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+# es6-map
+## Map collection as specified in ECMAScript6
+
+__Warning:  
+v0.1 version does not ensure O(1) algorithm complexity (but O(n)). This shortcoming will be addressed in v1.0__
+
+
+### Usage
+
+It’s safest to use *es6-map* as a [ponyfill](https://ponyfill.com) – a polyfill which doesn’t touch global objects:
+
+```javascript
+var Map = require('es6-map');
+```
+
+If you want to make sure your environment implements `Map` globally, do:
+
+```javascript
+require('es6-map/implement');
+```
+
+If you strictly want to use the polyfill even if the native `Map` exists, do:
+
+```javascript
+var Map = require('es6-map/polyfill');
+```
+
+### Installation
+
+	$ npm install es6-map
+
+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/)
+
+#### API
+
+Best is to refer to [specification](http://people.mozilla.org/~jorendorff/es6-draft.html#sec-map-objects). Still if you want quick look, follow examples:
+
+```javascript
+var Map = require('es6-map');
+
+var x = {}, y = {}, map = new Map([['raz', 'one'], ['dwa', 'two'], [x, y]]);
+
+map.size;                 // 3
+map.get('raz');           // 'one'
+map.get(x);               // y
+map.has('raz');           // true
+map.has(x);               // true
+map.has('foo');           // false
+map.set('trzy', 'three'); // map
+map.size                  // 4
+map.get('trzy');          // 'three'
+map.has('trzy');          // true
+map.has('dwa');           // true
+map.delete('dwa');        // true
+map.size;                 // 3
+
+map.forEach(function (value, key) {
+  // { 'raz', 'one' }, { x, y }, { 'trzy', 'three' } iterated
+});
+
+// FF nightly only:
+for (value of map) {
+ // ['raz', 'one'], [x, y], ['trzy', 'three'] iterated
+}
+
+var iterator = map.values();
+
+iterator.next(); // { done: false, value: 'one' }
+iterator.next(); // { done: false, value: y }
+iterator.next(); // { done: false, value: 'three' }
+iterator.next(); // { done: true, value: undefined }
+
+map.clear(); // undefined
+map.size; // 0
+```
+
+## Tests [![Build Status](https://travis-ci.org/medikoo/es6-map.png)](https://travis-ci.org/medikoo/es6-map)
+
+	$ npm test