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@btroncone
btroncone / rxjs_operators_by_example.md
Last active March 30, 2025 21:26
RxJS 5 Operators By Example
@btroncone
btroncone / ngrxintro.md
Last active September 5, 2025 05:30
A Comprehensive Introduction to @ngrx/store - Companion to Egghead.io Series

Comprehensive Introduction to @ngrx/store

By: @BTroncone

Also check out my lesson @ngrx/store in 10 minutes on egghead.io!

Update: Non-middleware examples have been updated to ngrx/store v2. More coming soon!

Table of Contents

@vasanthk
vasanthk / System Design.md
Last active September 6, 2025 21:59
System Design Cheatsheet

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

  1. Clarify and agree on the scope of the system
  • User cases (description of sequences of events that, taken together, lead to a system doing something useful)
    • Who is going to use it?
    • How are they going to use it?
@mrzmyr
mrzmyr / index.js
Created November 22, 2015 16:56
React Native - Detect Double Tap
var Index = React.createClass({
getInitialState: function () {
return {
lastPress: 0
}
},
onPress: function () {
var delta = new Date().getTime() - this.state.lastPress;
@datchley
datchley / es6-eventemitter.js
Last active June 7, 2021 03:40
A straight forward EventEmitter implemented in Javascript using ES6
let isFunction = function(obj) {
return typeof obj == 'function' || false;
};
class EventEmitter {
constructor() {
this.listeners = new Map();
}
addListener(label, callback) {
this.listeners.has(label) || this.listeners.set(label, []);
@paulirish
paulirish / what-forces-layout.md
Last active August 28, 2025 15:03
What forces layout/reflow. The comprehensive list.

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics
  • elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent
/**
* ================== angular-ios9-uiwebview.patch.js v1.1.1 ==================
*
* This patch works around iOS9 UIWebView regression that causes infinite digest
* errors in Angular.
*
* The patch can be applied to Angular 1.2.0 – 1.4.5. Newer versions of Angular
* have the workaround baked in.
*
* To apply this patch load/bundle this file with your application and add a
@BinaryMuse
BinaryMuse / restful.js
Last active March 17, 2019 08:22
Express API with Async/Await
import express from "express";
/**
* Takes a route handling function and returns a function
* that wraps it after first checking that the strings in
* `reserved` are not part of `req.body`. Used for ensuring
* create and update requests do not overwrite server-generated
* values.
*/
function checkReservedParams(routeHandler, ...reserved) {
@danielgtaylor
danielgtaylor / gist:0b60c2ed1f069f118562
Last active May 2, 2025 15:13
Moving to ES6 from CoffeeScript

Moving to ES6 from CoffeeScript

I fell in love with CoffeeScript a couple of years ago. Javascript has always seemed something of an interesting curiosity to me and I was happy to see the meteoric rise of Node.js, but coming from a background of Python I really preferred a cleaner syntax.

In any fast moving community it is inevitable that things will change, and so today we see a big shift toward ES6, the new version of Javascript. It incorporates a handful of the nicer features from CoffeeScript and is usable today through tools like Babel. Here are some of my thoughts and issues on moving away from CoffeeScript in favor of ES6.

While reading I suggest keeping open a tab to Babel's learning ES6 page. The examples there are great.

Punctuation

Holy punctuation, Batman! Say goodbye to your whitespace and hello to parenthesis, curly braces, and semicolons again. Even with the advanced ES6 syntax you'll find yourself writing a lot more punctuatio