# es6-set
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## Set collection as specified in ECMAScript6
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__Warning:
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v0.1 version does not ensure O(1) algorithm complexity (but O(n)). This shortcoming will be addressed in v1.0__
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### Usage
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If you want to make sure your environment implements `Set`, do:
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```javascript
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require('es6-set/implement');
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```
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If you'd like to use native version when it exists and fallback to polyfill if it doesn't, but without implementing `Set` on global scope, do:
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```javascript
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var Set = require('es6-set');
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```
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If you strictly want to use polyfill even if native `Set` exists, do:
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```javascript
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var Set = require('es6-set/polyfill');
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```
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### Installation
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$ npm install es6-set
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To port it to Browser or any other (non CJS) environment, use your favorite CJS bundler. No favorite yet? Try: [Browserify](http://browserify.org/), [Webmake](https://github.com/medikoo/modules-webmake) or [Webpack](http://webpack.github.io/)
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#### API
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Best is to refer to [specification](http://people.mozilla.org/~jorendorff/es6-draft.html#sec-set-objects). Still if you want quick look, follow examples:
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```javascript
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var Set = require('es6-set');
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var set = new Set(['raz', 'dwa', {}]);
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set.size; // 3
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set.has('raz'); // true
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set.has('foo'); // false
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set.add('foo'); // set
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set.size // 4
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set.has('foo'); // true
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set.has('dwa'); // true
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set.delete('dwa'); // true
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set.size; // 3
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set.forEach(function (value) {
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// 'raz', {}, 'foo' iterated
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});
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// FF nightly only:
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for (value of set) {
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// 'raz', {}, 'foo' iterated
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}
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var iterator = set.values();
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iterator.next(); // { done: false, value: 'raz' }
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iterator.next(); // { done: false, value: {} }
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iterator.next(); // { done: false, value: 'foo' }
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iterator.next(); // { done: true, value: undefined }
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set.clear(); // undefined
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set.size; // 0
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```
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## Tests [](https://travis-ci.org/medikoo/es6-set)
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$ npm test
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