Partial Application Get/Set

controllers.application.js

import Ember from 'ember';
import '../prism';
import getSetDecorator from '../ember-getsetter';
import exampleSlides from '../example-slides';

let {get, set} = getSetDecorator();
let examples = [];
exampleSlides.forEach(function(item) {
  examples.push(item);
});

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',

  testValue: examples[0],


  actions: {

    testSetFunctions() {
      switch (get(this, 'testValue')[0]) {
        case 0:
          return set(this, 'testValue',  examples[1]);
        case 1:
          return set(this)('testValue', examples[2]);
        case 2:
          return set(this, 'testValue')(examples[3]);
        case 3:
          return set(this)('testValue')(examples[4]);
        case 4:
          return this.set('testValue', examples[0]);

        default:
          this.set('testValue', 'click me!');
          alert('If you see this alert, then we have failed ...');
      }
    }

  }
});

ember-getsetter.js

/**
 * Decorate an object/namespace with a more functional
 * styles of Ember.{set,get} that allow partial execution.
 *
 * @param namespace
 * @returns {{}}
 */
export default function emberGetsetterDecorator(namespace = {}) {
  namespace.get = partialEmberGetter;
  namespace.set = partialEmberSetter;
  return namespace;
}

function partialEmberGetter (context, property) {
  return (arguments.length !== 1) ?
    Ember.get.call(context, context, property) : (prop) => Ember.get.call(context, context, prop);
}

function partialEmberSetter (context, property, value) {
  switch (arguments.length) {
    case 1:
      return partialEmberSetter.bind(null, context);
    case 2:
      return partialEmberSetter.bind(null, context, property);
    default:
      return Ember.set.call(null, context, property, value);
  }
}

example-slides.js

export default [
  [0, 'click me!', `
function explaination () {
  return \`All of these examples are
      set using the same style set as 
      displayed below in the code preview..`],
  [1, 'All at once!', `
export default Ember.Component({
  weCanDo() {
    let item = get(this, 'item');
    set( this, 'parsedItem', parse( item ) );
  }
});`],
  [2, 'Prepare the context!', `
export default Ember.Component({

  settingToThis() {
    let setThis = set( this );

    setThis('item1', item1);
    setThis('item2', item2);
  }

});`],
  [3, 'Specific property setter!', `
export default Ember.Component({

  settingSpecific() {
    let setThing = set( this, 'thing' );

    if (get(this, 'sale') {
    	setThing( 200.00 );  
    }
    else {
      setThing( 300.00 );
    }
  }

});`],
  [4, 'Unary Unary Unary!', `
export default Ember.Component({

  settingLikeLoco() {
    let setThis = set( this ),
        setThing1 = setThis( 'thing1' );

    set( this )( 'thing2' )( 199 );
  }

});`]
];

prism.js

/* http://prismjs.com/download.html?themes=prism-twilight */
var _self="undefined"!=typeof window?window:"undefined"!=typeof WorkerGlobalScope&&self instanceof WorkerGlobalScope?self:{},Prism=function(){var e=/\blang(?:uage)?-(\w+)\b/i,t=0,n=_self.Prism={util:{encode:function(e){return e instanceof a?new a(e.type,n.util.encode(e.content),e.alias):"Array"===n.util.type(e)?e.map(n.util.encode):e.replace(/&/g,"&amp;").replace(/</g,"&lt;").replace(/\u00a0/g," ")},type:function(e){return Object.prototype.toString.call(e).match(/\[object (\w+)\]/)[1]},objId:function(e){return e.__id||Object.defineProperty(e,"__id",{value:++t}),e.__id},clone:function(e){var t=n.util.type(e);switch(t){case"Object":var a={};for(var r in e)e.hasOwnProperty(r)&&(a[r]=n.util.clone(e[r]));return a;case"Array":return e.map&&e.map(function(e){return n.util.clone(e)})}return e}},languages:{extend:function(e,t){var a=n.util.clone(n.languages[e]);for(var r in t)a[r]=t[r];return a},insertBefore:function(e,t,a,r){r=r||n.languages;var i=r[e];if(2==arguments.length){a=arguments[1];for(var l in a)a.hasOwnProperty(l)&&(i[l]=a[l]);return i}var o={};for(var s in i)if(i.hasOwnProperty(s)){if(s==t)for(var l in a)a.hasOwnProperty(l)&&(o[l]=a[l]);o[s]=i[s]}return n.languages.DFS(n.languages,function(t,n){n===r[e]&&t!=e&&(this[t]=o)}),r[e]=o},DFS:function(e,t,a,r){r=r||{};for(var i in e)e.hasOwnProperty(i)&&(t.call(e,i,e[i],a||i),"Object"!==n.util.type(e[i])||r[n.util.objId(e[i])]?"Array"!==n.util.type(e[i])||r[n.util.objId(e[i])]||(r[n.util.objId(e[i])]=!0,n.languages.DFS(e[i],t,i,r)):(r[n.util.objId(e[i])]=!0,n.languages.DFS(e[i],t,null,r)))}},plugins:{},highlightAll:function(e,t){var a={callback:t,selector:'code[class*="language-"], [class*="language-"] code, code[class*="lang-"], [class*="lang-"] code'};n.hooks.run("before-highlightall",a);for(var r,i=a.elements||document.querySelectorAll(a.selector),l=0;r=i[l++];)n.highlightElement(r,e===!0,a.callback)},highlightElement:function(t,a,r){for(var i,l,o=t;o&&!e.test(o.className);)o=o.parentNode;o&&(i=(o.className.match(e)||[,""])[1].toLowerCase(),l=n.languages[i]),t.className=t.className.replace(e,"").replace(/\s+/g," ")+" language-"+i,o=t.parentNode,/pre/i.test(o.nodeName)&&(o.className=o.className.replace(e,"").replace(/\s+/g," ")+" language-"+i);var s=t.textContent,u={element:t,language:i,grammar:l,code:s};if(n.hooks.run("before-sanity-check",u),!u.code||!u.grammar)return n.hooks.run("complete",u),void 0;if(n.hooks.run("before-highlight",u),a&&_self.Worker){var c=new Worker(n.filename);c.onmessage=function(e){u.highlightedCode=e.data,n.hooks.run("before-insert",u),u.element.innerHTML=u.highlightedCode,r&&r.call(u.element),n.hooks.run("after-highlight",u),n.hooks.run("complete",u)},c.postMessage(JSON.stringify({language:u.language,code:u.code,immediateClose:!0}))}else u.highlightedCode=n.highlight(u.code,u.grammar,u.language),n.hooks.run("before-insert",u),u.element.innerHTML=u.highlightedCode,r&&r.call(t),n.hooks.run("after-highlight",u),n.hooks.run("complete",u)},highlight:function(e,t,r){var i=n.tokenize(e,t);return a.stringify(n.util.encode(i),r)},tokenize:function(e,t){var a=n.Token,r=[e],i=t.rest;if(i){for(var l in i)t[l]=i[l];delete t.rest}e:for(var l in t)if(t.hasOwnProperty(l)&&t[l]){var o=t[l];o="Array"===n.util.type(o)?o:[o];for(var s=0;s<o.length;++s){var u=o[s],c=u.inside,g=!!u.lookbehind,h=!!u.greedy,f=0,d=u.alias;if(h&&!u.pattern.global){var p=u.pattern.toString().match(/[imuy]*$/)[0];u.pattern=RegExp(u.pattern.source,p+"g")}u=u.pattern||u;for(var m=0,y=0;m<r.length;y+=(r[m].matchedStr||r[m]).length,++m){var v=r[m];if(r.length>e.length)break e;if(!(v instanceof a)){u.lastIndex=0;var b=u.exec(v),k=1;if(!b&&h&&m!=r.length-1){if(u.lastIndex=y,b=u.exec(e),!b)break;for(var w=b.index+(g?b[1].length:0),_=b.index+b[0].length,A=m,S=y,P=r.length;P>A&&_>S;++A)S+=(r[A].matchedStr||r[A]).length,w>=S&&(++m,y=S);if(r[m]instanceof a||r[A-1].greedy)continue;k=A-m,v=e.slice(y,S),b.index-=y}if(b){g&&(f=b[1].length);var w=b.index+f,b=b[0].slice(f),_=w+b.length,x=v.slice(0,w),O=v.slice(_),j=[m,k];x&&j.push(x);var N=new a(l,c?n.tokenize(b,c):b,d,b,h);j.push(N),O&&j.push(O),Array.prototype.splice.apply(r,j)}}}}}return r},hooks:{all:{},add:function(e,t){var a=n.hooks.all;a[e]=a[e]||[],a[e].push(t)},run:function(e,t){var a=n.hooks.all[e];if(a&&a.length)for(var r,i=0;r=a[i++];)r(t)}}},a=n.Token=function(e,t,n,a,r){this.type=e,this.content=t,this.alias=n,this.matchedStr=a||null,this.greedy=!!r};if(a.stringify=function(e,t,r){if("string"==typeof e)return e;if("Array"===n.util.type(e))return e.map(function(n){return a.stringify(n,t,e)}).join("");var i={type:e.type,content:a.stringify(e.content,t,r),tag:"span",classes:["token",e.type],attributes:{},language:t,parent:r};if("comment"==i.type&&(i.attributes.spellcheck="true"),e.alias){var l="Array"===n.util.type(e.alias)?e.alias:[e.alias];Array.prototype.push.apply(i.classes,l)}n.hooks.run("wrap",i);var o="";for(var s in i.attributes)o+=(o?" ":"")+s+'="'+(i.attributes[s]||"")+'"';return"<"+i.tag+' class="'+i.classes.join(" ")+'"'+(o?" "+o:"")+">"+i.content+"</"+i.tag+">"},!_self.document)return _self.addEventListener?(_self.addEventListener("message",function(e){var t=JSON.parse(e.data),a=t.language,r=t.code,i=t.immediateClose;_self.postMessage(n.highlight(r,n.languages[a],a)),i&&_self.close()},!1),_self.Prism):_self.Prism;var r=document.currentScript||[].slice.call(document.getElementsByTagName("script")).pop();return r&&(n.filename=r.src,document.addEventListener&&!r.hasAttribute("data-manual")&&("loading"!==document.readyState?window.requestAnimationFrame?window.requestAnimationFrame(n.highlightAll):window.setTimeout(n.highlightAll,16):document.addEventListener("DOMContentLoaded",n.highlightAll))),_self.Prism}();"undefined"!=typeof module&&module.exports&&(module.exports=Prism),"undefined"!=typeof global&&(global.Prism=Prism);

styles.app.css

body {
  margin: 12px 16px;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 12pt;
}

h2.btn {
  background: #AEFCDE;
  color: #464D4A;
  padding: .5rem .25rem .33rem;
  text-align: center;
  border: .1175rem solid #3A3E3C;
  border-radius: .15rem;
  cursor: pointer;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}


/** PRISM CSS */
/* http://prismjs.com/download.html?themes=prism-twilight */
/**
 * prism.js Twilight theme
 * Based (more or less) on the Twilight theme originally of Textmate fame.
 * @author Remy Bach
 */
code[class*="language-"],
pre[class*="language-"] {
	color: white;
	background: none;
	font-family: Consolas, Monaco, 'Andale Mono', 'Ubuntu Mono', monospace;
	text-align: left;
	text-shadow: 0 -.1em .2em black;
	white-space: pre;
	word-spacing: normal;
	word-break: normal;
	word-wrap: normal;
	line-height: 1.5;

	-moz-tab-size: 4;
	-o-tab-size: 4;
	tab-size: 4;

	-webkit-hyphens: none;
	-moz-hyphens: none;
	-ms-hyphens: none;
	hyphens: none;
}

pre[class*="language-"],
:not(pre) > code[class*="language-"] {
	background: hsl(0, 0%, 8%); /* #141414 */
}

/* Code blocks */
pre[class*="language-"] {
	border-radius: .5em;
	border: .3em solid hsl(0, 0%, 33%); /* #282A2B */
	box-shadow: 1px 1px .5em black inset;
	margin: .5em 0;
	overflow: auto;
	padding: 1em;
}

pre[class*="language-"]::-moz-selection {
	/* Firefox */
	background: hsl(200, 4%, 16%); /* #282A2B */
}

pre[class*="language-"]::selection {
	/* Safari */
	background: hsl(200, 4%, 16%); /* #282A2B */
}

/* Text Selection colour */
pre[class*="language-"]::-moz-selection, pre[class*="language-"] ::-moz-selection,
code[class*="language-"]::-moz-selection, code[class*="language-"] ::-moz-selection {
	text-shadow: none;
	background: hsla(0, 0%, 93%, 0.15); /* #EDEDED */
}

pre[class*="language-"]::selection, pre[class*="language-"] ::selection,
code[class*="language-"]::selection, code[class*="language-"] ::selection {
	text-shadow: none;
	background: hsla(0, 0%, 93%, 0.15); /* #EDEDED */
}

/* Inline code */
:not(pre) > code[class*="language-"] {
	border-radius: .3em;
	border: .13em solid hsl(0, 0%, 33%); /* #545454 */
	box-shadow: 1px 1px .3em -.1em black inset;
	padding: .15em .2em .05em;
	white-space: normal;
}

.token.comment,
.token.prolog,
.token.doctype,
.token.cdata {
	color: hsl(0, 0%, 47%); /* #777777 */
}

.token.punctuation {
	opacity: .7;
}

.namespace {
	opacity: .7;
}

.token.tag,
.token.boolean,
.token.number,
.token.deleted {
	color: hsl(14, 58%, 55%); /* #CF6A4C */
}

.token.keyword,
.token.property,
.token.selector,
.token.constant,
.token.symbol,
.token.builtin {
	color: hsl(53, 89%, 79%); /* #F9EE98 */
}

.token.attr-name,
.token.attr-value,
.token.string,
.token.char,
.token.operator,
.token.entity,
.token.url,
.language-css .token.string,
.style .token.string,
.token.variable,
.token.inserted {
	color: hsl(76, 21%, 52%); /* #8F9D6A */
}

.token.atrule {
	color: hsl(218, 22%, 55%); /* #7587A6 */
}

.token.regex,
.token.important {
	color: hsl(42, 75%, 65%); /* #E9C062 */
}

.token.important,
.token.bold {
	font-weight: bold;
}
.token.italic {
	font-style: italic;
}

.token.entity {
	cursor: help;
}

pre[data-line] {
	padding: 1em 0 1em 3em;
	position: relative;
}

/* Markup */
.language-markup .token.tag,
.language-markup .token.attr-name,
.language-markup .token.punctuation {
	color: hsl(33, 33%, 52%); /* #AC885B */
}

/* Make the tokens sit above the line highlight so the colours don't look faded. */
.token {
	position: relative;
	z-index: 1;
}

.line-highlight {
	background: hsla(0, 0%, 33%, 0.25); /* #545454 */
	background: linear-gradient(to right, hsla(0, 0%, 33%, .1) 70%, hsla(0, 0%, 33%, 0)); /* #545454 */
	border-bottom: 1px dashed hsl(0, 0%, 33%); /* #545454 */
	border-top: 1px dashed hsl(0, 0%, 33%); /* #545454 */
	left: 0;
	line-height: inherit;
	margin-top: 0.75em; /* Same as .prism’s padding-top */
	padding: inherit 0;
	pointer-events: none;
	position: absolute;
	right: 0;
	white-space: pre;
	z-index: 0;
}

.line-highlight:before,
.line-highlight[data-end]:after {
	background-color: hsl(215, 15%, 59%); /* #8794A6 */
	border-radius: 999px;
	box-shadow: 0 1px white;
	color: hsl(24, 20%, 95%); /* #F5F2F0 */
	content: attr(data-start);
	font: bold 65%/1.5 sans-serif;
	left: .6em;
	min-width: 1em;
	padding: 0 .5em;
	position: absolute;
	text-align: center;
	text-shadow: none;
	top: .4em;
	vertical-align: .3em;
}

.line-highlight[data-end]:after {
	bottom: .4em;
	content: attr(data-end);
	top: auto;
}

templates.application.hbs

<h1>Partial Ember <small>Getter/Setter</small></h1>
<br>
<p>
  click the box below and it will cycle through setting 
  the value of <code>testValue</code> using different 
  partial applications of the <code>set</code> functions
  created in <code>ember-getsetter.js</code>
</p>

<h2 class="btn" {{action 'testSetFunctions'}}>
    {{ testValue.[1] }}
</h2>
<pre>
  <code class="language-javascript">
	  {{ testValue.[2] }}
  </code>
</pre>
{{outlet}}

twiddle.json

{
  "version": "0.10.4",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.7.0",
    "ember-data": "2.7.0",
    "ember-template-compiler": "2.7.0"
  },
  "addons": {}
}