#kotlin delegates

[codezup]

Simplify Your Code with Kotlin's Delegated Properties

Using Kotlin’s Delegated Properties to Simplify Your Code 1. Introduction Kotlin’s delegated properties are a powerful feature that allows developers to encapsulate property access and manipulation logic into separate objects, making your code cleaner, more maintainable, and reusable. By leveraging delegated properties, you can avoid boilerplate code and focus on the core logic of your…

[one-earbuds1]

The Comprehensive Guide to Kotlin Programming : A Complete Reference Guide

Kotlin Basics: Explore Kittens origin at JB, evolution, Android role. Benefits over Java: conciseness, interop., coroutines, null safety, immutability. - Env. Setup: Set up Kotlin env. w/ AS. Write/execute first Kotlin app, learn main func., comp. & exec. process.- Syntax: Variables, type inference, types, nullability, coding standards.- Adv. Constructs: Generics, delegation, extensions, null safety, exceptions, annotations, reflection, DSLs.- Concurrency: Coroutines, Flow for async tasks.- Android Dev.: Activities, fragments, ViewModel, Live Data, UI design, Jetpack Compose.- Data & Networking: Persist data w/ SP, Room; network w/ Retrofit, Ok Http; JSON w/ Gson/Moshi.- Jetpack & Arch.: Navigation, pagination (Paging Lib.), background tasks (Work Manager).- Best Practices: Focus on Android dev. best practices, arch. for scalability, maintainability

Book -> FREE

[zulfen]

kotlin has so many nice features like delegation which makes certain things i want to do so much nicer. If you are wondering what this is , currently working on a heardle clone (writing the backend first) once i get fully comfortable i dont think i will ever go back to java

[mahi85sharma]

Twilio Migration Guide: IOS SDK

Introduction

This tutorial will help you convert from your existing Twilio Video configuration to the EnableX iOS Video SDK instructions. We recommend that anyone starting a new project refer to the EnableX Video SDK manual for advice. We guarantee a smooth transition for all Twilio users wishing to transfer to a dependable alternative with no fuss. Begin with a free trial to see for yourself how easy integration is.

Quick Start: EnableX Android Video Sample Applications

Explore a range of example programs designed for diverse programming environments, such as Java and Kotlin. Each sample app is accessible on GitHub, and it provides realistic examples to help you get started with your video calling project. Video Calling QuickStart documentation for iOS

Step 1: Begin with EnableX

Start Your Free Trial in Minutes

We’ve got you covered with a migration path that feels familiar yet innovative.

Sign Up Easily: Go to the EnableX portal and select Try for Free.

Quick Registration: Provide your details; name, phone number, company, email and agree to the Terms of Service.

Account Verification: Check your email and click the verification link.

Step 2: Set Up Your Video Calling Project

Login to the EnableX Portal with the credentials.

Creating Your First Video Project with EnableX

Create a New Project: Launch your video project with our user-friendly dashboard.

Enable Video Service: Activate video capabilities in one simple step within your project settings.

Secure Your Application: App ID and App Key

Before diving into development, you'll need to secure your application with EnableX's authentication credentials. Here's how to get started:

Obtain API Credentials: After project creation, we'll email your App ID and App Key.

Reset or Resend: Easily manage your credentials within the portal, under 'Project Credentials'.

Implementation: Use these credentials in the HTTP Basic Authentication Request Header for secure API calls.

Step 3: Integrate EnableX on the Client Side

Developer's Corner: Build Your Way

For integrating EnableX SDKs into your Android app:

Remove Twilio SDK: First, remove the Twilio SDK from your project, including any related code and tags.

Download and Extract EnableX SDKs: Download the EnableX iOS SDK and iOS Web RTC Library. Extract the files from the zip packages.

Install EnableX SDK via CocoaPods

Install CocoaPods following the instructions on the CocoaPods website.

In your project directory, run pod init in the terminal.

Add pod ' EnxRTCiOS' to your Podfile to integrate the EnableX iOS SDK.

Run pod install in the terminal.

Reopen your project in Xcode using the new .xcworkspace file.

Include Socket.IO-Client-Swift

Add pod Socket.IO-Client-Swift(15.0.0) in your Podfile as it Is required for EnableX iOS SDK.

'Socket.IO-Client-Swift', '~> 15.0.0'

Step 4: Start and Join Sessions

Twilio

let connectOptions = ConnectOptions(token: accessToken) { (builder) inbuilder.roomName = "existing-room"}let room = TwilioVideoSDK.connect(options: connectOptions, delegate: self)

Start and join Session with EnableX

1. Initialize and Join Room

Initialize the EnxRtc object.

var enxRtc = EnxRtc()

2. Join Room

Use enxRtc to join a room with the required token, stream, and room information.

2.  guard let stream = enxRtc.joinRoom(token, delegate: self,3.  publishStreamInfo: localStreamInfo, roomInfo: roomInfo, advanceOptions:nil) else { return }

3. Publish Stream

On the didConnect callback, publish your local stream.

enxRoom.publish(localStream)

4. Attach Renderer to Local Stream

Attach EnxPlayerView to the local stream.

localStream.attachRenderer(EnxPlayerView)

5. Subscribe to Remote Streams

Subscribe to remote streams when didAddedStream callback is received.

enxRoom.subscribe(stream)

6. Handle Active Talkers

Use the Active Talker APIs to manage the display of active talkers.

func room(_ room: EnxRoom?, didActiveTalkerList Data: [Any]?)func room(_ room: EnxRoom?, didActiveTalkerView view: UIView?)

7. End or Destroy the Call:

Use room.disconnect () or room.destroy () to end the session as needed.

For detailed information on the features and implementation of the EnableX iOS Video SDK, please refer to the EnableX iOS Video SDK Documentation. This resource offers comprehensive insights into the capabilities of the SDK, enabling the development of sophisticated and feature-rich video conferencing solutions. If you have specific feature needs, the documentation offers valuable instructions and support.

[csharp-official]

My thoughts on languages are pretty similar.

I prefer strong and static typing, so Python and a bunch of other dynamic languages never truly appealed to me.

Go is a joke (also honestly I hate Google even more than I hate Microsoft)

No one would use Dart if it wasn't for Flutter

I tried Java before and it made me angry

I used C++ for years, but I realized it's unsalvageable, which made me seek out alternatives in the first place.

Haskell and others are cool but too obscure

Kotlin is a significant improvement over Java as a language but I'm not a fan of JVM and the Java standard library. That being said if I am forced to deal with JVM, I will definitely pick Kotlin.

Same applies to TypeScript, which means dealing with JavaScript nonsense, so if I'm forced to deal with JavaScript nonsense, I will be using TypeScript.

Rust was lacking in tooling support last time I checked, but this sounded like something fixable. Holding my thumbs that JetBrains RustRover is good!

And all of this resulted with me settling on C#.

I think C# is better off not having checked exceptions, the way Java implemented them was a mistake, Kotlin straight up doesn't check for these either. My code usually uses an equivalent of Result<T, E> for stuff where user is expected to check for the result instead, and I wish that more code adopts this convention instead of "DoX vs TryDoX".

Regarding debuggers, Samsung made an MIT licensed one way back. Does it work? Not sure, haven't tried it. But the fact it exists is reassuring.

As for GUI - indeed, GUI is the biggest weakness of cross-platform C# because Microsoft simply does not care for it. There is huge money in providing cloud services and huge opportunities for vendor lock-in through Azure stuff, so naturally Microsoft puts in a lot of effort into making sure that ASP.NET Core works on Linux. But cross-platform GUIs? This would mean providing a route for people to escape Windows, and that's not good for profits.

Even their latest GUI toolkit, MAUI has Linux support "delegated to the community". Last time I checked Avalonia in 2021, it had teething problems due to having its controls drawn by themselves (rule of thumb: if you're not delegating widgets to someone else, you're likely missing from 20% to 80% of the existing functionality). Apparently "user can't type Japanese text in a textbox" which blocked me specifically was solved in 2023 if I were to believe the status of the GitHub issue I was tracking, so there is still hope! Everything else I tried seemed even worse.

Eventually I ended up embracing the Dark Side of using Electron-likes. But using Electron directly in .NET means the fact you have three runtimes running at the same time: the .NET one, the Node one, and the Chromium one. This is at least one runtime too many, and partially explains huge RAM usage.

Electron also has the problem of "we're shipping the web browser, a program with so much attack surface that bugs have to be frequently patched, and our update channel is very likely way worse than the browser's update channel".

My current approach to these is using a library that provides a Webview delegated to each respective platform's Webview control, which means we don't have to ship anything: WebView2 (Chromium Edge) on Windows and libwebkit2gtk on Linux and macOS. My memory usage for a program I was writing increased from 200MB (WPF on Windows) to 250MB (Webview2 on Windows), which I found acceptable.

There's also the "do we really have to use a web browser for GUI", but as far as I can see, in my experience, GUI programs tend to grow bigger and bigger until they either eventually end up needing functionality of a web browser (say, Markdown preview in whatever is your favourite IDE, OAuth authentication to your email provider in your desktop email client, payment gateways in Steam), so as a result they either bundle a Webview control or they reinvent a web browser badly.

The funniest thing is that it's probably the closest way to Microsoft providing a cross-platform GUI too: Blazor exists, so that Webview could very likely end up displaying a GUI made in C#.

Rambling About C# Being Alright

I think C# is an alright language. This is one of the highest distinctions I can give to a language.

Warning: This post is verbose and rambly and probably only good at telling you why someone might like C# and not much else.

~~~

There's something I hate about every other language. Worst, there's things I hate about other languages that I know will never get better. Even worse, some of those things ALSO feel like unforced errors.

With C# there's a few things I dislike or that are missing. C#'s feature set does not obviously excel at anything, but it avoids making any huge misstep in things I care about. Nothing in C# makes me feel like the language designer has personally harmed me.

C# is a very tolerable language.

C# is multi-paradigm.

C# is the Full Middle Malcomist language.

C# will try to not hurt you.

A good way to describe C# is "what if Java sucked less". This, of course, already sounds unappealing to many, but that's alright. I'm not trying to gas it up too much here.

C# has sins, but let's try to put them into some context here and perhaps the reason why I'm posting will become more obvious:

C# didn't try to avoid generics and then implement them in a way that is very limiting (cough Go).

C# doesn't hamstring your ability to have statement lambdas because the language designer dislikes them and also because the language designer decided to have semantic whitespace making statement lambdas harder to deal with (cough Python).

C# doesn't require you to explicitly wrap value types into reference types so you can put value types into collections (cough Java).

C# doesn't ruin your ability to interact with memory efficiently because it forbids you from creating custom value types, ergo everything goes to the heap (cough cough Java, Minecraft).

C# doesn't have insane implicit type coercions that have become the subject of language design comedy (cough JavaScript).

C# doesn't keep privacy accessors as a suggestion and has the developers pinkie swear about it instead of actually enforcing it (cough cough Python).

Plainly put, a lot of the time I find C# to be alright by process of elimination. I'm not trying to shit on your favorite language. Everyone has different things they find tolerable. I have the Buddha nature so I wish for all things to find their tolerable language.

I do also think that C# is notable for being a mainstream language (aka not Haskell) that has a smaller amount of egregious mistakes, quirks and Faustian bargains.

The Typerrrrr

C# is statically typed, but the typing is largely effortless to navigate unlike something like Rust, and the GC gives a greater degree of safety than something like C++.

Of course, the typing being easy to work it also makes it less safe than Rust. But this is an appropriate trade-off for certain kinds of applications, especially considering that C# is memory safe by virtue of running on a VM. Don't come at me, I'm a Rust respecter!!

You know how some people talk about Python being amazing for prototyping? That's how I feel about C#. No matter how much time I would dedicate to Python, C# would still be a more productive language for me. The type system would genuinely make me faster for the vast majority of cases. Of course Python has gradual typing now, so any comparison gets more difficult when you consider that. But what I'm trying to say is that I never understood the idea that doing away entirely with static typing is good for fast iteration.

Also yes, C# can be used as a repl. Leave me alone with your repls. Also, while the debugger is active you can also evaluate arbitrary code within the current scope.

I think that going full dynamic typing is a mistake in almost every situation. The fact that C# doesn't do that already puts it above other languages for me. This stance on typing is controversial, but it's my opinion that is really shouldn't be. And the wind has constantly been blowing towards adding gradual typing to dynamic languages.

The modest typing capabilities C# coupled with OOP and inheritance lets you create pretty awful OOP slop. But that's whatever. At work we use inheritance in very few places where it results in neat code reuse, and then it's just mostly interfaces getting implemented.

C#'s typing and generic system is powerful enough to offer you a plethora of super-ergonomic collection transformation methods via the LINQ library. There's a lot of functional-style programming you can do with that. You know, map, filter, reduce, that stuff?

Even if you make a completely new collection type, if it implements IEnumerable<T> it will benefit from LINQ automatically. Every language these days has something like this, but it's so ridiculously easy to use in C#. Coupled with how C# lets you (1) easily define immutable data types, (2) explicitly control access to struct or class members, (3) do pattern matching, you can end up with code that flows really well.

A Friendly Kitchen Sink

Some people have described C#'s feature set as bloated. It is getting some syntactic diversity which makes it a bit harder to read someone else's code. But it doesn't make C# harder to learn, since it takes roughly the same amount of effort to get to a point where you can be effective in it.

Most of the more specific features can be effortlessly ignored. The ones that can't be effortlessly ignored tend to bring something genuinely useful to the language -- such as tuples and destructuring. Tuples have their own syntax, the syntax is pretty intuitive, but the first time you run into it, you will have to do a bit of learning.

C# has an immense amount of small features meant to make the language more ergonomic. They're too numerous to mention and they just keep getting added.

I'd like to draw attention to some features not because they're the most important but rather because it feels like they communicate the "personality" of C#. Not sure what level of detail was appropriate, so feel free to skim.

Stricter Null Handling. If you think not having to explicitly deal with null is the billion dollar mistake, then C# tries to fix a bit of the problem by allowing you to enable a strict context where you have to explicitly tell it that something can be null, otherwise it will assume that the possibility of a reference type being null is an error. It's a bit more complicated than that, but it definitely helps with safety around nullability.

Default Interface Implementation. A problem in C# which drives usage of inheritance is that with just interfaces there is no way to reuse code outside of passing function pointers. A lot of people don't get this and think that inheritance is just used because other people are stupid or something. If you have a couple of methods that would be implemented exactly the same for classes 1 through 99, but somewhat differently for classes 100 through 110, then without inheritance you're fucked. A much better way would be Rust's trait system, but for that to work you need really powerful generics, so it's too different of a path for C# to trod it. Instead what C# did was make it so that you can write an implementation for methods declared in an interface, as long as that implementation only uses members defined in the interface (this makes sense, why would it have access to anything else?). So now you can have a default implementation for the 1 through 99 case and save some of your sanity. Of course, it's not a panacea, if the implementation of the method requires access to the internal state of the 1 through 99 case, default interface implementation won't save you. But it can still make it easier via some techniques I won't get into. The important part is that default interface implementation allows code reuse and reduces reasons to use inheritance.

Performance Optimization. C# has a plethora of features regarding that. Most of which will never be encountered by the average programmer. Examples: (1) stackalloc - forcibly allocate reference types to the stack if you know they won't outlive the current scope. (2) Specialized APIs for avoiding memory allocations in happy paths. (3) Lazy initialization APIs. (4) APIs for dealing with memory more directly that allow high performance when interoping with C/C++ while still keeping a degree of safety.

Fine Control Over Async Runtime. C# lets you write your own... async builder and scheduler? It's a bit esoteric and hard to describe. But basically all the functionality of async/await that does magic under the hood? You can override that magic to do some very specific things that you'll rarely need. Unity3D takes advantage of this in order to allow async/await to work on WASM even though it is a single-threaded environment. It implements a cooperative scheduler so the program doesn't immediately freeze the moment you do await in a single-threaded environment. Most people don't know this capability exists and it doesn't affect them.

Tremendous Amount Of Synchronization Primitives and API. This ones does actually make multithreaded code harder to deal with, but basically C# erred a lot in favor of having many different ways to do multithreading because they wanted to suit different usecases. Most people just deal with idiomatic async/await code, but a very small minority of C# coders deal with locks, atomics, semaphores, mutex, monitors, interlocked, spin waiting etc. They knew they couldn't make this shit safe, so they tried to at least let you have ready-made options for your specific use case, even if it causes some balkanization.

Shortly Begging For Tagged Unions

What I miss from C# is more powerful generic bounds/constraints and tagged unions (or sum types or discriminated unions or type unions or any of the other 5 names this concept has).

The generic constraints you can use in C# are anemic and combined with the lack of tagged unions this is rather painful at times.

I remember seeing Microsoft devs saying they don't see enough of a usecase for tagged unions. I've at times wanted to strangle certain people. These two facts are related to one another.

My stance is that if you think your language doesn't need or benefit from tagged unions, either your language is very weird, or, more likely you're out of your goddamn mind. You are making me do really stupid things every time I need to represent a structure that can EITHER have a value of type A or a value of type B.

But I think C# will eventually get tagged unions. There's a proposal for it here. I would be overjoyed if it got implemented. It seems like it's been getting traction.

Also there was an entire section on unchecked exceptions that I removed because it wasn't interesting enough. Yes, C# could probably have checked exceptions and it didn't and it's a mistake. But ultimately it doesn't seem to have caused any make-or-break in a comparison with Java, which has them. They'd all be better off with returning an Error<T>. Short story is that the consequences of unchecked exceptions have been highly tolerable in practice.

Ecosystem State & FOSSness

C# is better than ever and the tooling ecosystem is better than ever. This is true of almost every language, but I think C# receives a rather high amount of improvements per version. Additionally the FOSS story is at its peak.

Roslyn, the bedrock of the toolchain, the compiler and analysis provider, is under MIT license. The fact that it does analysis as well is important, because this means you can use the wealth of Roslyn analyzers to do linting.

If your FOSS tooling lets you compile but you don't get any checking as you type, then your development experience is wildly substandard.

A lot of stupid crap with cross-platform compilation that used to be confusing or difficult is now rather easy to deal with. It's basically as easy as (1) use NET Core, (2) tell dotnet to build for Linux. These steps take no extra effort and the first step is the default way to write C# these days.

Dotnet is part of the SDK and contains functionality to create NET Core projects and to use other tools to build said projects. Dotnet is published under MIT, because the whole SDK and runtime are published under MIT.

Yes, the debugger situation is still bad -- there's no FOSS option for it, but this is more because nobody cares enough to go and solve it. Jetbrains proved anyone can do it if they have enough development time, since they wrote a debugger from scratch for their proprietary C# IDE Rider.

Where C# falls flat on its face is the "userspace" ecosystem. Plainly put, because C# is a Microsoft product, people with FOSS inclinations have steered clear of it to such a degree that the packages you have available are not even 10% of what packages a Python user has available, for example. People with FOSS inclinations are generally the people who write packages for your language!!

I guess if you really really hate leftpad, you might think this is a small bonus though.

Where-in I talk about Cross-Platform

The biggest thing the ecosystem has been lacking for me is a package, preferably FOSS, for developing cross-platform applications. Even if it's just cross-platform desktop applications.

Like yes, you can build C# to many platforms, no sweat. The same way you can build Rust to many platforms, some sweat. But if you can't show a good GUI on Linux, then it's not practically-speaking cross-platform for that purpose.

Microsoft has repeatedly done GUI stuff that, predictably, only works on Windows. And yes, Linux desktop is like 4%, but that 4% contains >50% of the people who create packages for your language's ecosystem, almost the exact point I made earlier. If a developer runs Linux and they can't have their app run on Linux, they are not going to touch your language with a ten foot pole for that purpose. I think this largely explains why C#'s ecosystem feels stunted.

The thing is, I'm not actually sure how bad or good the situation is, since most people just don't even try using C# for this usecase. There's a general... ecosystem malaise where few care to use the language for this, chiefly because of the tone that Microsoft set a decade ago. It's sad.

HOWEVER.

Avalonia, A New Hope?

Today we have Avalonia. Avalonia is an open-source framework that lets you build cross-platform applications in C#. It's MIT licensed. It will work on Windows, macOS, Linux, iOS, Android and also somehow in the browser. It seems to this by actually drawing pixels via SkiaSharp (or optionally Direct2D on Windows).

They make money by offering migration services from WPF app to Avalonia. Plus general support.

I can't say how good Avalonia is yet. I've researched a bit and it's not obviously bad, which is distinct from being good. But if it's actually good, this would be a holy grail for the ecosystem:

You could use a statically typed language that is productive for this type of software development to create cross-platform applications that have higher performance than the Electron slop. That's valuable!

This possibility warrants a much higher level of enthusiasm than I've seen, especially within the ecosystem itself. This is an ecosystem that was, for a while, entirely landlocked, only able to make Windows desktop applications.

I cannot overstate how important it is for a language's ecosystem to have a package like this and have it be good. Rust is still missing a good option. Gnome is unpleasant to use and buggy. Falling back to using Electron while writing Rust just seems like a bad joke. A lot of the Rust crates that are neither Electron nor Gnome tend to be really really undercooked.

And now I've actually talked myself into checking out Avalonia... I mean after writing all of that I feel like a charlatan for not having investigated it already.

[amandaroos]

Having trouble with the "by" delegate in Kotlin? Don't forget "getValue" and "setValue" imports.

[jacob-cs]

kotlin delegation ‘by’

https://youtu.be/YogGlRYCfp0?t=285

처음 시작은 위의 코드를 보고 알아 보게 되었다.

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interface delegation에 대하여

https://youtu.be/zfiohSIZtbo

https://youtu.be/JolUNygXu3s

.

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property delegation에 대하여

https://kotlinlang.org/docs/reference/delegated-properties.html

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lazy 에 대하여

https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-lazy/

https://www.youtube.com/watch?v=orUgnUuYW44

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lazyDeferred의 구현 예시 

https://stackoverflow.com/questions/57447027/how-to-refresh-viewmodel-data-using-kotlin-lazy-loading-coroutine

fun <T> lazyDeferred(block: suspend CoroutineScope.() -> T): Lazy<Deferred<T>> {    return lazy {        GlobalScope.async {            block.invoke(this)        }    } }

[voidstarzero]

Delegates in Kotlin

When I started using Kotlin for work last year, I went pretty quickly from uncertainty about whether it deserved the hype to devoted enthusiasm. The syntax does make it much more fun to write than Java, but Kotlin’s real strength is that it lets us out of the mindjail of OOP, in principled and easy-to-use ways.

One of my favourite Kotlin features is delegated properties. These are properties (and/or local variables) that are managed by a delegate class which allows for encapsulating and sharing logic among classes without resorting to inheritance. I generally quite dislike inheritance-based patterns, so being able to conveniently use delegates instead of inheriting from a bunch of interfaces is really nice.

In my work, I’ve found them helpful for implementing properties that apply to only small subsets of the hundreds of children of a particular data class -- subsets whose members otherwise have nothing to do with each other. (No need to create pointlessly deep class hierarchies just to share code.) I recently ran into a situation where I needed to use different parameters to compute the value of a delegated property in different situations. Depending on the details, there are at least a couple of ways to do this in Kotlin, using either the type of the object passed to the delegate, or by using annotations on the property itself.

Targeted delegates

A delegate class must implement getValue (and, for vars, setValue) methods, whose first argument is the object on which the delegate is defined. This can be used to tailor a delegate's behaviour for specific classes. Consider this setup:

open class Example class ExampleChild1 : Example() { val dprop by Delegate() } class ExampleChild2 : Example() { val dprop by Delegate() }

If the Delegate class is defined as follows, then ExampleChild1.dprop will be computed using value 1, while ExampleChild2.dprop, using the default of 0:

import kotlin.reflect.KProperty class Delegate { operator fun getValue(thisRef: Example, property: KProperty<*>): Int { return calculateValue(0) } operator fun getValue(thisRef: ExampleChild1, property: KProperty<*>): Int { return calculateValue(1) } private fun calculateValue(i: Int): Int { TODO() } }

It's a simple example, but the getValue implementations could also extract the value to pass to calculateValue from other data in thisRef instead of using a constant. Note also that if dprop had been defined on Example, this wouldn't work as written. (There are ways to make it work, though...)

Annotating delegated properties

Another approach is to "pass" the values in to the delegate using annotations. This allows the user of the delegate to have more control over the delegate's behaviour and, unlike the previous example, also works in the case where different delegated properties within the same class may need to be computed differently.

Defining a very basic annotation to carry the value is straightforward:

annotation class ExampleAnnotation(val i: Int)

It can then be applied to the delegated properties, and the implementation of Delegate modified accordingly. (For this solution you will need to include kotlin-reflect as a dependency.)

class ExampleChild1 : Example() { @ExampleAnnotation(1) val dprop by Delegate() } class ExampleChild2 : Example() { val dprop by Delegate() }

import kotlin.reflect.KProperty class Delegate { operator fun getValue(thisRef: Example, property: KProperty<*>): Int { return property.annotations .filterIsInstance<ExampleAnnotation>() .firstOrNull() ?.let { ann -> calculateValue(ann.i) } ?: calculateValue(0) } private fun calculateValue(i: Int): Int { TODO() } }

I have a preference for this second method, but like I said, the appropriateness of either approach will likely highly depend on the particular case.

[greatwar-1914]

March 1, 1921 - Kronstadt Rebellion Begins

Pictured - Bourgeois or Bolshevik, all bosses hang!

The Russian Civil War was over. “The last of the hostile armies has been driven from our territory,” Lenin told the Tenth Congress of the Russian Communist Party on March 8, 1921. The Reds had driven Yudenich back from the outskirts of Petrograd, expelled the Black Baron and his White army from Crimea, shot Admiral Kolchak and thrown his body under the ice floes of the Angara River. With the counterrevolutionary threat ended, the Bolsheviks marched on the breakaway states of the Russian Empire, like Poland and Georgia. Tiflis, modern-day Tbilisi, fell on February 25. Lenin claimed that the “regathering of the Russian lands” was finished. It is therefore ironic that the last and greatest threat to Bolshevik power came now, at Lenin’s apparent moment of triumph, in Petrograd rather than the provinces, and not from the political Right, but from the Left.

During the October Revolution and the civil war, the Bolsheviks had found their vanguard in the black-jacketed sailors of Kronstadt, the naval fortress on Kotlin Island in the Gulf of Finland twenty miles west of Petrograd, which guarded the city by sea. In Tsarist Russia, where sailors were banned from streetcars and forbidden from walking on “the sunny side of the street,” among other indignities, Kronstadt had long been a hotbed of revolutionary sentiment. The sailors had joined with striking workers in 1905, and again in 1910. In 1917 they massacred their officers and helped storm the Winter Palace, before serving as an elite unit on battlefields throughout Russia.

By 1921, however, the sailors’ revolutionary commitment had pushed them away from the Bolshevik Party. The constant withering of democracy during the war had caused party membership on Kronstadt to plummet. Meanwhile, the Russian economy had collapsed, and famine had become so widespread throughout Russia that reports of cannibalism were not uncommon. Coal shipments to Kronstadt had virtually ceased, and the sailors grew enraged as they sat in the cold and read letters from their families detailing starvation brought on by Bolshevik requisitioning.

The fury against injustice and inequality that had toppled the Tsar and Kerensky now threatened to do the same to Lenin. Across the bay in Petrograd, mill-workers went on strike, demanding that the Bolsheviks “answer before the representatives of the people for their deceit.“ The brutal handling of the strikers compelled the sailors to meet on February 28 onboard the deck of a battleship, presided over by a bright young Ukrainian sailor named Stepan Petrichenko. They formulated their own set of principles for Russia, including freedom of speech and assembly for peasants and workers, new elections, and equal rations for all. In a mass meeting on March 1 all sixteen thousand members of the garrison voted for the resolution.

It may as well have been a declaration of war. The sailors and gunners of Kronstadt had challenged the Bolshevik Party’s legitimacy, and left alone they threatened to be the spark which could turn the discontent throughout Russia into another wave of revolution. On the evening of March 1 the Bolsheviks arrested a delegation of thirty sailors sent to Petrograd, who were never seen again. The next day the Kronstadt fortress formed a Provisional Revolutionary Committee with Petrichenko as its head.

By the end of the week the headlines of the Kronstadt newspaper Izvestiia trumpeted their demands throughout Russia.

ALL POWER TO THE SOVIETS, NOT TO POLITICAL PARTIES!

DOWN WITH THE COUNTERREVOLUTION FROM THE LEFT AND THE RIGHT!

THE POWER OF THE SOVIETS WILL LIBERATE THE TOILING PEASANTRY FROM THE COMMUNIST YOKE!

                                  VICTORY OR DEATH! 

[today-in-wwi]

Kronstadt Rebellion Crushed

The deck of the Petropavlovsk after the defeat of the rebellion.

March 17 1921, Kronstadt [Kotlin]--The failure of the initial attack on Kronstadt was an embarrassment for the Communists, who on the same day convened their Tenth Party Congress in Moscow.  On March 10, after Trotsky reported on the situation, 320 delegates volunteered to join the fight.  With the spring fast approaching and the ice in the Gulf of Finland threatening to melt, Tukachevsky had to act quickly.

While he prepared another offensive, events moved even quicker at the Congress in Moscow.  Lenin had found himself facing direct threats from Kronstadt, strikes in the major cities, and widespread peasant rebellions, along with internal opposition in the form of the Alexander Shliapnikov and Alexandra Kollontai’s Workers’ Opposition.  The strikes had largely petered out by mid-March, with promises that trade would resume with the countryside and the food situation would improve.  Kronstadt would be crushed by force.  The Workers’ Opposition would be effectively dissolved by a ban on internal Communist Party factions, passed without fanfare on April 16 but which would confirm a dictatorship until Gorbachev.  

The farmers, Lenin chose to mollify.  Food had heretofore been requisitioned from communities in large quantities by the government.  This system was to be turned into a tax, 45% lower than the previous rate, and levied on an individual basis.  Any remaining food could be sold on the open market, and additional incentives were provided to boost production.  What would become the New Economic Policy pleased the farmers who directly benefited, and the city-dwellers whose food worries would be alleviated; it had only taken a betrayal of Communist ideals.  Lenin justified this before the Congress on March 15 by saying that an alliance with the peasants was needed if Communism was to survive in a relatively non-industrialized country like Russia without outside help--but after years of war, there was little opposition to a policy that might bring an end to the conflicts.

The announcement of the land tax also boosted the morale of Tukachevsky’s forces, which had also been reinforced with loyal Communists from around the country.  He began another bombardment of Kronstadt on the afternoon of the 16th, and his infantry attacked across the ice in the wee hours of the 17th.  Casualties were high; over 10,000 (including 15 of the party delegates who had volunteered from Moscow) were felled by the defenders or were lost through holes in the ice.  But shortly before midnight, the Communists had captured the Petropavlovsk and most of the other rebellious ships.  About 8000 of the rebels escaped across the ice to Finland; most of those captured by the Communists were shot or died in a concentration camp on the White Sea.

Sources include: Orlando Figes, A People’s Tragedy; W. Bruce Lincoln, Red Victory.

[fundamentalkotlin]

Basics of Kotlin: Working with collections, generics and delegates

http://static.milosvasic.net/conferences/kotlin_serbia/Basics%20of%20Kotlin%20-%20Working%20with%20collections%20generics%20and%20delegates.pptx

[engel15boyer-blog]

Ark Core Desktop Wallet

Increased blockchain usage is a very good thing, right? ARK is definitely a fairly fresh job aimed at increasing user adoption of blockchain technologies, among other things. Nonetheless, one of the major concepts in the ARK whitepaper is that that they will bring blockchain technological innovation to the masses. They will intend on doing this by simply providing �Practical Solutions regarding Real People� along with Swift Secure Core Technology�. A single way ARK is doing it is by creating a good environment that will let any individual or even company to create their unique wash blockchain in a new couple of minutes. To get this to propagate as immediately and extensively as possible typically the ARK team has place a great emphasis on adding as many coding languages together with blockchains as possible, and providing the very best possible user experience. On this ARK Coin review you will take an in-depth glance at the project as well since the technology together with potential clients for the coin themselves. Increased blockchain usage is definitely the good thing, ideal? ARK is a rather new project aimed at increasing user use connected with blockchain technology, amongst other factors. But, one of the crucial concepts in the ARK whitepaper is that that they will bring blockchain technological innovation to the masses. That they plan on performing that by providing �Practical Services with regard to Authentic People� as very well as Fast Protect Central Technology�. One way ARK is carrying out this can be by means of generating an ecosystem that will allow any individual or maybe business to build their very own standalone blockchain inside of a few minutes. To get this to spread as quickly plus commonly as possible the particular ARK staff has put an emphasis on incorporating like many coding languages and even blockchains as possible, together with providing the best achievable user encounter. In this ARK Coin overview many of us will take an exhaustive look at the venture as well as typically the technologies and prospects for the gold coin itself. Bounce to ?? [hide] 1 ARK Background a couple of How Does ARK Function? 2. 1 Sensible Bridges 2. 2 Option Development Languages 2. 3 Drive Button Deployable Blockchains a few Delegated Proof-of-Stake four ARK Token 5 ARK Charges 6 ARK Functionality several Where to Buy ARK 8 Where to Retailer ARK 9 ARK Use outsourcing for Voting 10 Conclusion ARK History The ARK blockchain was launched in February 2017 by some sort of group regarding 27 member spread over the planet, making regarding a really decentralized workforce. Currently the core staff consists of 17 members. A person of the primary creators, and the current CTO involving ARK, is FOREX TRADING Thoorens, who was likewise some sort of center developer at Lisk just before working about the ARK venture. ARK was modeled greatly upon Bitshares, Lisk plus Crypti, three older tasks all using the Delegated Evidence of Stake (dPoS) general opinion protocol. This is a good different associated with traditional Proof-of-Stake (PoS) comprehensive agreement algorithms. How Make a difference ARK Get the job done? There will be Windows ARk Coin Wallet appearing built into the key ARK ecosystem which can help the venture gain its goal of getting blockchain technology more accessible. All these key features include: SmartBridges Alternative Programming Languages Thrust Button Deployable Blockchains Wise Bridges The Smart Connect notion will be employed by ARK to produce �bridges� involving different opuesto blockchains. In essence ARK can grow to be an intermediary between your blockchains, allowing for transmission concerning disparate chains, and the power to trigger functions on other chains. Even though other jobs have been working on a new equivalent function, this remains a thing that isn�t currently possible. Ark Smart Bridge Overview regarding ARK Smart Bridges. Source: ark. io The seriously great matter is that will SmartBridges can be made it possible for with nothing more in comparison with a bit of value provided simply by ARK. One use advantages of SmartBridges might be through swaps, which in turn could use encoded audience members to determine when a business deal can be an exchange business deal, and then approach those people transactions automatically even though now charging their typical costs. For example, a user could send 100 ARK to their Coinbase pocket, in addition to Coinbase would recognize typically the transfer as a good swap transaction and quickly switch the ARK to ETH before depositing this within the users budget. Alternate Programming Languages The ARK builders were very clear in their purpose to allow development in as numerous coding dialects as achievable, hence which include as many software coders as potential. Currently all of often the right after programming languages happen to be supported by simply ARK: Python Elixer RPC Java . INTERNET Head out PHP/Laravel TypeScript API Nucleid Ruby Swift iOS Symfony Javascript Kotlin Lua Typically the ARK team is definitely also guaranteeing support regarding R, C, Advanced PowerShell, Rust, and C++ is going to soon be available. Press Button Deployable Blockchains This can allow anyone to effortlessly make up the ARK blockchain and create their unique blockchain job. Yes, is considered identical for you to Ethereum, although without typically the cost. And these recently deployed chains will are provided with SmartBridges already entirely functional. Delegated Proof-of-Stake Alternatively than using the controversial proof-of-work consensus procedure, ARK is definitely running with a good Delegated Proof of Stake comprehensive agreement algorithm. This implies no costly components and large electricity consumption is needed, as the ARK network is anchored by means of delegates. Anyone may be a use outside agencies for, yet currently merely 51 people actually become delegates, and these are picked by way of the ARK expression owners through a voting program. Each delegate gets 2 ARK for each one block that they forge, in addition to since blocks are generally cast every single 8 secs all these delegates can make over 200 ARK per moment. ARK token holders may be each allowed one vote for delegate, which costs first ARK. It is likewise possible to unvote your delegate plus vote intended for a different delegate as well as the cost is 1 ARK every time you vote or unvote. The greater ARK tokens presented, the harder powerful and individuals have your say is. Delegated Evidence of Stake Delegate Facts of Stake Case in point. Impression Source. You�ll see that use outsourcing for job hopefuls have written recommendations detailing how they will continue to work to secure the networking create ARK better intended for everyone. 1 well-liked means of obtaining electoral votes is through profit posting. Due to the fact each of the fifty-one delegates receives the praise to get forging new blocks, it is possible for them to share these benefits with those that choose them in a sort of dividend technique. One more popular course with regard to future delegates is to operate a growth project that plots on or improves often the ARK ecosystem, and throughout several cases these delegates present an equity position in the new project, or offer services for cost-free. ARK Expression ARK seemed to be launched in early 2017 with 100 million tokens, and with the recent 8 subsequent block time period there are 15, 700 new ARK created any day. Assuming this specific doesn�t change, ARK has a good decreasing inflation amount, which often is 6. 31% from the first year, but is going to decrease to 4. 02% by the tenth calendar year. This drop is a long way less impressive than that will seen using Ethereum or perhaps Lisk. Typically the 8 next block time is one particular of the quicker amid cryptocurrencies. Ethereum is close up having a 14 second block time, yet Bitcoin offers a 15 minute prevent time. Along with have speedy block times, each prohibit can process 25 orders. While this excellent, often the ARK team has now explained in their whitepaper that they may make this scalable by improving the number of transactions processed by every single block, as well like reducing the block period. ARK Fees The system price for sending ARK to another wallet is 0. 1 ARK, however this specific is designed to transformation as the network increases larger and becomes better. If you wish to register as a delegate it costs 25 ARK, and to vote as well as unvote a delegate charges first ARK. These expenses usually are planned to be reduced together with the next core update, and will then turn out to be just 0. 01 ARK as a network cost for sending, zero. 02 ARK for voting about a delegate, and 10 ARK to register like a assign. All service fees are paid to the particular forging delegate which functions the block containing these fees. ARK Performance As with most cryptocurrencies the particular price of ARK has been heavily influenced by way of its own developmental milestones, but in addition by the price tag of Bitcoin, containing possessed an huge impact in the overall cryptocurrency markets. This particular means we possess seen attracts and valleys in this price of ARK considering the idea had its ICO in 2016. The first raise occurred in 06 2017, if the token hit $1. 2009 after typically the developers released a collection for Java help with the platform. With Coffee being one of often the most popular programming 'languages' the community was clearly enthusiastic by the media and directed price higher accordingly. We can easily envision a good nice spike may happen when languages such as C++ are additional. ARK Gold coin Performance ARK Gold coin Functionality. Source: Coin Promote Hat The next spike took place in Sept. 2010 2017, with often the cost reaching $3. 96 following the ARK team introduced a desktop wallet the fact that resolved many reported bugs in the earlier type of typically the desktop pocket book. The upgrade also included assistance to get Ledger, one of this most famous hardware wallets. The biggest spike got in January 2018 while the entire cryptocurrency marketplace rallied. Price hit $9. 29 at that time, nonetheless that has due to the fact downed rather far, hitting $1. forty one as regarding late August 2018 with the entire cryptocurrency industry under pressure for just about the entire starting regarding 2018. Where to Purchase ARK The largest dealing areas for ARK will be Binance and Bittrex. With Binance each BTC and even ETH are poular stock trading pairs, although Bittrex views mostly BTC trades. ARK also sees trading up Upbit and the biggest trade quantity there is against the Korean Was the winner. There are some scaled-down exchanges supplying ARK, although volumes may be small. Wherever to Store ARK Often the easiest place to retail outlet your ARK is throughout one of several wallets presented upon their internet site. You include three options: Desktop computer Wallet Paper Wallet Internet En aning Wallet The pc finances is a very fine choice as being the design can be quite good together with wonderful is excellent. You could also employ the Ledger hardware pocket book if you�re after a lot more safety. Or for individuals on the go you can find mobile versions of often the ARK wallet for each Android mobile phone and iOS. Each variants are ranked 5-stars, nevertheless to be sure they haven�t acquired numerous reviews to date. ARK Delegate Voting If you happen to be intending on buying and positioning ARK you probably need to vote for some sort of delegate as soon while you get your ARK off the exchange and even with your own wallet. It is just one ARK to perform so, and you can easily use the vote on a good delegate which will pay a person dividends, which should help you recover the cost of voting initially. Or in the event that you prefer you can get some sort of delegate who�s working on a cool project you�d want to support. Voting is effortless. After you have on least 1 ARK inside your wallet simply demand �Votes� tab. As soon as presently there you�ll click �Add Delegate� and you�ll get a new pop-up where you might vote for one regarding the fifty-one existing delegates, or if you love you can easily get into the name associated with one more user you�d like to vote for. Choose a delegate and make sure the checkbox next to your selected use outsourcing for is checked after which simply click �Vote�. Finally you are going to require to enter your passphrase to confirm your election. You are able to change your delegate vote any time, nonetheless an individual will have to give a single ARK each time you do so. Summary The ARK team attempts be building a beneficial resource for that blockchain environment as a whole. They will may possibly not be the particular only assignment trying in order to attach disparate blockchains, but that doesn�t make their particular work any less precious, specially if they ending up making it where other folks neglect. The roadmap getting implemented from the team is quite ambitious, although the fact that simply means if the workforce is successful these people should be wildly productive. Personally I like this type of assignment of which aims to create some sort of useful user interface, plus make blockchain technology attainable by the lots. I could see ARK getting one of the long term survivors in the blockchain revolution.

[jobhuntingsworld]

Android Developer resume in Danbury, CT

#HR #jobopenings #jobs #career #hiring #Jobposting #LinkedIn #Jobvacancy #Jobalert #Openings #Jobsearch Send Your Resume: hr@jumprecruiter.us

Professional Summary

* ***** ** ******* *** software/IT.

* **** ** **** *****.

* **** ******* ** ********/IT within a corporate setting.

Kotlin programming development experience.

Java programming skill.

Develop rich application UIs with strong UXs that follow Android design guidelines.

Hands-on with middleware and integration with different web services and message exchanges (e.g., SOAP, REST, XML, JSON) Experience with all the usual stuff (multi-threading, integration with REST APIs, view animations, custom transitions, multi-threading).

Ability to ask the right questions, provide feedback to stakeholders, break down tasks, and create a plan to achieve the intended result.

Architectures include MVVM, MVP, MVC.

Strong understanding of the Android framework, best practices, and design patterns.

Knowledge and experience using payment gateways/systems.

Apply OOP design patterns such as Façade, Abstract Factory, Builder, Singleton, Observer, Protocols, Delegation, etc.

Keep abreast of industry trends and technologies, being prepared to apply them quickly.

Experience with Android apps with networked data from content management systems.

Experience with Android Media Player API and ExoPlayer in streaming audio and video.

Strong knowledge in Android multithreading frameworks: AsyncTaks, IntentServices, Handlers, Threads, Runnables, Loopers.

Experience using GIT/GitHub for Source Control.

Work with various integrated development environments (IDE)/frameworks, including Dagger2, Bluetooth, Android Studio, Eclipse, Android Annotations, Robotium test framework, Espresso test framework, Mockito, SpongyCastle cipher suites, Jenkins, JUnit unit testing, and Visual Studio App Center.

Experience working with tablets, phones, smart TVs and more recently Android Smart Watches.

Experience with messaging in Android apps.

Practical implementation of Android Life Cycle, Fragments, Intents, Threads on Android, binding services, Implicit and Explicit Intents, background processes, sync adapters, Activity, Activities for Result, WebView, ImageView, TextView, RecyclerView, ListView, etc.

Technical Skills

Android Tools – Push Notifications, Mixpanel, Services, Loaders, Ion, Urban Airship,ORMLite, ButterKnife, MediaPlayer, RxCache, Spork, Runtime, JUnit, ZXing, EventBus, RecyclerView Animator, Mockito, Espresso, CoordinatorLayout, Content Providers, Support Libraries, Robolectric, Retrofit, XmlPullParser, RoboGuice, Glide, Picasso, RxJava, Volley, Gradle, Logger, animations, VidEffects, Retrolambda, MonkeyRunner, Dagger, JobScheduler, GreenDAO, Otto, AndroidAnnotations, Protobuf, Answers, MPAndroidChart

Languages – Java, Kotlin

Authoring IDE – Android Studio, Eclipse

Content Integration – REST, SOAP, JSON, XML, GSON, Jackson, Moshi, Content Providers, Android Media Player API, ExoPlayer for Streaming Audio/Video

Architectures – MVC, MVP, MVVM

Dependency Injection – Hilt, Dagger

Databases – SQLite, SQL, Oracle, Firebase

Team Tools – JIRA, Jenkins, Git, SVN,

Old Android – Intents, Loopers, Loaders, NineOldAndroids, ListView, AsyncTask, Volley

Tuning – Leak Canary

Google – Google Analytics, Google Maps, Google API, Google Cloud Messaging

Professional Android Work Experience

08/2021

– Present

Android Software Application Developer

Union Savings Bank, Danbury, CT

https://play.google.com/store/apps/details?id=com.mfoundry.mb.android.mb_957&hl=en_CA&gl=US

Available to all Union Savings Bank consumer online banking customers. Union Savings Bank Mobile allows you to check balances, make transfers, pay bills, make deposits, and find locations.

Used Hilt for dependency Injection.

Used Postman to interact with client custom APIs.

Implemented recycler views with cardviews to display data in the most efficient way.

Interacted with the whole Jetpack library.

Programmed code in Kotlin language to perform Restful API calls for bank transfers, budgeting, and digital receipts user stories using Coroutines, Retrofit, and Data Binding in MVVM clean code architecture.

Implemented Jetpack Compose to create small reusable composables to describe UI by calling a series of functions that transformed data into a UI hierarchy and defined Data flow principles in Compose.

Refactored Android Support libraries to be compliant with Android 11 and JetPack, such as android.preference to androidx.preference.

Integrated multiple third-party libraries like: Glide, Retrofit, RxJava and Dagger 2.

Used Slack and Microsoft Teams for communication

Implemented Safety Net Attestation API and SafetyNet reCAPTCHA API to determine if it is rooted/tampered, and implemented strong DRM checks and protect app from spam.

Improved login feature of the app using OAuth library for token-based authentication and Biometric API.

Wrote instrumentation tests and UI tests using Espresso.

05/2020

– 08/2021

Android Application Developer

Coldwell Banker Real Estate, Madison, NJ

https://play.google.com/store/apps/details?id=com.myzap.cb&hl=en_CA&gl=US

With the Coldwell Banker® app, you’re not just choosing a home. You’re choosing a lifestyle. We know that’s a big decision. So we bring you the most up-to-date and accurate information on homes in your area, instant updates when new homes hit the market, and details about local neighborhoods – and we connect you with a real estate professional who’s prepared to help you find just what you’re looking for.

Used Jetpack navigation graph, pagination and Jetpack compose to develop view model, view and data domain layers for the tickets to complete full feature development.

Utilized a MVVM architecture using Android Jetpack Components.

Incorporated Facebook SDK and Twitter API for logging, posting and share experiences of the Android app and the service for marketing.

Implemented analytics using Firebase analytics framework to track user behavior in app.

Implemented Google Maps for location search with the Google Location APIs.

Integrated multimedia material and live streaming video, decoding, and playback

Profiled the app using instruments to see performance leaks, memory optimizations and battery use.

Wrote instrumentation tests and UI tests using Espresso.

Ensured code quality writing Unit Tests using JUnit, Mockito and PowerMock frameworks.

Created custom UI components for consistent UX across companies’ internal Android applications and for reusability making the development process faster and smoother.

Created custom libraries for internal network calls for security purposes.

Used recycler views & populated lists to display the lists from database using recycler view adapters as the most efficient method.

Used Bitbucket as the version control tool to commit and update the project from the server.

06/2018

– 05/2020

Android Developer

Prudential Financial – Newark, NJ

https://play.google.com/store/apps/details?id=com.prudential.android.RetirementParticipant&hl=en_CA&gl=US

Take control of your financial future – anywhere, any time with the Prudential app. Enroll in your 401(k) or 403(b) to easily manage your money, track your savings progress, access insights and tips designed to help you achieve financial wellness, and much more.

Generated build on MVVM architectural base.

Worked in Android Studio with Kotlin coding in the development of Android mobile app features and functions.

Added encrypted environment configuration with sessions and user login using SharedPreferences.

Utilized AndroidPlot API in different places to chart multiple data from server.

Implemented Kotlin coroutines to perform asynchronous operations as part of the Network Api layer.

Used Intents and Intent Filters to initiate activities and pass information between Activities and Fragments.

Debugged code to support multiple screen sizes and created multiple layout qualifiers.

Created custom views to reduce project overhead can increase reusability of code in multiple places.

Created push notifications message from Firebase console and debugged message received from Firebase console.

Implemented Kotlin scope functions to perform serialization process and increase readability in the code.

Used Git for version control for managing and integrating source code with other team members.

Modularized the existing customer payment authentication flow and integrated/implemented an additional external SDK which helped authenticate customer’s payment details.

04/2017

– 06/2018

Android Developer

Victoria’s Secret, Columbus, OH

https://play.google.com/store/apps/details?id=com.victoriassecret.vsaa

Welcome to the Victoria’s Secret app, your on-the-go destination for the world’s most famous bras, panties, lingerie, sportswear, swimsuits, beauty, accessories and more.

Implemented new features in Kotlin and converted some existing Java classes to Kotlin.

Implemented observable data patterns using JetPack LiveData to make server data observable.

Participated in code review and reviewed code carefully before approving.

Practiced pair programming as part of collaborative project development/delivery strategy.

Utilized Android SDK and supporting development devices.

Utilized Charles Proxy to understand and detect issues in payload or provide feedback to engineers and QA.

Applied a MVVM architectural base.

Added a new credit card with camera card scanner for quickest checkout, push notifications to alert as soon as sales start and remind when they’re ending.

Included Stripe Billing APIs to create and manage invoices and recurring payments and create fixed-price subscriptions with Elements.

Performed code migration from Java to Kotlin and implemented null safety checks, higher order functions, extension functions, coroutines support and KMM.

Worked with testing libraries and frameworks Junit, Espresso, and Mockito.

Created Repository pattern to abstract connections between local databases and On-Site endpoints.

Created abstract classes to define common behavior across the application and utilizing extension function from Ktx plugin to consolidate common operations like getCurrentTime and parseDate.

Used Coroutines and Schedulers for long running and background tasks.

Integrated with Google Maps.

Encrypted and decrypted the shared preference data with the AndroidX Security Library.

Utilized Room database for shared preferences for storage and caching.

04/2016

– 04/2017

Software Developer

Emerson Electric, St. Louis, MO

Analyzed and interpreted business requirements to define and develop technical requirements.

Programmed in Java and C++.

Wrote scripts using JavaScript.

Modified multiple scripts written in JavaScript.

Wrote new functions and modified existing functions.

Interfaced directly with customer technical personnel to support and service installed systems.

Contributed towards product/process improvements, both from a technical perspective and user experience/functional perspective.

Supported post-implementation issue resolution and deployment within the production environment.

Established communications interfacing between software programs and database backends.

Education

Kettering University (Bachelor’s in Computer Science)

Contact this candidate

Apply Now

[appdevelopmentcompanydallas]

The Best Web Development Company Dallas Tx

App Development Company in Dallas, USA

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Our Comprehensive Guide to App Development

The main Dallas compact App development Company Dallas is here to offer you a broad assortment of application development organizations. We promise to help you with building an immovable high-level beginning stage for your business. You can give a connecting stage to your vested party to enjoy and participate in your organization. Along these lines, here is a concise glance at our organized cycle featuring the solace our flexible app fashioners Dallas provide for our regarded clients.

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The clearest advantage is that it's 'custom'. Along these lines, it will in general be uniquely crafted to oblige your strength and wrap whole work processes obvious for the business. Work cycles can be thought of and, shockingly, the client's own tendencies can be coordinated, be that as it may, there are similarly essentially more benefits.

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Without a doubt, even a little bungle can demolish your whole app effort. To ensure your app is freed from any particular configuration that messes up, our gifted analyzers direct various tests with outstandingly advanced testing instruments.

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Our App Development Company Dallas Strategy for the most part revolves around making Android apps adaptable. If your Android app isn't flexible, it could forget to deal with the expanded client informational index, as the amount of Android clients is expanding at a quick speed. We understand just flexibility isn't enough for any app to get a win in the serious market. Subsequently, we moreover develop the right procedure to make your app a visual treat for your clients. To make your app straightforward and incorporate rich, we use the Android SDK stage and Android Development Tools.

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The demeanor of its task will live in the programming language used. These are the tongues of PHP, Python, Java, Kotlin, Go, and Ruby. This simplifies it to store email addresses, passwords, profiles, or thin sheets. It will in like manner be essential to use frameworks (structures in French) like Cake PHP, spring, Symfony, or Code Igniter. The planner who is liable for it ought to foster cooperation with various accomplices in solicitation to ensure a smooth and dependable action of the apparatus consequently made. In a way, it is the foundation of development and will facilitate movements of every sort. He will plan the server that has the app. As you will grasp, unlike Front-End development, the work performed on the Back-end isn't recognizable yet conditions all the plan of business rules.

Neighborhood App Development

The neighborhood adaptable application is written in the specific language of the phone. Like Java for Android and Swift for iOS, or Flutter usable for both! Direct induction to all of the features that your wireless can offer (GPS, Camera, Virtual Reality, Notification, SMS, etc.). No show setback between the application and the use of iOS/Android SDK.

Hybrid App Development

Hybrid designs don't use the language planned for the Android or iOS cell. For example, React Native purposes JavaScript to make cross-stage convenient applications, considering the React library, made by Facebook for web interface creation. This allows the web specialist to make applications.

[dolphinfox417]

Compile C Program In Dosing

Compile C Program In Dosing Chart

The IntelliJ IDEA compilation and building process compiles source files and brings together external libraries, properties files, and configurations to produce a living application. IntelliJ IDEA uses a compiler that works according to the Java specification.

You can compile a single file, use the incremental build for a module or a project, and rebuild a project from scratch.

If you have a pure Java or a Kotlin project we recommend that you use IntelliJ IDEA to build your project since IntelliJ IDEA supports the incremental build which significantly speeds up the building process.

However, IntelliJ IDEA native builder might not correctly build the Gradle or Maven project if its build script file uses custom plugins or tasks. In this case, the build delegation to Gradle or Maven can help you build your project correctly.

The compiler’s output code performance is also noticeably poorer than GCC, Clang, and Visual C. It’s definitely a less mature compiler. It outputs CodeView debugging information, so GDB is of no use. The best solution is to simply use the compiler built into the IDE, which can be invoked directly from the command line.

Options Controlling C Dialect. The following options control the dialect of C that the compiler accepts:-ansi. Support all ISO C89 programs. This turns off certain features of GCC that are incompatible with ISO C89, such as the asm and typeof keywords, and some predefined macros that identify the type of system you are using.

USING AND LINKING LIBRARY CODE To use a Library that is not linked into your program automatically by the compiler, you need to (1) include the library's header file in your C source file (test.c in the example below), and (2) tell the compiler to link in the code from the library.o file into your executable file: step 1: Add an include line (#include 'somelib.h') in a program source file (e.

The break command sets or clears extended CTRL+C checking on DOS systems. Call: The call command is used to run a script or batch program from within another script or batch program. The call command has no effect outside of a script or batch file. In other words, running the call command at the MS-DOS prompt will do nothing.

Create the Makefile for a Simple Compilation. Let us assume that you have the sample C.

Compile a single file or class

Open the needed file in the editor and from the main menu, select Build | Recompile 'class name' (Ctrl+Shift+F9 ).

Alternatively, in the Project tool window, right-click the class you need and from the context menu, select Recompile 'class name'.

If errors occur during the compilation process, IntelliJ IDEA will display them in the Review compilation and build output along with warning messages.

Change the compilation output locations

When you compile your source code, IntelliJ IDEA automatically creates an output directory that contains compiled .class files.

Inside the output directory, IntelliJ IDEA also creates subdirectories for each of your modules.

The default paths for subdirectories are as follows:

Sources:<ProjectFolder>/out/production/<ModuleName>

Tests:<ProjectFolder>/out/test/<ModuleName>

At the project level, you can change the <ProjectFolder>/out part of the output path. If you do so (say, specify some <OutputFolder> instead of <ProjectFolder>/out) but don't redefine the paths at the module level, the compilation results will go to <OutputFolder>/production/<ModuleName> and <OutputFolder>/test/<ModuleName>. Alfred powerpack license code free fire.

At the module level, you can specify any desirable compilation output location for the module sources and tests individually.

Specify compilation output folders

Open the Project Structure dialog (File | Project StructureCtrl+Alt+Shift+S 3utools backup tab greyed out video. ).

In Project Settings, select Project and in the Project compiler output field, specify the corresponding path.

For modules, select Modules, the module you need and the Paths tab. Change the location of the output folder under the Compiler output section.

Build

When you execute the Build command, IntelliJ IDEA compiles all the classes inside your build target and places them inside the output directory.

When you change any class inside the build target and then execute the build action, IntelliJ IDEA performs the incremental build that compiles only the changed classes. IntelliJ IDEA also recursively builds the classes' dependencies.

Build a module, or a project

Select a module or a project you want to compile and from the main menu, select Build | Build Project (Ctrl+F9 ).

IntelliJ IDEA displays the compilation results in the Review compilation and build output.

If you add a module dependency to your primary module and build the module, IntelliJ IDEA builds the dependent module as well and displays it in the output directory alongside the primary one. If the dependent module has its own module dependencies, then IntelliJ IDEA compiles all of them recursively starting with the least dependent module.

The way the module dependencies are ordered may be very important for the compilation to succeed. If any two JAR files contain classes with the same name, the IntelliJ IDEA compiler will use the classes from the first JAR file it locates in the classpath.

For more information, see Module dependencies.

Rebuild

When you execute a rebuild command, IntelliJ IDEA cleans out the entire output directory, deletes the build caches and builds a project, or a module from scratch. It might be helpful, when the classpath entries have changed. For example, SDKs or libraries that the project uses are added, removed or altered.

Rebuild a module, or a project

From the main menu, select Build | Rebuild Project for the entire project or Build | Rebuild 'module name' for the module rebuild.

IntelliJ IDEA displays the build results in the Review compilation and build output.

When the Rebuild Project action is delegated to Gradle or Maven, IntelliJ IDEA doesn't include the clean task/goal when rebuilding a project. If you need, you can execute the clean command before the rebuild using the Execute Before Rebuild option in the Gradle or Maven tool window.

Background compilation (auto-build)

You can configure IntelliJ IDEA to build your project automatically, every time you make changes to it. The results of the background compilation are displayed in the Problems tool window.

Configure the background compilation

Press Ctrl+Alt+S to open IDE settings and select Build, Execution, Deployment | Compiler.

On the Compiler page, select Build project automatically.

Now when you make changes in the class files, IntelliJ IDEA automatically performs the incremental build of the project.

The automatic build also gets triggered when you save the file (Ctrl+S) or when you have the Save files automatically if application is idle for N sec. option selected in the System settings dialog.

When you have the Power Save Mode option (File | Power Save Mode) enabled in your project, the auto-build action is disabled, and you need to manually run the build (Ctrl+F9 ).

Compile before running

By default, when you run an application, IntelliJ IDEA compiles the module where the classes you are trying to run are located.

If you want to change that behavior, you can do so in the Run/Debug Configurations dialog.

Configure a run/debug configuration

From the main menu, select Run | Edit Configurations.

In the dialog that opens, create a new or open an existing run configuration.

In the Before Launch section, select the Build option and click to disable it.

If you need to add a new configuration action, click and from the list that opens, select the desired option.

For example, if you select Build Project then IntelliJ IDEA will build the whole project before the run. In this case, the dependencies that for some reason were not included in the build with the Build action, will be accounted for. If you select the Build, no error check option, IntelliJ IDEA will run the application even if there are errors in the compilation results.

Review compilation and build output

IntelliJ IDEA reports compilation and building results in the Build tool window, which displays messages about errors and warnings as well as successful steps of compilation.

If you configured an auto-build, then IntelliJ IDEA uses the Problems tool window for messages. The window is available even if the build was executed successfully. To open it, click Auto-build on the status bar.

Double-click a message to jump to the problem in the source code. If you need to adjust the compiler settings, click .

Package an application into a JAR

When the code is compiled and ready, you can package your application in a Java archive (JAR) to share it with other developers. A built Java archive is called an artifact.

Create an artifact configuration for the JAR

From the main menu, select File | Project StructureCtrl+Alt+Shift+S and click Artifacts.

Click , point to JAR, and select From modules with dependencies.

To the right of the Main Class field, click and select the main class in the dialog that opens (for example, HelloWorld (com.example.helloworld) ).

IntelliJ IDEA creates the artifact configuration and shows its settings in the right-hand part of the Project Structure dialog.

Apply the changes and close the dialog.

Build the JAR artifact

From the main menu, select Build | Build Artifacts.

Point to the created .jar (HelloWorld:jar) and select Build.

If you now look at the out/artifacts folder, you'll find your .jar file there.

Run a packaged JAR

To run a Java application packaged in a JAR, IntelliJ IDEA allows you to create a dedicated run configuration.

If you have a Gradle project, use Gradle to create and run the JAR file.

For Maven projects, you can use IntelliJ IDEA to run the JAR file. If you have a Spring Boot Maven project, refer to the Spring section.

Create a run configuration

Press Ctrl+Shift+A, find and run the Edit Configurations action.

In the Run/Debug Configurations dialog, click and select JAR Application.

Add a name for the new configuration.

In the Path to JAR field, click and specify the path to the JAR file on your computer.

Under Before launch, click , select Build Artifacts in the dialog that opens.

Doing this means that the JAR is built automatically every time you execute the run configuration.

Run configurations allow you to define how you want to run your application, with which arguments and options. You can have multiple run configurations for the same application, each with its own settings.

Execute the run configuration

On the toolbar, select the created configuration and click to the right of the run configuration selector. Alternatively, press Shift+F10 if you prefer shortcuts.

As before, the Run tool window opens and shows you the application output.

Compile C Program In Dosing Chart

If the process has exited successfully, then the application is packaged correctly.

[jacob-cs]

kotlin by lazy , Lazy

Lazy class 공식 문서

https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-lazy/

Delegated Properties

by

https://kotlinlang.org/docs/reference/delegated-properties.html

lazy와 lateinit 에 관하여

https://stackoverflow.com/a/36623703/3151712

Delegated Properties lazy

https://kotlinlang.org/docs/reference/delegated-properties.html#lazy