#dependency injection

[specbee-c-s]

Understanding Services and Dependency Injection in Drupal

Every Drupal developer should understand Services and Dependency Injection. Learn how these concepts simplify coding, improve efficiency, and help create cleaner, more scalable Drupal websites.

[mumblingstudent]

Инверсия контроля и Внедрение зависимостей (IoC и DI)?

Инверсия контроля (она же инверсия управления или inversion of control) подразумевает ослабление связей между объектами в программе и передачу управления потоком выполнения фреймворку.

Ослабления связей между объектами

Существует два класса: Person (человек) и Dress (платье). Человеку нужно носить одежду и мы можем дать ему платье следующим образом:

class Person { private Dress clothes = new Dress(); }

Вроде всё получилось, но теперь этот человек может носить только платья. А если ему придётся надеть что-то другое?

Это сильная зависимость. И её можно ослабить, написав интерфейс:

interface Clothes { //какие-то методы одежды }

Далее, классом Dress реализовать данный интерфейс:

class Dress implements Clothes { //какие-то поля платья }

И заменить класс Dress у поля Person на интерфейс Clothes:

class Person { private Clothes clothes = new Dress(); }

Теперь, если мы захотим одеть человека во что-нибудь другое, мы можем написать новый класс, скажем, для костюма, реализовать им интерфейс одежды и просто передать человеку:

class Suit implements Clothes { //какие-то поля костюма }

class Person { private Clothes clothes = new Suit(); }

Отлично, теперь наш код стал гибче, но осталось исправить ещё одну вещь.

Категорически не рекомендуется создавать необходимые объекты через new внутри других классов. Вместо этого надо принимать объекты извне. Для этого используются конструкторы или сеттеры.

class Person { private Clothes clothes; //конструктор public Person(Clothes clothes) { this.clothes = clothes; } //сеттер public void setClothes(Clothes clothes) { this.clothes = clothes; } }

И после этого объект Person можно будет создать в главном классе, который является точкой начала выполнения программы:

public class Main { public static void main(String[] args) { //создали человека в платье Person person = new Person(new Dress()); //переодели человека в костюм person.setClothes(new Suit()); } }

Передача объектов внутрь других объектов и называется Dependency Injection (внедрение зависимостей)

Передача управления фреймворкам

Без фреймворков программист сам решает что, где, и в какой последовательности работает. В ином случае, уже фреймворк решает, что и когда заработает в коде (чаще всего это реакции на действия пользователей web-приложений), а программист пишет код только там, где дозволено (в контроллерах, сервисах и пр.).

Ну вроде понятно.

[aylinaliens]

you know the au where a flower shop and tattoo shop are right next to each other and the characters kiss kiss fall in love? walk with me: kingdon au where mel works at the tattoo shop okay it’s steady income while she goes to med school & she finds the whole thing to be so fascinating runs into the newest worker at the flower shop right next door. mel goes there all the time w/ becca because becca got REALLY into ikebana after workshop at her center. she’s very friendly with the owner, a very sweet elderly woman named mary beth who always helps becca pick out the best flowers to go with whatever flower arrangement she’s working on. she’s coming off a long day of lectures and a shift at the tattoo shop when she stops by the flower shop to pick up some lilies for becca.

except the person behind the counter is not mary beth. no, it’s a tall man with striking blue eyes, a little divot in his chin, and dark hair that swoops perfectly against his forehead and a charming smile that makes her stomach do something weird and fluttery. he introduces himself as frank langdon—mary beth’s grandson who is helping out at the shop occasionally when he’s not working. because oh yeah did he mention? he’s a first year resident and of course she knew that because mary beth love to gush about her grandson and coincidentally guess what!!! mary beth also gushed about mel to frank just as much

keep on walking with me! the two of them become friends and one day frank waltzes into the shop and asks if mel will give him a tattoo. he wants a daisy right on his chest near his collarbone near his heart. mel does it and tries very hard to keep it professional and clinical because frank is laying back on the table with no shirt on and his gaze is so focused on her hands and the flush that is no doubt high on her cheekbones. she tries so hard to not think about the fact that daisies are her favorite flowers and that she offhandedly told him that a few months ago when they were first starting to get to know each other. she ignores the vase next to her workstation full of daisies and sunflowers that guess who handed them to her a few days ago. something something something they kiss. they kiss some more. and they fall in love.

[cr0wqui11]

No One Mourns the Wicked but nobody caring that Penny Lamb went missing. Except Ezra. No, one mourns the wicked.

[johaerys-writes]

Chat I'm straight up not having a good time

[simcardiac-arrested]

compensation :-]

CAN ANYBODY HEAR ME

[rabbiteclair]

PROGRAMMER OFFICE ETIQUETTE

✓ Acceptable: "This service is too large, and needs to be broken into smaller, more specialized services."

⚠ Potentially Acceptable: "I want to chop this service into pieces with a machete."

🛇 Not Acceptable, Apparently: "I want to chop this service into pieces with a machete and dispose of the chunks in half a dozen dumpsters so it's harder for the cops to investigate."

[lovelaceisntdead]

pebbles might have to be sedated tomorrow and I'm really trying to be okay about it

[lizclipse]

genuinely, signals & control flow & the inject function have taken angular from being a "meh it has it's uses but it's not great" UI framework to one of my favs in the space. the way you structure components now is so unbelievably different to when i started with it back at like v6 it's like an entirely new framework and honestly it's really fun to use. i'm actually looking forward to new releases since it always opens the door to new and interesting ways of doing something that's easier than before, and i actually want to make UIs with it instead of pining for something else

[darkstalker1247]

would any of you give a shit if I wrote a fic with Shadow and my sona in it

[racke7]

Exam hit me with two concept that I've literally never heard of (or at least never been explained to me).

"semantic html" -> the <> with things like "img" and other clearly-defined content to them.

"dependency injection" -> a method that receives objects, instead of creating them from scratch (aka, literally how all of our programming is done).

Thankfully, they only amount to 15% of the exam-result, so hopefully I'll still pass?

[endwersed]

WIP Whenever

Tagged by the amazing @dear-massacre 💖

I've been drifting between two WIPs over the last month or so, but for the past week I've been heavily drawn into my college baseball au - where Theo is Derek's new teammate and Stiles is Theo's long-term boyfriend.

So - here's a bit of that! It's called striking out and will (hopefully) be posted to AO3 early in the new year.

-

“So," Derek says. "You and Theo. You’ve been together a – while, then?”

“Since sophomore year of high school,” Stiles replies, before snorting an inelegant laugh. “Was a pretty big shock even to me when I found myself actually saying yes to him asking me out.”

Derek’s eyebrows draw together. “What do you mean by that?”

“I just mean, I don’t know.” Stiles cuts off, mouth twisting around the words Derek can almost see whirring behind his forehead. The cluster of dorm buildings encroach into their line of sight. “I didn’t exactly… like him, in middle school. Or elementary school. Or kindergarten, for that matter.”

Derek’s eyebrows shoot up his forehead. “Why didn’t you like him?”

Stiles pauses, biting at his lip. There are goosebumps raised on the exposed part of his forearms, right around the jutting bone of his wrists, and he crosses his arms back over his chest again as a shiver wracks through his body. Derek lets himself list closer as they walk, just an inch, just in the hope that maybe he can impart even a little of his body heat, even if they’re still not quite touching.

“He was,” Stiles starts, trailing off like he’s looking for the right words, “not the… nicest guy, before high school.”

Derek takes that in for a second, narrowing his eyes and tipping his head sideways.

“Meaning – he was a bully,” he parses.

“Bully is a strong word,” Stiles defends instantly, and it sounds more than a little well-practiced. “He was a kid and kinda a jerk. I mean – who wasn’t a little asshole when they were twelve? He grew out of it by high school, is what matters.”

Derek bites back the huff of disbelieving laughter that wants to rip from his chest. He’s not sure it can be said that Theo has grown out of being a jerk now, by college, let alone high school. He won’t say this, though. Something tells him the guy’s devoted and adoring boyfriend probably won’t take it all that well.

“What did he do to win you over?” Derek presses. “Grand gesture at the big football game?”

“He stopped shoving me into lockers for a year and asked me out for curly fries.” Stiles shrugs a casual shoulder at the distressed look Derek shoots him. “I really like curly fries.”

“Right,” Derek says slowly. “I’m – starting to think bully might have been the right word, actually.”

Stiles rolls his eyes as he whirls to a stop in front of the door to a tall, grey building. They must have reached his dorm, Derek quickly guesses.

“It’s not as after school special as it sounds,” Stiles assures him. “I was a huge nerd. A lot of the sports guys liked shoving me in lockers in middle school. He’s just the only one that got the hots for me once I started to grow my hair out.”

“Very romantic,” Derek says drily. “I’m sure Hallmark will be asking for the rights in no time.”

[atissi]

if you are 1) currently in a university where your student healthcare covers hormone therapy, and 2) in a good financial, emotional, and social position to start hormone therapy, i would recommend pursuing it. because in my experience, it's a huge pain in the ass to get an endocrinologist once you're on your own

[asexual-levia-tan]

saw someone say that if the webnovel version of s classes (856 chapters) is too intimidating, try reading the manhwa first to see if you'd be interested

which is extremely funny to me, a person who finds the manhwa way more lighthearted and also hated it so much i could barely get through the first 40 chapters

i mean honestly with the amount of humor injected into the manhwa and the way certain story arcs are rearranged (and added, in some cases), the manhwa seems like a completely different story to me.

[sapienthouse]

[ID from alt:

A graphic of various injections and what they look like inside the skin. The layers of the skin are depicted:

Epidermis

Dermis

Subcutaneous Tissue

Muscle

For Intramuscular Injections:

A needle is injected into the skin at a ninety degree angle and passes through every layer of skin right to the muscle. (layer four of the skin).

For Subcutaneous Injection:

A syringe is injected into the skin at a fourty-five degree angle and passes through the skin until it reaches the Subcutaneous Tissue of the body (layer three of the skin).

For intradermal injection:

A syringe is injected into the skin at a 10-15 degree angle and passes the epidermis until it reaches the dermis (layer two of the skin). end ID]

One of my biggest pieces of advice for those taking injectable hormones is to make sure you're injecting at the right angle

For intramuscular (IM), you inject at a 90° angle.

For subcutaneous (SQ), you inject at a 45° angle.

Here is a graphic depicting what the angle of your injection should look like:

An image description is provided in the ALT text.