JavaScript ゲームのための単純な 2D 物理エンジンを作成するIBM Developer is your one-stop location for getting hands-on training and learning in-demand skills on relevant technologies such as generative AI, data science, AI, and open source.
JavaScript tests on your Continous Integration server
A modern web page does a lot of things, hence the term web application has become more commonly used over the last year. A consequence of this is that we are crafting widgets and entire modules using JavaScript, or at least in some language that eventually ends up being “compiled” to JavaScript. Where there is code there should also be tests. And the tests need to go green every time the code is c
A Worker-Owned Tech Consultancy - Bocoup
Third-Party JavaScript Development: The Future!Posted by Mike Pennisi I’ve just returned from the future, and I have a lot to share with you. World news, sports scores, market changes, all that stuff can wait. First, we need to talk about third-party JavaScript. There’s a great deal of browser technology on the way that will affect the way you write code. Here, I’ll focus specifically on tech that
A Worker-Owned Tech Consultancy - Bocoup
JavaScript: Databinding with Object.observePosted by Rick Waldron Everything you think you know about data binding — and every trick MVC libraries are using to pull it off — is about to be flipped on its head. At the last ECMA/TC39 Face to Face, Rafael Weinstein presented the latest revision of the Object.observe spec, a work in progress that he and several other members of TC39 are currently auth
X-Tag - Web Components Custom Element Polylib
X-Tag is a small JavaScript library, created and supported by Mozilla, that brings Web Components Custom Element capabilities to all modern browsers. X-Tag Technology Stack X-Tag allows you to easily create elements to encapsulate common behavior or use existing custom elements to quickly get the behavior you're looking for. For example, check out Brick, which contains 14 custom elements optimized
Asynchronous JS: Callbacks, Listeners, Control Flow Libs and Promises - Sebastian's Blog
When it comes to dealing with asynchronous development in JavaScript there are many tool you can use. This post explains four of these tools and what their advantages are. These are Callbacks, Listeners, Control Flow Libraries and Promises. Example Scenario To illustrate the use of these four tools, let’s create a simple example scenario. Let’s say that we want to find some records, then process t
Promises are the monad of asynchronous programming – The If Works
In my introduction to monads in JavaScript we saw a couple of monads and examined the commonality between them to expose an underlying design pattern. Before I get on to how that applies to asynchronous programming we need to take one final diversion and discuss polymorphism. Consider the list monad that we implemented before: var compose = function(f, g) { return function(x) { return f(g(x)) }; }
Retrieving binary file content using Javascript, base64 encode it and reverse-decode it using Python
I'm trying to download a binary file using XMLHttpRequest (using a recent Webkit) and base64-encode its contents using this simple function: function getBinary(file){ var xhr = new XMLHttpRequest(); xhr.open("GET", file, false); xhr.overrideMimeType("text/plain; charset=x-user-defined"); xhr.send(null); return xhr.responseText; } function base64encode(binary) { return btoa(unescape(encodeURICompon
Is there a limit to the length of HTML attributes?
How long is too long for an attribute value in HTML? I'm using HTML5 style data attributes (data-foo="bar") in a new application, and in one place it would be really handy to store a fair whack of data (upwards of 100 characters). While I suspect that this amount is fine, it raises the question of how much is too much?
Elm - delightful language for reliable web applications
Elm uses type inference to detect corner cases and give friendly hints. NoRedInk switched to Elm about four years ago, and 300k+ lines later, they still have not had to scramble to fix a confusing runtime exception in production. Learn more. -- TYPE MISMATCH ---------------------------- Main.elm The 1st argument to `drop` is not what I expect: 8| List.drop (String.toInt userInput) [1,2,3,4,5,6] ^^
Typed arrays - Binary data in the browser | Articles | web.dev
Introduction Typed Arrays are a relatively recent addition to browsers, born out of the need to have an efficient way to handle binary data in WebGL. A Typed Array is a slab of memory with a typed view into it, much like how arrays work in C. Because a Typed Array is backed by raw memory, the JavaScript engine can pass the memory directly to native libraries without having to painstakingly convert
GitHub - jDataView/jDataView: DataView. Extended. Anywhere.
There are three ways to read a binary file from the browser. The first one is to download the file through XHR with charset=x-user-defined. You get the file as a String, convert it to byte Array and you have to rewrite all the decoding and encoding functions (getUint16, getFloat32, ...). All the browsers support this. Then browsers that implemented Canvas also added CanvasPixelArray as part of Ima
RxJS Reactive Extensions for JavaScript
RxJS Download ZIP Download TAR View On GitHub This project is maintained by Reactive-Extensions Clean Declarative Code What is RxJS? aka Reactive Extensions for JavaScript. RxJS a library for composing asynchronous and event-based programs using observable sequences and LINQ-style query operators. Using Rx, you can represent asynchronous data streams with Observables and much more. RxJS provides e
neue cc - Reactive Extensions for JavaScript
MIX10終了しましたねー。何はともかく皆してIE9の話題ばかりで、ああ、InternetExplorerは愛されてるなあ（色々な意味で）、などというのを横目に、私にとっての最大のニュースはReactive Extensions for JavaScript(RxJS)です。Reactive Extensions(Rx)はこのサイトでもカテゴリーを作ってメソッド探訪なんてやってるぐらいに注目していたわけで、当然MIX10でJavaScript版出すという話を聞いた時からwktkが止まらなかったわけですが、全く期待を裏切らなかった！というか、こいつはヤバいですよ？ Reactive Extensionsとは何ぞや、というと、LinqというC#の関数型言語みたいなリスト処理ライブラリ(語弊ありまくり)のイベントとか非同期版です。イベントや非同期処理にたいしてmapとかfilterとかfoldと
jQuery で HTTP 接続するときの書き方: Days on the Moon
12 月 13 日に Kyoto.js の第 3 回 meetup で、「jQuery で HTTP 接続するときの書き方」と題した 5 分間のライトニングトークを行いました。以下にその内容を一部再構成して収録します。 こんにちは、nanto_vi です。今日は jQuery で HTTP 接続をするときの書き方について話します。 皆さん jQuery を使うことも多いかと思います。jQuery で HTTP 接続をするとき、古いサンプルだと次のような書き方が載っています。 $.ajax({ url: '/foo/bar', data: { baz: 'qux' }, success: function (data) { console.log(data); }, }); 接続完了時の処理をコールバック関数として $.ajax() に渡してやる形ですね。しかし、現在この書き方は非推奨となっ
What Is Web Performance Monitoring and Why Does It Matter? - syzygy.st
Web performance monitoring is the process of tracking and analyzing the speed, uptime, and overall performance of a website to ensure an optimal user experience. In today’s fast-paced digital world, a slow or unreliable website can drive visitors away, hurt search engine rankings, and lead to lost revenue. That’s why businesses of all sizes must take web performance monitoring seriously. What Is W
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AngularUI for AngularJS
idiomatic.js/translations/ja_JP at master · rwaldron/idiomatic.js
GitHub - domenic/promise-tests: DEPRECATED: use https://github.com/promises-aplus/promises-tests instead!
GitHub - inexorabletash/text-encoding: Polyfill for the Encoding Living Standard's API
