kevinpschaaf

An approach to binding Redux to custom elements

The code here captures some of the patterns I used in the "real estate" demo app discussed in my talk End to End Apps with Polymer from Polymer Summit 2017.

There are many ways to connect Redux to custom elements, and this demonstrates just one pattern. The most important aspects are to try and lazily-load as much of the otherwise global state management logic along with the components that need them (as shown via the lazyReducerEnhancer and addReducers calls in the connected components), and to consider the tradeoffs you make in terms of coupling components to the store.

The pattern shown here of creating a stateless component and then a subclass that connects it to the store addresses a potential desire to reuse app-level stateless components between more than one application context, so the subclass provides a degree of decoupling from the concrete store, at the expense of more boilerplate. If app com

ljharb

Array Iteration

https://gist.github.com/ljharb/58faf1cfcb4e6808f74aae4ef7944cff

While attempting to explain JavaScript's reduce method on arrays, conceptually, I came up with the following - hopefully it's helpful; happy to tweak it if anyone has suggestions.

Intro

JavaScript Arrays have lots of built in methods on their prototype. Some of them mutate - ie, they change the underlying array in-place. Luckily, most of them do not - they instead return an entirely distinct array. Since arrays are conceptually a contiguous list of items, it helps code clarity and maintainability a lot to be able to operate on them in a "functional" way. (I'll also insist on referring to an array as a "list" - although in some languages, List is a native data type, in JS and this post, I'm referring to the concept. Everywhere I use the word "list" you can assume I'm talking about a JS Array) This means, to perform a single operation on the list as a whole ("atomically"), and to return a new list - thus making it mu

moehlone

/**
 * Creates a read/writable property which returns a function set for write/set (assignment)
 * and read/get access on a variable
 *
 * @param {Any} value initial value of the property
 */
function createProperty(value) {
    var _value = value;

    /**

jdsteinbach

node_modules

ebidel

// Know how fast your HTML Imports are.
// crbug.com/505279 - doesn't show sub-import resources.
var imports = document.querySelectorAll('link[rel="import"]');
[].forEach.call(imports, function(link) {
  var entries = performance.getEntriesByName(link.href);
  console.info('=== HTML Imports perf ===');
  entries.forEach(function(e) {
    console.log(e.name, 'took', e.duration, 'ms');
  });
});

ebidel

<!-- http://jsbin.com/rageqilava/1/edit?html,output -->

<script src="http://www.polymer-project.org/webcomponents.min.js"></script>
<script src="http://www.polymer-project.org/polymer.min.js"></script>
  
<link rel="import" href="templates.html" id="templates">

<polymer-element name="foo-bar">
  <template>

rogeliog

$(function () {
  
  //Color Stat UI component
  var ColorStat = flight.component(function () {
    this.updateColorStat = function (event, data) {
      var count = parseInt(this.$node.text(), 10);

      if (this.$node.data('color') == data.color) {
        this.$node.text(count + 4);
      } else {

MattSurabian

Are your feelings hurt?

If you rushed through David Shariff's JS Quiz or are just new to JS they might be. I know mine were. After I dried my eyes, I took the quiz again, this time very slowly trying to get at the meat behind each answer. Below is my attempt to explain each question's answer and offer some interesting permutations so that others can move beyond their hurt feelings and come out the other side better JS developers.

I initially thought I'd turn this into a blog post but think it's probably better as a gist.

Question #1

Don't over think it.

var foo = function foo() {

ragingwind

Backend Architectures

Twitter

ror, scala, jetty, erlang, thrift, mongrel, comet server, my-sql, memchached, varnish, kestrel(mq), starling, gizzard, cassandra, hadoop, vertica, munin, nagios, awstats

• Introduce Gizzard of Twitter - 트위터의 새로운 분산 관리 라이브러리 Gizzard를 소개합니다.
• The Architecture Twitter Uses to Deal with 150M Active Users, 300K QPS, a 22 MB/S Firehose, and Send Tweets in Under 5 Seconds
• Scaling Twitter: Making Twitter 10000 Percent Faster

max-mapper

Note: this rough draft has turned into https://github.com/maxogden/art-of-node#art-of-node

go to https://github.com/maxogden/art-of-node#art-of-node to view the newer versions of this document

Introduction to Node.js

Table of contents

• Understanding node
• Core modules