Yulong Ruan ruanyl

Updated on medium

find out the differences

use git diff to generate file list

git diff --name-only master

limited to certain file types

add ext filter

Ikea Bekant standing desk with Gerton table top

Common Options

-#, --progress-bar Make curl display a simple progress bar instead of the more informational standard meter.

-b, --cookie <name=data> Supply cookie with request. If no =, then specifies the cookie file to use (see -c).

-c, --cookie-jar <file name> File to save response cookies to.

System Design Cheatsheet

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

Basic Steps

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?

@kangax's ES6 quiz, explained

@kangax created a new interesting quiz, this time devoted to ES6 (aka ES2015). I found this quiz very interesting and quite hard (made myself 3 mistakes on first pass).

Here we go with the explanations:

Question 1:

(function(x, f = () =&gt; x) {

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

Jenkins, Protractor and Headless Chrome Browser Setup on Ubuntu 14.04

Update Ubuntu

sudo apt-get update
sudo apt-get upgrade

	{
	"scripts": {
	"build": "npm run build:es2015 && npm run build:esm && npm run build:cjs && npm run build:umd && npm run build:umd:min",
	"build:es2015": "tsc --module es2015 --target es2015 --outDir dist/es2015",
	"build:esm": "tsc --module es2015 --target es5 --outDir dist/esm",
	"build:cjs": "tsc --module commonjs --target es5 --outDir dist/cjs",
	"build:umd": "rollup dist/esm/index.js --format umd --name YourLibrary --sourceMap --output dist/umd/yourlibrary.js",
	"build:umd:min": "cd dist/umd && uglifyjs --compress --mangle --source-map --screw-ie8 --comments --o yourlibrary.min.js -- yourlibrary.js && gzip yourlibrary.min.js -c > yourlibrary.min.js.gz",
	}
	}

	import React, { Component } from 'react'
	import Subapp from './subapp/Root'

	class BigApp extends Component {
	render() {
	return (
	<div>
	<Subapp />
	<Subapp />
	<Subapp />

	import { Component } from "React";

	export var Enhance = ComposedComponent => class extends Component {
	constructor() {
	this.state = { data: null };
	}
	componentDidMount() {
	this.setState({ data: 'Hello' });
	}
	render() {