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node_modules/es6-weak-map/README.md

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+[![Build status][nix-build-image]][nix-build-url]
+[![Windows status][win-build-image]][win-build-url]
+![Transpilation status][transpilation-image]
+[![npm version][npm-image]][npm-url]
+
+# es6-weak-map
+
+## WeakMap collection as specified in ECMAScript6
+
+_Roughly inspired by Mark Miller's and Kris Kowal's [WeakMap implementation](https://github.com/drses/weak-map)_.
+
+Differences are:
+
+-   Assumes compliant ES5 environment (no weird ES3 workarounds or hacks)
+-   Well modularized CJS style
+-   Based on one solution.
+
+### Limitations
+
+-   Will fail on non extensible objects provided as keys
+
+### Installation
+
+    $ npm install es6-weak-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/)
+
+### Usage
+
+If you want to make sure your environment implements `WeakMap`, do:
+
+```javascript
+require("es6-weak-map/implement");
+```
+
+If you'd like to use native version when it exists and fallback to polyfill if it doesn't, but without implementing `WeakMap` on global scope, do:
+
+```javascript
+var WeakMap = require("es6-weak-map");
+```
+
+If you strictly want to use polyfill even if native `WeakMap` exists, do:
+
+```javascript
+var WeakMap = require("es6-weak-map/polyfill");
+```
+
+#### API
+
+Best is to refer to [specification](http://people.mozilla.org/~jorendorff/es6-draft.html#sec-weakmap-objects). Still if you want quick look, follow example:
+
+```javascript
+var WeakMap = require("es6-weak-map");
+
+var map = new WeakMap();
+var obj = {};
+
+map.set(obj, "foo"); // map
+map.get(obj); // 'foo'
+map.has(obj); // true
+map.delete(obj); // true
+map.get(obj); // undefined
+map.has(obj); // false
+map.set(obj, "bar"); // map
+map.has(obj); // false
+```
+
+## Tests
+
+    $ npm test
+
+[nix-build-image]: https://semaphoreci.com/api/v1/medikoo-org/es6-weak-map/branches/master/shields_badge.svg
+[nix-build-url]: https://semaphoreci.com/medikoo-org/es6-weak-map
+[win-build-image]: https://ci.appveyor.com/api/projects/status/1c73c57pg4s6lwmu?svg=true
+[win-build-url]: https://ci.appveyor.com/project/medikoo/es6-weak-map
+[transpilation-image]: https://img.shields.io/badge/transpilation-free-brightgreen.svg
+[npm-image]: https://img.shields.io/npm/v/es6-weak-map.svg
+[npm-url]: https://www.npmjs.com/package/es6-weak-map