Tom Black — Ruby on WebAssembly
日本語で読む 🇯🇵 TL;DR: WebAssembly is here! Already familiar with it? Check out the wasm gem to get started. Welcome to 2018, where some of the most exciting innovations are happening in the compiler space. Sure, there’s things like AR, VR, and machine learning on the bleeding edge, but don’t discount those technologies as old as computing itself, the software responsible for translating the source co
WebUSBでFeliCaの一意なIDであるIDmを読む - Qiita
概要 Suica、PASMO、おサイフケータイに代表されるFeliCaカードには一意のIDとしてIDmという数値が割り当てられている。USB接続のFeliCaリーダーを使ってそいつを読む。 デモ デモページはこちら→ https://saturday06.github.io/webusb-felica/demo.html 注意：チャージ済みだったり、オートチャージが有効なカードでは絶対に実験しないでください。勝手に決済が発生してお金が無くなっても責任はとれません。 ソースはこちら https://github.com/saturday06/webusb-felica/blob/gh-pages/demo.html だいたい、下記のような感じで送受信関数を作っておいて async function send(device, data) { let uint8a = new Uint8Arra
GitHub - jbreeden/rubium: A Chromium shell for MRuby applications
Here is an example rubium app I call mruby-edit. It's a code editor written entirely in Ruby - including all DOM event handlers and manipulations. It's implemented on top of Ace, but uses Ruby to configure Ace keybindings, and access the file system. In the image, mruby-edit is viewing its own source code. Mruby-edit was written entirely in Ruby as a proof of concept, but you can freely switch bet
AWS IoTのMQTT over WebSocketにHTMLから接続してみた | DevelopersIO
上記のうち、Paho JavaScript ClientについてはCDNによる提供がありません。 Paho JavaScript Clientの Download から mqttws31.js をダウンロードしておいてください。 サンプルコード <html lang="ja"> <body> <ul id="chat"> <li v-for="m in messages">{{ m }}</li> </ul> <input type="text" name="say" id="say" placeholder="Input a message here..."> <button id="send">Send</button> <script src="https://cdnjs.cloudflare.com/ajax/libs/vue/1.0.16/vue.min.js" type="te
runtime.js — JavaScript library OS
Wouldn’t it be cool to use the operating system as a regular application dependency you can simply require()? How is this possible?If you’re following the news about cloud computing and operating systems, you may have heard about the library operating systems or unikernels. Huh, sounds like unicorns, but they’re actually the kind of specialized operating systems that are packaged into libraries th
supervisor配下でcluster.jsを動かすためのTips - アルパカDiary Pro
現在nodeアプリケーションをsupervisordでデーモン管理しているのですが、 こいつをcluster.jsでマルチコア対応したところ デーモン管理から外れてしまうという現象が発生しました。 発生する小さなスクリプト var cluster = require('cluster'); var numCPUs = require('os').cpus().length; if (cluster.isMaster) { // Fork workers. for (var i = 0; i < numCPUs; i++) { cluster.fork(); } } else { app = require('./app'); } このスクリプトで supervisorctl stop すると 子プロセスが落ちないでデーモンとして残ってしまう。 Google先生に聞いてみたところ マスタープ
JavaScript engine for Internet of Things
JerryScript is a very lightweight JavaScript engine with capability to run on microcontrollers with less then 8KB of RAM. JerryScript is the lightweight JavaScript engine intended to run on a very constrained devices such as microcontrollers: Only few kilobytes of RAM available to the engine (<64 KB RAM) Constrained ROM space for the code of the engine (<200 KB ROM) The engine supports on-device c
Meta programming with ECMAScript 6 proxies
This blog post is outdated. Please read chapter “Metaprogramming with proxies” in “Exploring ES6”. This blog post explains the ECMAScript 6 (ES6) feature proxies. Proxies enable you to intercept and customize operations performed on objects (such as getting properties). They are a meta programming feature. The code in this post occasionally uses other ES6 features. Consult “Using ECMAScript 6 toda
Espruino Pico: JavaScript on a USB Stick by Gordon Williams — Kickstarter
Control Electronics quickly and easily with a tiny USB stick that runs JavaScript Crowdfunding has now ended - you can now buy an Espruino Pico direct from our online shop.
SuperAgent — elegant API for AJAX in Node and browsers
SuperAgent SuperAgent is light-weight progressive ajax API crafted for flexibility, readability, and a low learning curve after being frustrated with many of the existing request APIs. It also works with Node.js! request .post('/api/pet') .send({ name: 'Manny', species: 'cat' }) .set('X-API-Key', 'foobar') .set('Accept', 'application/json') .then(res => { alert('yay got ' + JSON.stringify(res.body
Effectively managing memory at Gmail scale | Articles | web.dev
Introduction While JavaScript employs garbage collection for automatic memory management, it is not a substitute for effective memory management in applications. JavaScript applications suffer from the same memory related problems that native applications do, such as memory leaks and bloat, yet they must also deal with garbage collection pauses. Large-scale applications like Gmail encounter the sa
Node.js hosting, cloud products and services | Nodejitsu Inc.
Gimme your credentials Log in below to your Nodejitsu account and start rocking. Or sign up if you have no account yet. UsernamePasswordLog in Forgot password?Whoops. Apparently the cloud went to hello to the sunBut maybe you would like to do something else?See Getting Started guideGet supportGo back to the homepage
node.js の logging library の winston のソースを読む - Mitsuyuki.Shiiba
node.js を使い始めて javascript かわいいなーと思い始めたこのごろ まだ javascript の扱い方から勉強してるんだけど そんなわけなのでソースを読んで勉強しようかなと winston を選んでみた winston は nodejitsu 社が作ってる Flatiron ってオープンソースフレームワークのモジュールの一つとして開発されてるす いくつか便利機能があるんすが query とか、例外ハンドリングとか、profiler とか そのへんは今回は触らずにロギング周りを見ていくす この記事は 東京Node学園祭2012 アドベントカレンダー の 26 日目の記事です。 ファイル lib の中身はシンプル ├── winston │ ├── common.js │ ├── config │ │ ├── cli-config.js │ │ ├─
【Node.js】expressでaccess log + log rotate
expressを使ってサービスを開始する場合、 デフォルトのログではユーザの細かな情報までは得られないので、 app.jsを編集して、apacheのようなアクセスログにしてみました。 // app.js app.use(express.favicon()); // remove default logging // app.use(express.logger('dev')); app.use(express.bodyParser()); app.use(express.methodOverride()); // write access log app.use(function(req, res, next) { console.log([ req.headers['x-forwarded-for'] || req.client.remoteAddress, new Date().toL
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GitHub - cesanta/v7: Embedded JavaScript engine for C/C++
GitHub - trentm/node-bunyan: a simple and fast JSON logging module for node.js services
GitHub - salesforce/tough-cookie: RFC6265 Cookies and CookieJar for Node.js
GitHub - jakutis/httpinvoke: A no-dependencies HTTP client library for browsers and Node.js with a promise-based or Node.js-style callback-based API to progress events, text and binary file upload and download, partial response body, request and response
GitHub - ctide/fakeweb: Testing tool to create dummy responses to HTTP requests, modeled after: https://github.com/chrisk/fakeweb
