Socket
Socket
Sign inDemoInstall

es6-map

Package Overview
Dependencies
10
Maintainers
1
Versions
8
Alerts
File Explorer

Advanced tools

Install Socket

Detect and block malicious and high-risk dependencies

Install

es6-map

ECMAScript6 Map polyfill


Version published
Maintainers
1
Weekly downloads
1,340,161
decreased by-12.45%

Weekly downloads

Readme

Source

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 – a polyfill which doesn’t touch global objects:

var Map = require('es6-map');

If you want to make sure your environment implements Map globally, do:

require('es6-map/implement');

If you strictly want to use the polyfill even if the native Map exists, do:

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, Webmake or Webpack

API

Best is to refer to specification. Still if you want quick look, follow examples:

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

$ npm test

Keywords

FAQs

Last updated on 17 Mar 2017

Did you know?

Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.

Install

Related posts

SocketSocket SOC 2 Logo

Product

  • Package Alerts
  • Integrations
  • Docs
  • Pricing
  • FAQ
  • Roadmap

Stay in touch

Get open source security insights delivered straight into your inbox.


  • Terms
  • Privacy
  • Security

Made with ⚡️ by Socket Inc