Jane Molodetskaya march213

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 much simpler to think about both the old list and the new one, what they contain, and

	@charset "UTF-8";
	html{
	font-family:"PT Serif", Georgia, serif;
	font-size:100%;
	line-height:1.6;
	background:#fff;
	color:#000;
	-webkit-overflow-scrolling:touch; }

	body{

	{
	// http://eslint.org/docs/rules/

	"ecmaFeatures": {
	"binaryLiterals": false, // enable binary literals
	"blockBindings": false, // enable let and const (aka block bindings)
	"defaultParams": false, // enable default function parameters
	"forOf": false, // enable for-of loops
	"generators": false, // enable generators
	"objectLiteralComputedProperties": false, // enable computed object literal property names

	html {
	font-family: sans-serif;
	-ms-text-size-adjust: 100%;
	-webkit-text-size-adjust: 100%
	}

	body {
	margin: 0
	}

	var T2 = (()=>{
	// todo: mixins collection
	class Foo {
	foo () {
	this.__super();
	console.log(this.bar());
	}
	bar() {console.log('bar')}
	}

	const isObject = value => value === Object(value)
	const isArray = value => Array.isArray(value)
	const isFile = value => value instanceof File
	const makeArrayKey = (key) => {
	if (key.length > 2 && key.lastIndexOf('[]') === key.length - 2) {
	return key
	} else {
	return key + '[]'
	}
	}

	# Windows image file caches
	Thumbs.db
	ehthumbs.db

	# Folder config file
	Desktop.ini

	# Recycle Bin used on file shares
	$RECYCLE.BIN/

	#!/usr/bin/env ruby

	require 'open-uri'
	require 'pathname'
	require 'json'

	def strip_hash(f)
	ext = f.extname

	if ext.include?("?")

	@import '../mixins/responsive';

	.carousel {
	&.is-fullscreen {
	position: fixed;
	z-index: 100;
	top: 0;
	left: 0;
	bottom: 0;
	right: 0;

Jane Molodetskaya march213

Intro

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