jareware

Important: At the time of writing (2019-11-11) Immutable.js is effectively abandonware, so I can no longer recommend anyone to follow the advice given here. I'll leave the article here for posterity, since it's still getting some traffic.

Understanding Immutable.Record

Functional programming principles and with it immutable data are changing the way we write frontend applications. If the recent de-facto frontend stack of React and Redux feels like it goes perfectly together with immutable data, that's because it's specifically designed for that.

There's several interesting implementations of immutable data for JavaScript, but here I'll be focusing on Facebook's own Immutable.js, and specifically on one of i

istarkov

// no string get
const get = (fn, def) => {
  try {
    return fn();
  } catch (e) {
    return def;
  }
};

// usage example

brentvatne

NavigationExperimental notes

Containers

RootNavigationContainer

• You pass the reducer to this, it actually ultimately receives all navigation calls via onNavigate, which is mostly equivalent to Redux dispatch. It setState and persisting state. it is like the redux "store"

brentvatne

var React = require('react-native');

var {
  ListView,
  LayoutAnimation,
  View,
  Animated,
  PanResponder,
  TouchableWithoutFeedback
} = React;

davestevens

Let's Encrypt

Examples of getting certificates from Let's Encrypt working on Apache, NGINX and Node.js servers.

Obtain certificates

I chose to use the manual method, you have to make a file available to verify you own the domain. Follow the commands from running

git clone https://github.com/letsencrypt/letsencrypt
cd letsencrypt

leipert

// These window.navigator contain language information
// 1. languages -> Array of preferred languages (eg ["en-US", "zh-CN", "ja-JP"]) Firefox^32, Chrome^32
// 2. language  -> Preferred language as String (eg "en-US") Firefox^5, IE^11, Safari, 
//                 Chrome sends Browser UI language
// 3. browserLanguage -> UI Language of IE
// 4. userLanguage    -> Language of Windows Regional Options
// 5. systemLanguage  -> UI Language of Windows
var browserLanguagePropertyKeys = ['languages', 'language', 'browserLanguage', 'userLanguage', 'systemLanguage'];

learncodeacademy

//events - a super-basic Javascript (publish subscribe) pattern

var events = {
  events: {},
  on: function (eventName, fn) {
    this.events[eventName] = this.events[eventName] || [];
    this.events[eventName].push(fn);
  },
  off: function(eventName, fn) {
    if (this.events[eventName]) {

ourmaninamsterdam

The MIT License (MIT)

Copyright (c) 2015 Justin Perry

Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:

brentvatne

var d3 = require('d3');
var jsdom = require("jsdom-little");
var React = require('react-native');
var { View, Text } = React;
var Svg = require('./Svg');

var parseDate = d3.time.format("%d-%b-%y").parse;

var D3Chart = React.createClass({
  componentDidMount() {

sebmarkbage

import { Component } from "React";

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