. It’s nice of them.” Cady hums and after hours of her trying to push it down, the lump in her throat only grows bigger and threatens to choke her. “And I know it’s hard on you.” Another hum and Cady wonders if she’ll actually be able to do full sentences today. Norbury cocks her head, biting her lips a little. “Cady? You okay?”

“Fine,” she says. She looks down at her clasped hands, only noticing for the first time how ragged and short her nails are. It must have been months since she last picked at them, but now the skin is red and raw and there’s barely room to put nail polish on them if she wanted to. She swallows thickly and allows a little more to creep out. “It’s hard, I guess.”

“You guess?” she asks. Cady almost smiles at that and pulls her cardigan tighter around her. “It’s okay, Cady.”

“Yeah.” She presses her palms together tightly, her shoulders squeezed tightly.

“And I’m sure you’ve been told this by just about everyone in this place,” she says. “But if you ever need anything… I’m here. If you need to talk or anything.” The image of her and Norbury having a heart to heart in the math supply cupboard flashes through Cady’s mind and while it’s funny, it’s not exactly far-fetched. After Janis and Damian, Norbury is probably the person she trusts most, and who knows her best. She may not have had every detail of last year, but she saw enough to piece it together. She was the one who got her out of it really. Showed her who she really is. “Or if you need to lessen your workload-”

“No.” She shakes her head so firmly and so quickly that her neck twinges. Norbury’s mouth falls open, a near-silent ‘oh’ escaping it. “I don’t need- I don’t want any kind of special treatment.” She shifts on the desk, pressing her hands together. “Thanks.”

“It’s not any kind of special treatment, Cady,” she tells her. “If you’re sure-”

“I am.” Her voice is so much stronger than she thought. And stronger than she feels. “Besides, I’m handling it. And it’s-it’s good isn’t it? All this work?” She shrugs. “Keeps my mind busy I guess.” Norbury nods, an understanding smile on her face.

“Well, if there’s anything you ever want to talk about, I’m here.”

“I appreciate it, Ms Norbury. Really.” She feels there should be a hug here, hell, she sort of wants there to be a hug here, but they’re both still in school and school rules still apply. So for now, the soft smiles they give each other are enough.

“Okay you run along now,” she says, making a shooing motion with her hand as she does so. “Don’t want to hold you back from your lunch.”

She huffs a laugh at that and readies herself to go, but when she looks at the door, all she feels is this sinking feeling in her chest. Suddenly the hallway isn’t made of linoleum tiles but of quicksand and walking to the cafeteria won’t kill her, but it may take a lot out of her. In here she feels the safest she has all day, away from people’s prying eyes even if they are well-meaning. She could go and eat in the bathroom, but bathrooms are breeding grounds for gossip and she’s not that pathetic, not any more.

“Ms Norbury?”

“Mm-hm?”

“Can I…. can I eat in here?” She doesn’t know if eating lunch in her math classroom with your teacher is better or worse than eating in a bathroom stall, but she’s willing to try. Her head snaps up, her eyes wide behind her glasses. “I mean, it’s fine if you can’t, you’re probably busy.”

But her face breaks out into a smile, and she puts her lunchbox on the desk and nods.

“Of course you can hon,” she says. “And as it would happen, I was just about to whack on a podcast. You ever listened to Mathematically Speaking?” Cady shakes her head. “Oh you are in for a treat. Come on, I’ll put the volume up. Don’t just sit there, get out your food!”

Cady grins and takes out her own lunch before sending Damian a quick text about a lunchtime study group. Odds are he’ll figure out that it isn’t true sooner or later, but odds are also that he’ll understand. She crosses her legs on the table and leans on her elbows as Ms Norbury explains everything about the podcast and her failed attempts to get the rest of the math teachers into it. It may be considered geeky, to spend lunchtime sitting listening to people talk about math, but Cady loves it all the same, and more importantly, she can breathe with relative ease throughout it and she only worries when she door opens for two seconds, only for it to be another teacher asking to borrow textbooks. The best part is that she can have her phone sitting in her lap, in full view, and Norbury doesn’t even question it.

At the end of the day she’s almost tempted to skip the Mathlete meeting. Despite her brief reprise at lunch, the whole day had sucked all the energy out of her, leaving her feeling like a shadow by her last class. Not just feeling, when she went to the bathroom she saw the dark smudges beneath her eyes, the paleness of her skin and the mess that is her hair. Even if it’s nothing a bit of borrowed make up can’t fix, it still shocks her quite a bit. Maybe she could fake sick and get out of it. Maybe she wouldn’t need to fake it, she thinks.

But the idea is tossed aside quickly, so much so that she nearly scowls at herself in the mirror. The Mathletes needed a leader after Kevin G graduated and she’s taken up that position. Besides if Kevin knew that she was even thinking about ditching he’d be mortified. Betrayed more than any human being has been betrayed and he would certainly tell her as much. Probably with a Star Wars analogy.

So after a moment spent alone in the bathroom, Cady lifts up their chin, reapplies their make-up and heads off to the classroom, powering through the halls as heads turn in their direction. Like everything that happens here, news about Janis must have spread by now. Someone says something to someone, who says it to another someone, who says it to another someone. And on and on it goes until everyone knows, even the people who never knew her. But they know she’s Cady’s girlfriend and the weight of the pitying looks propels them faster down the hall until they practically stumbles through the door.

“Hey Africa,” Tyler greets from where he sits on the desk, his legs crossed. The nickname has stuck eve if they’re far from ‘the new kid’. It feels nice, strangely, although they’d hate it coming from anyone else. It keeps her connected to her roots. “What’s on the agenda for today?”

“Right,” she sighs. “Today’s agenda.” They shake their head and would slap themselves if they were alone. This isn’t time for emotional Cady, or distracted Cady. This is time for Mathlete Captain Cady, the Cady who has everything organised down to the bathroom schedule and who walks into team meetings with a smile and a bounce. That’s the Cady they chose to be their captain, and she took on that mantle with pride. The only issue is that Captain Cady seems to be having trouble coming to the front right now. “Um… so last week we looked at strategies for our next contest. And we started going back over trig.” They let out a breath, their hands steadying. Maybe this will be easier than they thought. “And at least we’ve gotten past qualifiers now.”

“Yeah but that was the easy part,” a girl speaks up, an AP Calc girl whose name Cady should know. Something beginning with a J, they think, but the rest is blank.

“Yes thank you for that,” they mumble. Heat prickles at their back and they shift from one foot to the other, their chest suddenly tight. Maybe it’s the running they did to get here. “Um… can we open a window here?”

“A window, it’s freezing.”

“Okay, strike that then,” they mumble. They take out their planner and flip through it, the paper slipping through their sweaty fingers until they find the right page. “Okay so for today I thought we’d move on to statistics. I know a lot of us have that down, but we can’t afford to slip up on it, especially since, as we saw on the videos last week, that tends to be the area most teams ignore.” They smile and wipe their hand on their jeans. “Sound good?”

“You’re the boss,” Tyler says, and they’re almost put at ease by it.

“Okay, so I got out these packs and, oh shuck!” They slap their palm to their head in an almost comedic fashion. “I’m so sorry guys, I completely forgot.”

“Forgot what?”

“The packs,” they groan. “I downloaded these amazing packs from the Internet, made by this guy who was the captain of his school’s winning mathlete team, and I printed them out, I-I think I printed them out, and they’re either in my room or in my locker.” They try to rack their brain, but their head feels far too warm and everything is disorganised; a jumbled, incoherent mess that they can’t even hope to sift through. In their mind’s eye they see a half-formed picture of them putting them in their locker, but they can’t work out if it’s real or just wishful thinking. “I-I know I printed them but I can’t remember where I put them.” They run their hand through their hair two, three times and when they blink, there’s the unmistakable feeling of tears in their eyes.

Oh God, they can’t be crying. Not over this.

“Hey, Cady,” Tyler says softly. He’s risen from his seat, his hand extended towards her. “It’s okay. Really. I mean our next contest isn’t until when?”

“When?” they echo. “Oh, oh God, um…” They flip through the planner again, through pages of carefully glitter pen. “Oh, it’s not for another three weeks.”

“See, so we’re good,” he says. They nod and try to take a deep breath, giving Tyler a grateful nod. “Okay, so for this week, I say we start going over statistics. Start from the basics and work our way up. We all have our textbooks right?” The room nods at her, but it doesn’t do anything for them. They wish more than anything they could collapse into one of those chairs and bury their head in numbers, to let someone else take the reins for once, but unfortunately, that’s not in the cards for the captain. Instead they take out a whiteboard pen and open the textbook, swallow the lump in their throat, and get to work.

Ms Norbury slips in a bit later, coffee in hand and mumbling an apology about a staff meeting having ran late. By that time they’re already half way through the chapter and Cady has managed to keep the fact that they’re completely falling apart mostly under wraps. For once they’re thankful that so few people join Mathletes. They’re not so sure how they’d fare in front of a bigger crowd than this.

They call for a break not long after, the rest of the room leaning back in their chairs and exhaling loudly, heads dangling backwards. They all love Mathletes, but as they days get shorter and school piles up, they take all the breaks they can get. Cady tries to follow her peers’ leads, to let their shoulders drop or to even exhale, but their body won’t obey. They feel like a wound-up toy, just one turn of a key away from snapping and falling apart.

“Cady?” Ms Norbury appears at their side, hand on their shoulder and concern in her eyes. “You doing okay?”

“Fine,” they say. They push their hair out of their face, wincing at their fingers catch on the knots. “Fine. I um….” They try to breathe, but they feel like someone is pushing down on their chest and as they look around, the room seems to shrink. “Uh… I’m going to go check my locker. I think there’s some- you weren’t here but I said I printed out some stuff and I might have left it in there. So I’ll-I’ll go check.”

The hallways aren’t much better- the walls far too close no matter where they stand and the ceiling pressing down over their head. At least they’re alone, no other people to push past or questions to avoid.

They pull to a stop beside their locker, their clammy hand on their chest, finding their heartbeat frantic below their shirt. A small, pained whimper escapes them and a metallic taste hangs around in their mouth. They lean against the locker and inhale and exhale until they feel some degree of normal. Maybe they should have skipped Mathletes today, regardless of what Kevin would have said.

Slowly, they reach into their back pocket and pull out their phone, the screen cold and soothing to their warm skin. When the screen lights up, the one thing they find is an email from a magazine they subscribe to. No messages, not even when they go through every social media they have to double check.

Trembling slightly, they hold the phone against their chest. No news is sometimes good news-that’s what their mom likes to say. Lately it often feels like any news is bad news, at least on the Janis front. And they’re just waiting from update to update with a growing feeling of dread. They don’t know if and when something will happen, if tomorrow morning they’ll wake up and find that she’s either better or worse, if this ends or it goes on. And it’s exhausting, all this waiting. Especially since if something does happen, they probably won’t be the first to know.

“Cady?” They nearly jump into the ceiling at the sound of their name. When they look up it’s not Ms Norbury they find but Tyler, wringing his hands awkwardly. Their name almost sounds unfamiliar in his voice, having been called ‘Africa’ so many times. Tyler holds up his hands awkwardly, either in surrender or defence. “Sorry, didn’t mean to scare you.”

“You didn’t,” they say. They turn around and fiddle with the locker combination, their fingers slipping and fumbling around it. “I was just-”

“Yeah, yeah I know,” he says. “Um… look Cady, some of us where talking.” The hair on the back of her neck pricks up at that and her fingers freeze. “We know you’re under a lot of pressure right now. I mean, we all are but…. I think you’re going through more than the rest of us.” They hum, trying to sound as casual as possible, but in reality their knees are shaking. “And you know… if you wanted to maybe step down or take up a co-captain… that’d be fine.”

“No.” Their voice is surprisingly strong given how weak they feel. They turn around to face Tyler, their hair swinging behind them, and their hands curl into fists. “Look Tyler I know you mean well… but I’m not stepping down.”

“Hey, it’s not like that,” he tells them. “You’re definitely one of the best captains we’ve ever had. I mean you’ve got us so much further already. Kevin picked a good one.” He smiles at them then, and Cady can’t help but smile back, even if it’s muted. “I’m just saying that I know you’re going through a lot with Janis right now. Maybe taking some stuff off your plate might help you out.” He shrugs. “We just want you to be okay. We’re not kicking you off the team, Africa. We’d be idiots to do that.”

Cady bites the inside of their cheek, the tension slowly releasing from their hands. Tyler isn’t not like some others in this school, he might be a bit of a Dude sometimes, but he’s sweet and he’s honest, even if it’s brutally, and most of all he cares about them, about everyone. He looks out for people. He doesn’t talk down to people, not intentionally.

And he might have a point.

Kind of.

“Thank you,” they say eventually. “But… no. I’m fine. I’ve got this. I’m just…. Adjusting.” They cross their arms over their chest. “It’s been a rough day.”

“Yeah… I heard,” he says, his voice small. Cady nods. They don’t ask how, they’re pretty sure they don’t want to know. “But… if you’re sure you’ve got this.”

“I am. Besides,” they grin. “You losers wouldn’t last a week without me.”

“Oh that’s for sure.” A giggle passes between them and Cady turns around and opens their locker. As luck would have it, they find the folder sitting on the shelf and pull it out, waving it in front of Tyler.

“See? Nothing to worry about.” They close the door and slide up to him, the folder held against their chest. “Just a little wobble. But I’m fine, really.”

“Aye, aye captain,” he says.

“But I appreciate the offer,” they tell him. “Now come on, we should get back before people start thinking that we’re off making out somewhere.”

“I don’t think anyone would do that,” he says, offering his arm. They take it, chuckling, and the two set off down the hall. “They know you’re with Janis. And that I am a confirmed bachelor, single by choice.”

“Yeah, everyone else’s choice,” they tease, but it’s good natured and Tyler laughs at it, and agrees. Secretly, Cady is glad he offered his arm, not just because it lightens the mood, but because they’re not sure they could make it down to the classroom on their own.

“Hey… you know that we’re all here for you, right?” he asks. “Me, the rest of the crew. We’ve all got your back. You’re one of us, Africa.”

“I’d like to think so. Otherwise the jacket was a huge waste of a purchase,” they respond. Then they rest their cheek on Tyler’s shoulder and sniffles. Tyler, of course, he doesn’t judge. “Thank you.”

It’s dark enough when they get home, winter has dug its claws in tightly, and the rain from this morning has made a reappearance. Their mom greets them with a hug and a pat on the head and tells them dinner won’t be long. They grin and thank her but ask if they can have it in their room.

“Just got a lot of work to do,” they say. In reality, they hardly touch the plate, and sneak it down an hour later mostly full. They didn’t lie, they do have a lot of work to do, deadlines closer than they’d like, but they find themselves unable to so much as pick up a pencil, instead sitting on their bed and staring at the wall, their eyes heavy and their soul heavier. Their phone sits in their lap and they sit on edge, waiting for it to vibrate or light up and give them something, anything. It stays silent and they finally give up.

They climb into bed earlier than usual, and sleep comes almost as soon as they close their eyes.

#mean girls musical #mean girls broadway #cadnis #cadnis ff #cady x janis #cady heron #janis sarkisian #mean girls #mean girls fanfic #fic: heart of stone

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jacob-cs · 2 years ago

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RADIX scrypto 1

Accounts on the Radix network are actually Scrypto components that hold resource containers and define rules for accessing them.

You can instantiate a new account component in the simulator with the resim new-account

This will give you back the created account’s address, public key and private key.

Additionally, at any time, you can find the current default account with the command resim show-configs.

You can send tokens from the default account to another one by running the command:

resim transfer [amount] [resource_address] [recipient_address]

Let’s verify the balance of the second account. You can query the state of an address with the resim show [address] command.

resim show resource_sim1qyqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqs6d89k

to easily create a boilerplate Scrypto package with basic functionality. To do this, simply type the following command scrypto new-package [package_name].

Directory Structure

At the root of the generated package directory, you should find the src, and tests folders plus a Cargo.toml file.

The tests folder is where you write the integration tests for your package. You can run the tests located in this directory with the scrypto test command.

All packages must have a lib.rs file - which is the starting point of your Scrypto package.

You can think of blueprints and components like classes and objects in object-oriented programming.

When you create a new project with the scrypto new-package command, it creates a Scrypto package. A simple package, like the HelloToken example, will only contain a single blueprint but you could “package” together multiple blueprints that need each-other to work when deploying them on the ledger. That way, you are certain that all your blueprints are deployed at the same time and the platform knows that those blueprints are related to each other.

(즉 하나의 팩키지에 여러개의 블루프린트가 있을수있으며 하나의 팩키지안의 여러 블루프린트는 서로 연관되어있다고 여겨진다)

#[blueprint]. A blueprint definition must contain a struct and an impl section with the name of the blueprint

impl 블락 안에

you will write the functions callable on the blueprint itself and the methods callable on the instantiated components.

It’s important to make a distinction between functions and methods:

Functions can be called on the blueprints and do not have access to any state.

Methods on the other hand are callable on individual components and are able to get data from the state and update or mutate it.

위는 function 의 한 예시

위는 method의 한 예시

&mut self가 전달되면 메소드 가 된다

Safe Types

These types are just like the u8, i8, u16, etc. but they differ in the fact that they panic (and make the transaction fail) if an overflow occurs when doing operations on them. You define these types by using an uppercase U for unsigned numbers and uppercase I for signed numbers:

I8, I16, I32, I64, I128, I256, I384, I512

U8, U16, U32, U64, U128, U256, U384, U512

They also have the benefit of offering 384 bits and 512 bits options instead of a maximum of 128 bits.

Strings

The String type is supported in Scrypto.

Floating points

the Rust types f32 and f64 representing floating point numbers are not supported in Scrypto. Instead, we offer the Decimal and PreciseDecimal types that allow you to represent numbers with a fractional part using fixed point arithmetic (which is deterministic).

you have to wrap the number in quotes (as seen for c and e in the previous example). If you don’t, you will not be able to compile your package because it will detect the use of floating point numbers.

The Decimal type supports a maximum of 18 decimal places -if you need more you should use PreciseDecimal which supports up to 64 decimal places:

Collections

Scrypto supports the basic Rust collections like Vec, HashMap and HashSet. We also provide a new type KeyValueStore which is like a HashMap, but it does not load the full content of the Map until you request it. Here are some examples:

Scrypto Types

The PackageAddress, ComponentAddress and ResourceAddress types are used to work with the different address types. The Scrypto types you will work with the most are the Bucket and Vault types

Creating Custom Types

You create a custom type by writing a struct outside of the blueprint! definition. It is important to remember to add the line #[scrypto(ScryptoCategorize, ScryptoEncode, ScryptoDecode, LegacyDescribe)] before the struct block. This adds, at compile time, methods to the type to make it compatible with the Radix Engine. Here is an example:

To test our blueprint locally we will use resim. You may recall we saw how to use resim to create accounts and transfer tokens in the simulator. By running the resim --help command you will see that you can do much more with resim. In our case, we will use it to publish our package to the local simulator, instantiate our component, and call a method to interact with it.

To ensure we have a clean slate to begin with let’s run resim reset and then generate a new default account by running resim new-account be sure to save the account address as we will want to inspect it later. You can save this as an environment variable for convenience or just create a file for your own reference to copy and paste.

The next step is to build and deploy the package. You can do that with the following command: resim publish . (make sure you are in the hello_token directory!).

To create an instance of our deployed blueprint we will use the package address that we just received to instantiate our component by calling the instantiate_hello function on the Hello blueprint by running

resim call-function [package_address] [blueprint_name] [function]

which will look something like this:

resim call-function package_sim1qxxkyjgkyryztmtlsypzd8244xkvqeln32aqdersgk3szcwxzq Hello instantiate_hello

After running the call-function command above, you will get various information about the transaction that was executed.

Now that we have an instantiated Hello component, all the methods defined by its blueprint are exposed to us and callable. We are going to call the free_token method on it with a resim command resim call-method [component_address] [method]

token도 resource 중의 한가지 이다

Resources are built into the platform

Resources on Radix need to always be placed in some kind of resource containers. Resource containers, as the name suggest, hold resources. Each resource container can only hold one type of resource and the purpose of these resource containers are to properly move, secure, and account for the resources that are being transacted. There are two types of resource containers: Bucket and Vault.

Bucket - Buckets are temporary containers and are used to move resources during a transaction; therefore, only exist in the duration of the transaction.

Vault - Vaults are permanent containers and at the end of each transaction, all resources must be stored in a Vault.

Scrypto offers a handful of utilities to conveniently create and manage resources.

ResourceBuilder - The ResourceBuilder is used to create Fungible and NonFungible resources.

ResourceManager - When a resource is created, a ResourceManager is also created to manage the resource.

The ResourceBuilder is a Scrypto utility that we use to create Fungible and NonFungible resources. Below is a table summarizing the methods provided by the ResourceBuilder for Fungible resources.

Notice that we have fields such as color and rarity. These values are a selection of enums and if you're not familiar with enums, the Rust handbook provides a section on enums.

Creating a NonFungible Resource

Creating a NonFungible resource is a little different from creating a Fungible resource as we saw in the earlier section. To give some context, when we create a NonFungible resource, the collection of the NonFungible resource will have one ResourceAddress. However, each individual NonFungible that we decide to mint will have its own unique identifiers called NonFungibleLocalId. We have an option of data types we can declare to be our NonFungibleLocalId, but it is a requirement to declare a type.

아래는 integer를 id 로 사용하는 경우이다

Creating NFTs with a Mutable Supply

You can create NFTs with no specified initial supply. To do so, we would need to create a badge that will be held by the component Vault.

Viewing, Utilizing, and Mutating NonFungibleData

full example code

#RADIX #XRD #scrypto

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geoffreyret-blog · 6 years ago

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kabargames · 5 years ago

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Mohur, Mho, Ohm Level 95 Shuts, Huts, Shut, Thus, Hut Bonus Tush Level 96 Loser, Roles, Lore, Lose, Role, Rose, Sole, Sore, Ore Bonus Lores, Orles, Sorel, Oles, Ores, Orle, Roes, Sloe, Ers, Ole, Res, Roe, Sel, Ser, Sol Level 97 Fungi, Fin, Fun, Gin, Gun Bonus Fig, Fug, Gnu Level 98 Wally, Ally, Wall, All, Law, Lay, Way Bonus Yawl, Awl, Yaw Level 99 Farms, Arms, Farm, Mars, Arm, Far, Mar Bonus Arfs, Rams, Ram Level 100 Aware, Area, Wear, Are, Awe, Ear, Era, Raw, War Bonus Ware, Awa, Wae Daftar Kunci Jawaban Word Across Level 101 – 120 Level 101 Ghost, Hogs, Host, Shot, Hog, Hot, Got Bonus Goths, Gosh, Goth, Hots, Shog, Togs, Tosh, Sot, Tho, Tog Level 102 Tells, Lest, Lets, Sell, Tell, Let, Set Bonus Ells, Tels, Sel Level 103 Mound, Undo, Don, Duo, Nod, Mud Bonus Muon, Udon, Dun, Mod, Mon, Oud Level 104 Theme, Meet, Them, Hem, The, Met Bonus Heme, Mete, Meth, Teem, Thee, Eme, Tee Level 105 World, Lord, Word, Low, Old, Owl, Rod, Row Bonus Wold, Dol, Dor, Dow Level 106 Firms, Firm, Rims, Fir, Rim, Sir Bonus Firs, Mirs, Rifs, Mir, Rif, Sri Level 107 Rapid, Arid, Drip, Paid, Pair, Raid, Aid, Air, Pad, Par, Rap, Rid, Rip, Dip Bonus Pardi, Pard, Dap, Pia, Rad, Rai, Ria Level 108 Hatch, Chat, Act, Cat, Hat Bonus Hath, Tach Level 109 Plump, Lump, Plum, Pulp, Pump, Pup Bonus Pul, Ump Level 110 Knees, Keen, Knee, Seek, Seen, Ken, See Bonus Keens, Skene, Ekes, Esne, Kens, Sene, Skee, Eke, Ens, Nee Level 111 Width, With, Hid, Hit, Wit Bonus Whid, Whit, Dit Level 112 Blast, Bats, Last, Salt, Slab, Tabs, Bat, Lab, Tab, Stab Bonus Blats, Albs, Alts, Bals, Bast, Blat, Labs, Lats, Slat, Abs, Alb, Alt, Bal, Lat, Sab, Sal, Sat Level 113 Peace, Cape, PaCepe, Cep, Pac, Pea Level 114 Shake, Sake, Ash, Ask, Has, Sea, She Bonus Hakes, Haes, Hake, Kaes, Keas, Shea, Hae, Kas, Kea, Ska Level 115 Plots, Lost, Lots, Plot, Post, Pots, Slot, Spot, Stop, Tops, Lot, Opt, Pot, Top Bonus Lops, Opts, Pols, Slop, Lop, Pol, Sol, Sop, Sot Level 116 Burly, Blur, Bury, Ruby, Buy, Rub Bonus Burl, Bur Level 117 Blush, Bush, Lush, Bus, Hub, Sub Bonus Buhls, Buhl, Hubs, Shul, Slub Level 118 Spend, Ends, Pens, Send, Sped, Den, End, Pen Bonus Pends, Dens, Peds, Pend, Sned, Eds, Ens, Ped, Pes Level 119 Grand, Darn, Drag, Grad, Rand, Rang, And, Ran Bonus Dang, Gnar, Gran, Nard, Dag, Gad, Gan, Gar, Nag, Rad, Rag Level 120 Chips, Chip, Ship, His, Sic, Sip Bonus Chis, Hips, Ichs, Phis, Pics, Pish, Hip, Ich, Pic Kunci Jawaban Word Across Level 121 – 140 Level 121 Cones, Cone, Nose, Once, Ones, One, Sec, Son Bonus Scone, Cons, Eons, Noes, Sone, Con, Ens, Eon Level 122 Saint, Satin, Stain, Anti, Ant, Its, Sin, Sit, Tan, Tin Bonus Antis, Tains, Ains, Aits, Anis, Ants, Nits, Sain, Sati, Snit, Tain, Tans, Tins, Ain, Ait, Ani, Nit, Sat, Tis Level 123 Hazel, Hale, Haze, Heal, Zeal, Ale Bonus Laze, Hae, Lea Level 124 Count, Unto, Cot, Cut, Not, Nut, Out, Ton Bonus Unco, Con, Tun Level 125 Coupe, Cope, Coup, Cop, Cue, Cup Bonus Puce, Cep, Ope Level 126 Budge, Bed, Beg, Bud, Bug, Due, Dug Bonus Debug, Gude, Deb, Dub, Ged Level 127 Taxed, Date, Ate, Axe, Eat, Tad, Tax, Tea Bonus Axed, Tae, Ted Level 128 Bring, Grin, Ring, Big, Bin, Gin, Rib, Rig Bonus Brig, Girn, Gib, Nib Level 129 Aptly, Play, Apt, Lay, Pal, Pat, Pay, Tap, Lap Bonus Platy, Typal, Paly, Paty, Plat, Alp, Alt, Lat, Ply, Pya, Yap Level 130 Genus, Guns, Snug, Sung, Gun, Sue, Sun, Use Bonus Negus, Engs, Gens, Genu, Gnus, Negs, Ens, Gen, Gnu, Neg Level 131 Dared, Dread, Dare, Dead, Dear, Read, Add, Are, Dad, Ear, Era, Red Bonus Adder, Readd, Redd, Rad Level 132 Crawl, Claw, Arc, Car, Law, Raw, War Bonus Carl, Craw, Awl, Caw, Lac, Lar Level 133 Tents, Nest, Nets, Sent, Tent, Test, Net, Set, Ten Bonus Netts, Stent, Nett, Sett, Stet, Tens, Tets, Ens Level 134 Found, Fond, Fund, Undo, Don, Duo, Fun, Nod Bonus Fondu, Udon, Dun, Fon, Fou, Fud, Oud Level 135 Thyme, Myth, Them, They, Hem, Met, The, Yet Bonus Hyte, Meth, Thy Level 136 Clown, Cow, Low, Now, Owl, Own, Won Bonus Cowl, Lown, Col, Con Level 137 Minor, Iron, Norm, Ion, Nor, Rim Bonus Inro, Morn, Noir, Mir, Mon, Nim Level 138 Yacht, Chat, Act, Cat, Hat, Hay Bonus Achy, Chay, Tach, Cay, Thy, Yah Level 139 Abyss, Bass, Bays, Says, Bay, Say Bonus Bassy, Abys, Sabs, Abs, Aby, Ays, Sab Level 140 Knife, Fine, Fin, Ink, Ken, Kin Bonus Fink, Kief, Kine, Fen, Kef, Kif Kunci Jawaban Word Across Level 141 – 160 Level 141 Gamut, Gum, Gut, Mat, Mug, Tag, Tug Bonus Gaum, Gam, Gat, Mag, Mut, Uta Level 142 Drift, Dirt, Rift, Fir, Fit, Rid Bonus Frit, Dif, Dit, Fid, Rif Level 143 Short, Host, Shot, Sort, Hot, Rot Bonus Horst, Hots, Orts, Rhos, Rots, Thro, Tors, Tosh, Ort, Sot, Tho, Tor Level 144 Paced, Cape, Pace, Ace, Ape, Cap, Pad Bonus Caped, Aced, Aped, Cade, Dace, Cep, Dap, Pac, Pea, Ped Level 145 Asked, Desk, Sake, Ask, Sad, Sea Bonus Daks, Kaes, Keas, Sade, Ads, Dak, Eds, Kas, Kea, Ska Level 146 Sheen, Hens, Seen, Hen, See, She Bonus Esne, Sene, Ens, Nee Level 147 Awash, Wash, Ash, Has, Saw, Was Bonus Haws, Shaw, Shwa, Awa, Haw Level 148 Brush, Shrub, Bush, Rubs, Rush, Bus, Hub, Rub, Sub Bonus Buhrs, Buhr, Burs, Hubs, Urbs, Bur Level 149 Lends, Ends, Lend, Lens, Send, Sled, Den, End, Led Bonus Dels, Dens, Elds, Sned, Del, Eds, Eld, Ens, Sel Level 150 Waved, Wade, Wave, Awe, Dew, Wad, Wed Bonus Awed, Deva, Daw, Wae Level 151 Picks, Pick, Sick, Skip, Sic, Sip, Ski Bonus Kips, Pics, Spik, Kip, Pic Level 152 Opens, Nope, Nose, Ones, Open, Pens, Pose, One, Pen, Son Bonus Peons, Pones, Eons, Epos, Noes, Opes, Peon, Peso, Pone, Pons, Sone, Ens, Eon, Ope, Pes, Sop Level 153 Twins, Twin, Wins, Its, Sin, Sit, Tin, Win, Wit Bonus Nits, Snit, Tins, Wist, Wits, Nit, Tis, Wis Level 154 Glaze, Gale, Gaze, Zeal, Age, Ale, Gal, Gel, Lag, Leg Bonus Egal, Laze, Lea, Zag Level 155 Mores, More, Rose, Some, Sore, Ore Bonus Morse, Omers, Mors, Omer, Ores, Rems, Roes, Roms, Ers, Rem, Res, Roe, Ser, Som Level 156 Pouch, Chop, Coup, Ouch, Cop, Cup, Hop Level 157 Snaps, Spans, Pans, Pass, Snap, Span, Nap, Pan, Sap, Spa Bonus Asps, Naps, Sans, Saps, Spas, Asp, Pas Level 158 Tonal, Alto, Loan, Ant, Lot, Not, Tan, Ton Bonus Notal, Talon, Tolan, Lota, Nota, Tola, Alt, Lat, Oat Level 159 Begin, Being, Binge, Beg, Big, Bin, Gin Bonus Bine, Gibe, Ben, Gen, Gib, Gie, Neb, Neg, Nib Level 160 Flats, Fast, Flat, Last, Salt, Aft, Fat Bonus Alts, Fats, Lats, Slat, Alt, Lat, Sal, Sat Kunci Jawaban Word Across Level 161 – 180 Level 161 Puree, Peer, Pure, Per, Rep, Rue Bonus Rupee, Pere, Pree, Ere, Ree Level 162 Amber, Bare, Beam, Bear, Mare, Are, Arm, Bar, Bra, Ear, Era, Mar Bonus Bream, Embar, Barm, Bema, Berm, Brae, Ream, Arb, Bam, Mae, Ram, Reb, Rem Level 163 Fumes, Fuse, Muse, Sue, Use, Sum Bonus Emus, Fems, Feus, Fume, Emu, Fem, Feu Level 164 Belts, Belt, Best, Bets, Lest, Lets, Let, Set, Bet Bonus Blest, Bels, Tels, Bel, Bes, Sel Level 165 Dough, Dog, Dug, Duo, God, Hog, Hug Bonus Hod, Oud Level 166 Deity, Diet, Edit, Tide, Tidy, Tied, Die, Dye, Tie, Yet Bonus Dite, Yeti, Dey, Dit, Ted Level 167 Crowd, Cord, Crow, Word, Cod, Cow, Rod, Row Bonus Cor, Doc, Dor, Dow, Orc, Roc Level 168 Muted, Duet, Mute, Due, Met, Mud Bonus Emu, Med, Mut, Ted, Ute Level 169 Batch, Bath, Chat, Act, Bat, Cab, Cat, Hat, Tab Bonus Bach, Baht, Tach Level 170 Crime, Mice, Rice, Ice, Ire, Rim Bonus Cire, Emic, Emir, Merc, Mire, Rime, Mic, Mir, Rec, Rem Level 171 Libel, Bell, Bile, Bill, Ill, Lie Bonus Bel, Lei, Lib Level 172 Admit, Amid, Maid, Aid, Aim, Dam, Dim, Mad, Mat, Mid, Tad Bonus Adit, Ait, Ami, Dit Level 173 Drink, Kind, Rind, Rink, Din, Kid, Kin, Rid, Ink Bonus Dink, Dirk, Kirn, Irk, Kir Level 174 Youth, Hot, Hut, Out, Toy, You Bonus Thou, Hoy, Tho, Thy Level 175 Ports, Sport, Port, Post, Pots, Sort, Spot, Stop, Tops, Opt, Pot, Pro, Rot, Top Bonus Prost, Strop, Opts, Orts, Pros, Rots, Tors, Trop, Ort, Sop, Sot, Tor Level 176 Snake, Sneak, Sake, Sane, Sank, Ask, Ken, Sea Bonus Kanes, Skean, Anes, Kaes, Kane, Keas, Kens, Ane, Ens, Kas, Kea, Nae, Ska Level 177 Tenth, Tent, Then, Hen, Net, Ten, The Bonus Hent, Nett, Teth, Nth Level 178 Shady, Dash, Days, Hays, Ash, Day, Had, Hay, Sad, Say, Shy, Has Bonus Dashy, Ashy, Dahs, Shad, Shay, Ads, Ays, Dah, Yah Level 179 Champ, Camp, Chap, Cap, Ham, Map Bonus Caph, Cham, Mach, Amp, Cam, Hap, Mac, Pac, Pam Level 180 Dense, Needs, Ends, Need, Seed, Seen, Send, Den, End, See Bonus Denes, Dees, Dene, Dens, Esne, Sene, Sned, Eds, Ens, Nee Kunci Jawaban Word Across Level 181 – 200 Level 181 Spike, Pies, Pike, Skip, Pie, Sip, Ski Bonus Kepis, Pikes, Kepi, Keps, Kips, Sike, Sipe, Skep, Spik, Kep, Kip, Pes, Sei Level 182 Canoe, Ocean, Cane, Cone, Once, Ace, Can, One Bonus Acne, Aeon, Ane, Con, Eon, Nae, Oca Level 183 Drawn, Darn, Dawn, Draw, Rand, Wand, Ward, Warn, And, Ran, Raw, Wad, Wan, War Bonus Nard, Awn, Daw, Rad Level 184 Ninth, Hint, Thin, Hit, Inn, Tin Bonus Hin, Nit, Nth Level 185 Stirs, Sits, Stir, Its, Sir, Sit Bonus Sirs, Sris, Sis, Sri, Tis Level 186 Apple, Leap, Pale, Plea, Ale, Ape, Lap, Pal, Pep Bonus Appel, Palp, Peal, Alp, App, Lea, Pap, Pea Level 187 Scrub, Curb, Rubs, Bus, Cub, Rub, Sub Bonus Curbs, Burs, Crus, Cubs, Curs, Urbs, Bur, Cru, Cur Level 188 Pasta, Past, Pats, Taps, Apt, Pat, Sap, Spa, Tap Bonus Tapas, Spat, Tapa, Asp, Pas, Sat Level 189 Helms, Helm, Mesh, Elm, Hem, She Bonus Elms, Hems, Mels, Mel, Sel Level 190 Owing, Gown, Wing, Gin, Ion, Now, Own, Wig, Win, Won Bonus Wino, Nog Level 191 Aloft, Float, Alto, Flat, Loaf, Loft, Aft, Fat, Lot Bonus Foal, Lota, Tola, Alt, Lat, Oat, Oft Level 192 Cruel, Ulcer, Clue, Cure, Curl, Lure, Rule, Cue, Rue Bonus Lucre, Ecru, Luce, Cel, Cru, Cur, Leu, Rec Level 193 Zebra, Bare, Bear, Are, Bar, Bra, Ear, Era Bonus Braze, Brae, Raze, Arb, Reb Level 194 Mouse, Muse, Some, Sue, Use, Sum Bonus Moues, Emus, Moue, Sumo, Emu, Som, Sou Level 195 Steps, Pest, Pets, Sets, Step, Pet, Set Bonus Pests, Septs, Psst, Sept, Pes Level 196 Cover, Core, Cove, Over, Rove, Ore, Rev Bonus Cero, Cor, Orc, Rec, Roc, Roe, Voe Level 197 Rebel, Beer, Reel, Bee, Eel, Lee Bonus Leer, Bel, Ere, Reb, Ree Level 198 Cloud, Could, Cold, Loud, Cod, Duo, Old Bonus Clod, Col, Cud, Doc, Dol, Oud Level 199 Field, Filed, File, Fled, Idle, Lied, Life, Die, Elf, Fed, Led, Lid, Lie Bonus Felid, Flied, Deil, Deli, Diel, Lief, Def, Del, Dif, Eld, Fid, Fil, Lei Level 200 Boost, Boots, Boot, Soot, Sob, Too Bonus Boos, Bots, Oots, Stob, Bot, Sot Kunci Jawaban Word Across Level 200 – 210 Level 201 Thank, Hank, Tank, Than, Ant, Hat, Tan Bonus Ankh, Hant, Khan, Khat, Kat, Nth Level 202 Grief, Fire, Rife, Ire, Rig, Fir Bonus Frig, Reif, Erg, Fer, Fig, Gie, Ref, Reg, Rif Level 203 Smart, Arms, Arts, Mars, Mast, Mats, Rats, Star, Tram, Arm, Art, Mar, Mat, Tar, Rat Bonus Marts, Trams, Mart, Rams, Tams, Tars, Tsar, Ram, Sat Level 204 Finds, Find, Fins, Din, Dis, Fin, Sin Bonus Difs, Dins, Fids, Dif, Fid Level 205 Mouth, Moth, Hot, Hum, Hut, Out Bonus Thou, Mho, Mot, Mut, Ohm, Tho, Tom Level 206 Story, Rosy, Sort, Toys, Rot, Soy, Toy, Try Bonus Ryots, Stroy, Troys, Tyros, Orts, Rots, Ryot, Tors, Tory, Troy, Tyro, Ort, Sot, Sty, Tor Level 207 Beams, Base, Beam, Mesa, Same, Seam, Sea Bonus Bemas, Mabes, Bams, Bema, Maes, Abs, Bam, Bes, Mae, Sab Level 208 Stalk, Talks, Last, Salt, Talk, Task, Ask Bonus Alts, Kats, Lats, Skat, Slat, Alt, Kas, Kat, Lat, Sal, Sat, Ska, Tsk Level 209 Cards, Arcs, Card, Cars, Scar, Arc, Car, Sad Bonus Cads, Rads, Sard, Scad, Ads, Rad, Sac Level 210 Doors, Door, Odor, Rods, Rod, Sod Bonus Odors, Ordos, Roods, Dors, Ordo, Rood, Dor Nah itulah tadi semua Kunci Jawaban game Word Across terlengkap dari level 1 sampai dengan level 210. Kabar Games akan mengupdatenya kembali jika telah menemukan kunci jawaban ke level lebih tinggi lainnya, jangan lupa baca juga kunci jawaban Tebak Gambar, TTS Pintar, TTS Jenius, Brain Blow, Stump Me dan Tebak Tebakan 2020! Nantikan terus berita terbaru dan terupdate seputar game dan gadget hanya di Kabar Games. (function(d,a,b,l,e,_) if(d[b]&&d[b].q)return;d[b]=function()(d[b].q=d[b].q;e=a.createElement(l); e.async=1;e.charset='utf-8';e.src='//static.dable.io/dist/plugin.min.js'; _=a.getElementsByTagName(l)[0];_.parentNode.insertBefore(e,_); )(window,document,'dable','script'); dable('setService', 'kabargames.id'); dable('sendLogOnce'); dable('renderWidget', 'dablewidget_KoEP9KXB');

https://www.kabargames.id/cobain-nih-6-tips-farming-mobile-legends-biar-cepat-kaya/

#TipsTrick #MobileLegends

#Tips & Trick #Mobile Legends

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trylks · 7 years ago

Photo

youtube

A social network where people don't upload photos of the inane happenings in their lives (e.g. trips) but they explain how those experiences have had an impact on them, and the difference with their former self. There, posts are actual "status updates".

— ⚗ trylks (@trylks)

February 22, 2018

Support paid monthly, only after delivery. Delivery competing in being fast and cheap, quality postponed for supporthttps://t.co/zMS434odjs

— ⚗ trylks (@trylks)

February 9, 2018

Negligibly when compared with the opportunity cost of not being able to optimize the knowledge economy.https://t.co/1Qb0CSSBsB

— ⚗ trylks (@trylks)

March 3, 2018

A cuttlefish is more hardwired and less intelligent (ℐ) than a human. If AI is less hardwired than a human it may have greater potential for ℐ. A cuttlefish cannot play Go. W/ AI we are approaching ℐ from a different angle. There's no reason for arbitrary constraints on it.

— ⚗ trylks (@trylks)

February 26, 2018

Nash redefines moves in a game as a function that maps pre-move positions to post-move positions; and then applies Kakutani's fixed point theorem to show that the game has an equilibrium.

— Richard Tol (@RichardTol)

February 19, 2018

Superintelligence does not exist yet. Capitalism is the system in which we live. What about seriously addressing capitalism safety issues? Wetware is slower and less scalable than hardware, but there are long neglected bugs in the software it is running.https://t.co/BOdkizfzl6

— ⚗ trylks (@trylks)

March 3, 2018

Maybe we can conceive a society (& economy) where who says what is less important than getting things done and rewarding those who contribute positively even if anonymously. That would solve so many problems at once…

— ⚗ trylks (@trylks)

March 2, 2018

All models are wrong. Some are useful. Useful for what? To survive. The survival of volition is the most important thing, as it is the only necessary condition for the existence of importance.

— ⚗ trylks (@trylks)

February 27, 2018

Avoiding all risk of failure is a guarantee of inaction, which is in itself a failure

— ⚗ trylks (@trylks)

February 24, 2018

"5. Go to the public as a little child"https://t.co/ahdYpGQENc pic.twitter.com/VJW76iJYb3

— ⚗ trylks (@trylks) January 27, 2017

I just wanted to link this tweet here:https://t.co/gQe68Kwlbw

— ⚗ trylks (@trylks) March 20, 2018

Related: we need a education revolution (condense/focus/rethink) ∵ time required to spend as a low income student cannot keep growing (eg procreate) I know ∃attempts from @coursera @AndrewYNg …but that's not REPLACING the status quo yet. ∃limitationshttps://t.co/X6xCnVOGRk

— ⚗ trylks (@trylks) March 21, 2018

JavaScript, Python: no parallelism JVM: no tail call optimization C/C++: manual memory release Rust: &mut Lang<f64> Ruby: 🙈 Perl: ~~<> Haskell: ineffectual Prolog:- !. R, PHP, Go, HTML,…: ಠ_ಠ https://t.co/t1d5MqLznA

— ⚗ trylks (@trylks) March 14, 2018

0 notes

khuey · 8 years ago

Text

Lazy Initialization in Rust

Today I published lazy-init, a Rust crate that scratches an itch I’ve had for a while. lazy-init is designed for when:

you want to do some work (a computation, disk I/O, etc) lazily,

the product of this work is immutable once it is created,

and you want to share this data across threads.

Rust has a good built-in solution if you only require #s 1 and 2: the Option type. But requirement #3 makes things much harder. Both of the built-in, thread-safe primitives for interior mutability have significant drawbacks, as we’ll see later. But first, the API!

impl<T> Lazy<T> { /// Construct a new, uninitialized `Lazy<T>`. pub fn new() -> Lazy<T>;

/// Get a reference to the contained value, invoking `f` to create it /// if the `Lazy<T>` is uninitialized. It is guaranteed that if multiple /// calls to `get_or_create` race, only one will invoke its closure, and /// every call will receive a reference to the newly created value. /// /// The value stored in the `Lazy<T>` is immutable after the closure returns /// it, so think carefully about what you want to put inside! pub fn get_or_create<'a, F>(&'a self, f: F) -> &'a T where F: FnOnce() -> T;

/// Get a reference to the contained value, returning `Some(ref)` if the /// `Lazy<T>` has been initialized or `None` if it has not. It is /// guaranteed that if a reference is returned it is to the value inside /// the `Lazy<T>`. pub fn get<'a>(&'a self) -> Option<&'a T>; }

There’s a constructor and two methods, one to get an existing value and another to get_or_create the value if it does not already exist. get_or_create will ensure that the closure is invoked only once even if multiple threads race to call it on an uninitialized Lazy<T>. Simple enough, right?

Lazy<T> is actually a degenerate version of a more generic LazyTransform<T, U> included in the crate which is initialized with a T that is later converted to a U. Lazy<Foo> is essentially LazyTransform<(), Foo>. For simplicity, I’ll refer to them interchangeably.

Rust provides two primitives for threadsafe interior mutability, std::sync::Mutex and std::sync::RwLock. Lazy<T> is better than both of them because:

Unlike the locking types, Lazy<T> guarantees immutability after the value is created. This also means you can hold an immutable reference to the interior value without having to hold the lock.

Unlike std::sync::Mutex, Lazy<T> does not exclude multiple readers after the value is created, and a panic while reading the value will not poison the Lazy<T>.

Lazy<T> is at least no worse in performance compared to either locking type, and likely much better.

The first two are self-explanatory, so lets dive into the third one. On Unix systems, std::sync::Mutex and std::sync::RwLock boil down to pthread_mutex_t and pthread_rwlock_init respectively. Lazy<T> meanwhile, becomes a single std::sync::Mutex and a std::sync::atomic::AtomicBool.

The (slightly simplified, to elide details not relevant to synchronization) code inside get_or_create looks like

if !self.initialized.load(Ordering::Acquire) { // We *may* not be initialized. We have to block to be certain. let _lock = self.lock.lock().unwrap(); if !self.initialized.load(Ordering::Relaxed) { // Ok, we're definitely uninitialized. // Safe to fiddle with the UnsafeCell now, because we're locked, // and there can't be any outstanding references. let value = unsafe { &mut *self.value.get() }; *value = f(value); self.initialized.store(true, Ordering::Release); } else { // We raced, and someone else initialized us. We can fall // through now. } }

// We're initialized, our value is immutable, no synchronization needed. *self.value.get()

Where self.value is an UnsafeCell. This is a standard double-checked locking pattern. Jeff Preshing has a great explanation of how this pattern actually works, and why the various Ordering values are what they are here. The simple explanation is that the AtomicBool::store call with Ordering::Release after the closure synchronizes with the AtomicBool::load call with Ordering::Acquire at the top of the function. So if a thread sees the write to self.initialized it must also see the write to self.value. If a thread doesn’t see that write, it grabs the lock. Memory accesses cannot be reordered across a lock acquisition or release (because, internally, a mutex uses semantics that are at least as strong as the acquire/release semantics mentioned before) so self.initialized is now a definitive source of truth. The lock also ensures that only one thread invokes the closure no matter how many threads are racing.

The code inside get is even simpler

if self.initialized.load(Ordering::Acquire) { // We're initialized, our value is immutable, no synchronization needed. Some(&*self.value.get()) } else { None }

We use the same acquire semantics as before to check if we are initialized. You’ll notice that we don’t have to acquire a lock at all here. Even in get_or_create, we only have to acquire the lock if self.initialized appears to be false. Once that write propagates to all threads, Lazy<T> allows lock-free access to the underlying value at the cost of a single load-acquire check.

Best of all, with x86′s strong memory model, every load from memory has acquire semantics. The atomic operations here really just tell the compiler not to do anything crazy with reordering. This is not true on other architectures with weaker memory models. On ARM, for instance, getting load-acquire semantics does require a DMB instruction. Peter Sewell maintains a list of what the various atomic orderings map to on different architectures.

Depending on your pthreads implementation and architecture the performance of pthread_mutex_t and pthread_rwlock_t can vary wildly. But as any sort of read-write lock needs to, at the bare minimum, both ensure there are no outstanding writers and increment the read count, a pthread_rwlock_t is never going to be any faster than the single load-acquire that Lazy<T> performs.

I hope others find this crate useful. Bug reports and pull requests are always welcome!

EDIT: Thanks to Huon for pointing out that I needed to bound the contained type with Sync

#mozilla #rust #threads #pthreads #rustlang

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cancersfakianakis1 · 7 years ago

Text

Autozygosity mapping of methylmalonic acidemia associated genes by short tandem repeat markers facilitates the identification of five novel mutations in an Iranian patient cohort

Abstract

Isolated Methylmalonic acidemia/aciduria (MMA) is a group of inborn errors of metabolism disease which is caused by defect in methylmalonyl-CoA mutase (MCM) enzyme. The enzyme has a key function in the catabolism of branched chain amino acids (BCAA, isoleucine, and valine), methionine, and threonine. MCM is encoded by a single gene named “MUT”. Other subtypes of MMA are caused by mutations in cblA (encoded by MMAA) and cblB (encoded by MMAB), which is involved in the synthesis of methylmalonyl–coenzyme A cofactor. Different types of mutations have been identified as the cause of MMA. However, the mutation spectrum of MMA in Iran has not been studied so far. Here, we aimed to investigate the MMA causative mutations in the Iranian population. Using STR (Short Tandem Repeat) markers, we performed autozygosity mapping to identify the potential pathogenic variants in 11 patients with clinical diagnosis of MMA. Nineteen STR markers which are linked to the MUT, MMAA and MMAB genes (the genes with known causative mutations in MMA) were selected for PCR-amplification using two recently designed multiplex PCR panels. Next, the families that were diagnosed with homozygous haplotypes for the candidate genes were directly sequenced. Five novel mutations (c.805delG, c.693delC, c.223A > T, c.668A > G and c.976A > G in MUT) were identified beside other 4 recurrent mutations (c.361insT in MUT, c.571C > T and c.197–1 G > T in MMAB and c.1075C > T in MMAA). In silico analyses were also performed to predict the pathogenicity of the identified variants. The mutation c.571C > T in MMAB was the most common mutation in our study.

https://ift.tt/2xje4eB

#Oncology-Sfakianakis

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nelhagedebugsshit · 7 years ago

Text

Experience report: Trying to map over over a binary tree in Rust

This story is simplified from an attempt to write an AST walker for a toy compiler, but the essential facts are unchanged.

I am fairly new to Rust (but an experienced C++ programmer) and have been trying to pick up Rust recently. This evening I spent a miserable hour trying to write a function to map an FnMut over a binary tree. I started with a simple tree definition, and try to write what seems to me to be the straightforward code:

use std::rc::Rc; #[derive(Debug)] enum Tree { Leaf(i32), Node(Rc<Tree>, Rc<Tree>), } fn map_tree<F>(tree: &Rc<Tree>, f: F) -> Rc<Tree> where F: FnMut(Rc<Tree>) -> Rc<Tree>, { match &**tree { &Tree::Leaf(_) => f(Rc::clone(tree)), &Tree::Node(ref l, ref r) => Rc::new(Tree::Node(map_tree(&l, f), map_tree(&r, f))), } } pub fn main() { let tree = Rc::new( Tree::Node(Rc::new(Tree::Leaf(0)), Rc::new(Tree::Leaf(1))), ); let mut sum = 0; map_tree(&tree, |node| { match *node { Tree::Leaf(i) => sum = sum + i, _ => unreachable!() } node }); print!("sum={}", sum); }

(playground link)

I've got a vague premonition that the borrow-checker will yell at me for using f twice in that latter clause, but hey, let's see what it says. It says:

error[E0596]: cannot borrow immutable argument `f` as mutable --> src/main.rs:14:27 | 9 | fn map_tree<F>(tree: &Rc<Tree>, f: F) -> Rc<Tree> | - consider changing this to `mut f` ... 14 | &Tree::Leaf(_) => f(Rc::clone(tree)), | ^ cannot borrow mutably error[E0382]: use of moved value: `f` --> src/main.rs:15:87 | 15 | &Tree::Node(ref l, ref r) => Rc::new(Tree::Node(map_tree(&l, f), map_tree(&r, f))), | - ^ value used here after move | | | value moved here | = note: move occurs because `f` has type `F`, which does not implement the `Copy` trait

Well, I was right. Let's start by following the first piece of advice, from the E0596:

fn map_tree<F>(tree: &Rc<Tree>, mut f: mut F) -> Rc<Tree> where F: FnMut(Rc<Tree>) -> Rc<Tree>, { match &**tree { &Tree::Leaf(_) => f(Rc::clone(tree)), &Tree::Node(ref l, ref r) => Rc::new(Tree::Node(map_tree(&l, f), map_tree(&r, f))), } }

(playground link)

First error is resolved, but the second remains unchanged:

error[E0382]: use of moved value: `f` --> src/main.rs:15:87 | 15 | &Tree::Node(ref l, ref r) => Rc::new(Tree::Node(map_tree(&l, f), map_tree(&r, f))), | - ^ value used here after move | | | value moved here | = note: move occurs because `f` has type `F`, which does not implement the `Copy` trait

Well, I've started to pick up Rust; I know what to do when I'm using a value temporarily and then want to use it again: I probably need more borrows. Because I'm new to this, I forget to borrow mutably:

fn map_tree<F>(tree: &Rc<Tree>, mut f: F) -> Rc<Tree> where F: FnMut(Rc<Tree>) -> Rc<Tree>, { match &**tree { &Tree::Leaf(_) => f(Rc::clone(tree)), &Tree::Node(ref l, ref r) => Rc::new(Tree::Node(map_tree(&l, &f), map_tree(&r, &f))), } }

(playground link)

This makes that error go away, but replaces it with a different -- very confusing -- spew:

error[E0277]: the trait bound `F: std::ops::Fn<(std::rc::Rc<Tree>,)>` is not satisfied --> src/main.rs:15:57 | 15 | &Tree::Node(ref l, ref r) => Rc::new(Tree::Node(map_tree(&l, &f), map_tree(&r, &f))), | ^^^^^^^^ the trait `std::ops::Fn<(std::rc::Rc<Tree>,)>` is not implemented for `F` | = help: consider adding a `where F: std::ops::Fn<(std::rc::Rc<Tree>,)>` bound = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&F` note: required by `map_tree` --> src/main.rs:9:1 | 9 | / fn map_tree<F>(tree: &Rc<Tree>, mut f: F) -> Rc<Tree> 10 | | where 11 | | F: FnMut(Rc<Tree>) -> Rc<Tree>, 12 | | { ... | 16 | | } 17 | | } | |_^

Why is std::ops::Fn suddenly appearing? I said FnMut. What is going on?

I eventually google around and realize I need more muts:

(playground link)

This now compiles the implementation, but blows up with a recursion limit at the call site!

error[E0275]: overflow evaluating the requirement `[closure@src/main.rs:22:21: 28:6 sum:&mut i32]: std::ops::FnMut<(std::rc::Rc<Tree>,)>` | = help: consider adding a `#![recursion_limit="128"]` attribute to your crate = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&mut [closure@src/main.rs:22:21: 28:6 sum:&mut i32]` = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&mut &mut [closure@src/main.rs:22:21: 28:6 sum:&mut i32]` = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&mut &mut &mut [closure@src/main.rs:22:21: 28:6 sum:&mut i32]` = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&mut &mut &mut &mut [closure@src/main.rs:22:21: 28:6 sum:&mut i32]` = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&mut &mut &mut &mut &mut [closure@src/main.rs:22:21: 28:6 sum:&mut i32]` = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&mut &mut &mut &mut &mut &mut [closure@src/main.rs:22:21: 28:6 sum:&mut i32]` = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&mut &mut &mut &mut &mut &mut &mut [closure@src/main.rs:22:21: 28:6 sum:&mut i32]` = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&mut &mut &mut &mut &mut &mut &mut &mut [closure@src/main.rs:22:21: 28:6 sum:&mut i32]` = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&mut &mut &mut &mut &mut &mut &mut &mut &mut [closure@src/main.rs:22:21: 28:6 sum:&mut i32]` = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&mut &mut &mut &mut &mut &mut &mut &mut &mut &mut [closure@src/main.rs:22:21: 28:6 sum:&mut i32]` = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut [closure@src/main.rs:22:21: 28:6 sum:&mut i32]` = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut [closure@src/main.rs:22:21: 28:6 sum:&mut i32]` = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut [closure@src/main.rs:22:21: 28:6 sum:&mut i32]` = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut [closure@src/main.rs:22:21: 28:6 sum:&mut i32]` = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut [closure@src/main.rs:22:21: 28:6 sum:&mut i32]` = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut [closure@src/main.rs:22:21: 28:6 sum:&mut i32]` = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut [closure@src/main.rs:22:21: 28:6 sum:&mut i32]` = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut [closure@src/main.rs:22:21: 28:6 sum:&mut i32]` = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut [closure@src/main.rs:22:21: 28:6 sum:&mut i32]` = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut [closure@src/main.rs:22:21: 28:6 sum:&mut i32]` = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut [closure@src/main.rs:22:21: 28:6 sum:&mut i32]` = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut [closure@src/main.rs:22:21: 28:6 sum:&mut i32]` = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut [closure@src/main.rs:22:21: 28:6 sum:&mut i32]` = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut [closure@src/main.rs:22:21: 28:6 sum:&mut i32]` = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut [closure@src/main.rs:22:21: 28:6 sum:&mut i32]` = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut [closure@src/main.rs:22:21: 28:6 sum:&mut i32]` = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut [closure@src/main.rs:22:21: 28:6 sum:&mut i32]` = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut [closure@src/main.rs:22:21: 28:6 sum:&mut i32]` = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut [closure@src/main.rs:22:21: 28:6 sum:&mut i32]` = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut [closure@src/main.rs:22:21: 28:6 sum:&mut i32]` = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut [closure@src/main.rs:22:21: 28:6 sum:&mut i32]` = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut [closure@src/main.rs:22:21: 28:6 sum:&mut i32]` ...

At this point I'm pretty stuck and pretty frustrated.

But I need to break the recursion somehow, so maybe I need to also make map_vars take a reference so the inner and outer calls have the same type? I've not yet mastered Rust syntax, but I know &mut is a thing, and I've already got a mut in the signature, so let's stick an & on it:

fn map_tree<F>(tree: &Rc<Tree>, &mut f: F) -> Rc<Tree> where F: FnMut(Rc<Tree>) -> Rc<Tree>, { match &**tree { &Tree::Leaf(_) => f(Rc::clone(tree)), &Tree::Node(ref l, ref r) => Rc::new(Tree::Node(map_tree(&l, &mut f), map_tree(&r, &mut f))), } }

(playground link)

New error!

error[E0308]: mismatched types --> src/main.rs:9:33 | 9 | fn map_tree<F>(tree: &Rc<Tree>, &mut f: F) -> Rc<Tree> | ^^^^^^ expected type parameter, found &mut _ | = note: expected type `F` found type `&mut _` = help: did you mean `mut f: &F`?

Well, there's a helpful "did you mean"; let's try that:

fn map_tree<F>(tree: &Rc<Tree>, mut f: &F) -> Rc<Tree> where F: FnMut(Rc<Tree>) -> Rc<Tree>, { match &**tree { &Tree::Leaf(_) => f(Rc::clone(tree)), &Tree::Node(ref l, ref r) => Rc::new(Tree::Node(map_tree(&l, &mut f), map_tree(&r, &mut f))), } }

(playground link)

No luck, and we're back to complaining about Fn, which I still haven't mentioned anywhere:

error[E0277]: the trait bound `F: std::ops::Fn<(std::rc::Rc<Tree>,)>` is not satisfied --> src/main.rs:15:57 | 15 | &Tree::Node(ref l, ref r) => Rc::new(Tree::Node(map_tree(&l, &mut f), map_tree(&r, &mut f))), | ^^^^^^^^ the trait `std::ops::Fn<(std::rc::Rc<Tree>,)>` is not implemented for `F` | = help: consider adding a `where F: std::ops::Fn<(std::rc::Rc<Tree>,)>` bound = note: required because of the requirements on the impl of `std::ops::FnMut<(std::rc::Rc<Tree>,)>` for `&F` note: required by `map_tree` --> src/main.rs:9:1 | 9 | / fn map_tree<F>(tree: &Rc<Tree>, mut f: &F) -> Rc<Tree> 10 | | where 11 | | F: FnMut(Rc<Tree>) -> Rc<Tree>, 12 | | { ... | 16 | | } 17 | | } | |_^

At this point I gave up and asked a Rustacean I knew on IRC, who pointed out that I was so close, and yet so far:

fn map_tree<F>(tree: &Rc<Tree>, f: &mut F) -> Rc<Tree> where F: FnMut(Rc<Tree>) -> Rc<Tree>, { match &**tree { &Tree::Leaf(_) => f(Rc::clone(tree)), &Tree::Node(ref l, ref r) => Rc::new(Tree::Node(map_tree(&l, f), map_tree(&r, f))), } }

(playground link)

I can, with the benefit of hindsight, more-or-less understand what happened and the error messages at every step of the way. However, the experience of getting there was really frustrating, notably because at no point did the "did you mean" suggestions actually lead me particularly closer to my goal, and because I had to go by way of a compiler recursion overflow(!) before I could reach a working program.

I want to be really excited about Rust; We nede something that can replace C++'s capacity for powerful zero-cost abstractions and native compilation, while being less ridden with awful memory safety bugs. So far, though, personally, this interaction is honestly about median in terms of my experience trying to write Rust. I'm sure it will get better with time, but right now I'm grumpy.

#rust

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