MelissaKaulfuss

Managing Ruby Versions with chruby

So I'm always forgetting how to do this! I guess I'm only ever updating Ruby versions every now and then.

Checking out which Ruby versions chruby has access to

$ chruby will display your installed rubies and show you the version you're currently using in your shell.

   ruby-2.1.2
   ruby-2.2.1
 ruby-2.3.1

DavidKuennen

(function (context, trackingId, options) {
    const history = context.history;
    const doc = document;
    const nav = navigator || {};
    const storage = localStorage;
    const encode = encodeURIComponent;
    const pushState = history.pushState;
    const typeException = 'exception';
    const generateId = () => Math.random().toString(36);
    const getId = () => {

jakub-g

<script> async, defer, async defer, module, nomodule, src, inline - the cheat sheet

With the addition of ES modules, there's now no fewer than 24 ways to load your JS code: (inline|not inline) x (defer|no defer) x (async|no async) x (type=text/javascript | type=module | nomodule) -- and each of them is subtly different.

This document is a comparison of various ways the <script> tags in HTML are processed depending on the attributes set.

If you ever wondered when to use inline <script async type="module"> and when <script nomodule defer src="...">, you're in the good place!

Note that this article is about <script>s inserted in the HTML; the behavior of <script>s inserted at runtime is slightly different - see Deep dive into the murky waters of script loading by Jake Archibald (2013)

samarpanda

Increase the speed of HTML5 videos

document.getElementsByTagName('video')[0].playbackRate = 2

Works in frontendmasters

1Marc

## Day 1

9:30AM - Introduction
10:00AM - Pure React
11:00AM - npm, Prettier, ESLint
11:30AM - Parcel
12:00PM - Lunch
1:00PM - JSX
2:00PM - State and Lifecycle Methods with React
3:00PM - Reach Reactor

bluesmoon

Moved to https://developer.akamai.com/tools/boomerang#mPulseNon-BlockingLoaderSnippet

This is a loader snippet for boomerang (https://github.com/soasta/boomerang) that doesn't use the iframe except for legacy browsers, and does not use document.write

If an iframe is required, it is injected into the page immediately or soon after the script, so you may place the script wherever in the HTML you would like the iframe to show up.

For IE6 & 7, we will fallback to a same-window iframeless dynamic script node. This does mean that the script will be a Single Point of Failure for these two browsers, but given the low combined market share of these two browsers, the choice is between not getting any beacons for these browsers or potentially being a SPoF for users of these browsers.

You MUST include everything, including the `

gaearon

Note:

When this guide is more complete, the plan is to move it into Prepack documentation.
For now I put it out as a gist to gather initial feedback.

A Gentle Introduction to Prepack (Part 1)

If you're building JavaScript apps, you might already be familiar with some tools that compile JavaScript code to equivalent JavaScript code:

• Babel lets you use newer JavaScript language features, and outputs equivalent code that targets older JavaScript engines.

stevekinney

Web Performance

Requirements

• You need to have the latest version of Node. Preferably, you're using 9.8.0, but the latest LTS should work as well.
• You should have npx installed using npm install -g npx.
• Install the React Developer Tools.

Repositories

ebidel

Moved to https://github.com/ebidel/puppeteer-examples/blob/master/monitor_internet_connection.js

samarpanda

State Management Patterns

Repositories

Download the following repositories and run yarn install in each:

• Basic Counter
• Pizza Calculator
• Jetsetter
• Offices and Dragons