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const isPrimitive = obj =>
  obj === null ||
    [ 'string', 'number', 'boolean' ].includes( typeof obj )

const isArrayOfPrimitive = obj =>    
  Array.isArray( obj ) && obj.every( isPrimitive )

const format = arr => 
  `^^^[ ${
    arr.map( val => JSON.stringify( val ) ).join( ', ' )

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{
	"version": "0.2.0",
	"configurations": [
		{
			"name": "Launch",
			"type": "node",
			"request": "launch",
			"program": "${workspaceRoot}/index.js",
			"stopOnEntry": false,
			"args": [],

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interface Predicate<T> {
  ( subject:T ): boolean
}

interface DomAdapter<TNode, TElementNode> {
  // is the node a tag?
  isTag: Predicate<TNode>,

  // does at least one of passed nodes pass the test?
  existsOne: ( test:Predicate<TElementNode>, nodes:[TNode] ) => boolean,

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How to do stuff

Why would I want to do stuff?

You would probably want to do stuff because:

• Stuff is fun
• Stuff is good

How do I get into stuff?

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const flatten = array => {
  const result = []
  const nodes = array.slice()
  let node

  while( nodes.length > 0 ){
    node = nodes.pop()

    if( Array.isArray( node ) ){
      nodes.push( ...node )

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const dfsIterator = node => {
  const nodes = [ node ]

  const next = () => {
    const done = nodes.length === 0

    if( done ) return { done }

    const value = nodes.pop()
    let child = value.lastChild

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const dfsGenerator = function*( node ){
  const nodes = [ node ]

  while( nodes.length > 0 ){
    const current = nodes.pop()

    yield current

    let child = current.lastChild

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{% assign saved_amount = compare_price | minus: product_price %}

{% comment %}
  Unless this store uses multiple currencies,
  we will remove the decimals when they are equal to 00,
  or when the amount is > 10 (dollars, pounds, etc.).
{% endcomment %}

<!-- using expected price-sale template -->

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<div id="ProductSection" data-section-id="{{ section.id }}" data-section-type="product-template" data-zoom-toggle="zoom-in" data-zoom-enabled="{{ section.settings.product_image_zoom_enable }}" data-related-enabled="{{ section.settings.product_related_enable }}" data-social-sharing="{{ section.settings.social_sharing }}" data-show-compare-at-price="{{ section.settings.product_show_compare_at_price }}" data-stock="{{ section.settings.product_quantity_message }}" data-incoming-transfer="{{ section.settings.product_incoming_message }}">
{% include 'breadcrumb' %}

<div class="grid" itemscope itemtype="http://schema.org/Product">
  <meta itemprop="url" content="{{ shop.url }}{{ product.url }}">
  <meta itemprop="image" content="{{ product.featured_image.src | img_url: 'grande' }}">

  <div class="grid-item large--two-fifths">
    <div class="grid">
      <div class="grid-item large--eleven-twelfths text-center">

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$(document).ready(function () {
  var galleryCheck = $("div.gallery_sef").length;

  if( !galleryCheck ) return;

  var extensions = ["_pico.", "_icon.", "_thumb.", "_small.", "_compact.", "_medium.", "_large.", "_grande.", "_1024x1024.", "_2048x2048." ];

  $("div.gallery_sef img").each(function(){
    var $img = $(this);
    var src = $img.attr('src');