DmitrySoshnikov

@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 = () => x) {

sebmarkbage

import { Component } from "React";

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

dpup

FastMutex.prototype.runInLock = function (callback, opt_context) {
  this._setX()

  if (!this._isLockAvailable()) {
    this._retry(callback, opt_context)
    return
  }

  this._setY()

xmlking

export class EnumSymbol {
    sym = Symbol.for(name);
    value: number;
    description: string;

    constructor(name: string, {value, description}) {

        if(!Object.is(value, undefined)) this.value  = value;
        if(description) this.description  = description;

staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

---

listochkin

  --log_gc (Log heap samples on garbage collection for the hp2ps tool.)
        type: bool  default: false
  --expose_gc (expose gc extension)
        type: bool  default: false
  --max_new_space_size (max size of the new generation (in kBytes))
        type: int  default: 0
  --max_old_space_size (max size of the old generation (in Mbytes))
        type: int  default: 0
  --max_executable_size (max size of executable memory (in Mbytes))
        type: int  default: 0

peterc

# Monitor HTTP requests being made from your machine with a one-liner..
# Replace "en1" below with your network interface's name (usually en0 or en1)
sudo tcpdump -i en1 -n -s 0 -w - | grep -a -o -E "Host\: .*|GET \/.*"

# OR.. to be able to use as "httpdump" from anywhere, drop this into ~/.bash_profile:
# (again replace "en1" with correct network interface name)
alias httpdump="sudo tcpdump -i en1 -n -s 0 -w - | grep -a -o -E "Host\: .*|GET \/.*""

# All the above tested only on OS X.