promise-arrays
v0.1.0
Published
Promise Arrays [![NPM version][npm-version-image]][npm-url] [![Travis Build][travis-build-image]][travis-url] [![MIT License][license-image]][license-url] === A super small library to help you map and filter arrays with async operations. The only hard dep
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Promise Arrays
A super small library to help you map and filter arrays with async operations. The only hard dependency is
Promise
so it needs to be present some how in your project (polyfill or native).
Compatible with NodeJS, CommonJS, AMD and Browser Globals.
Install
Available on npm
:
$ npm install promise-arrays --save
NodeJS
Install using npm
Then:
// ES5:
var PromiseArrays = require('promise-arrays');
// ES6:
import PromiseArrays from 'promise-arrays';
AMD
Install npm
and include in your AMD project, then:
// Include as dependency:
define(['promise-arrays'], function (PromiseArrays) {
// Use Here...
});
Browser Globals
<script src="/path/to/promise-arrays.js"></script>
Usage
All methods in this library return a Promise
object. The API is similar to JS native filter
and map
, although
you can return a Promise
instead of just returning the result.
PromiseArrays.map(array, callback) → Promise
Mutate elements of an array using a given callback. Return a value to replace the original item or a Promise
object.
var array = [1, 2, 3, 4, 5];
// Sync
var promise = PromiseArrays.map(array, function (item, index) {
return item * 10;
}).then(function (result) {
console.log(result); // [10, 20, 30, 40, 50]
});
// Async
var promise = PromiseArrays.map(array, function (item, index) {
return new Promise(function (resolve, reject) {
setTimeout(function () {
resolve(item * 10);
}, 100);
});
}).then(function (result) {
console.log(result); // [10, 20, 30, 40, 50] After ~ 100ms
});
You can also use each
instead of map
, which is basically an alias to map
.
PromiseArrays.filter(array, callback) → Promise
Filter an array based on given criteria. API usage is similar to .map
var array = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
var promise = PromiseArrays.filter(array, function (item, index) {
return item > 3 && item < 8; // OR return a Promise
}).then(function (result) {
console.log(result); // [4, 5, 6, 7]
});
Test
$ npm test
License
This software is released under the MIT License.
Copyright © 2015 Sallar Kaboli <[email protected]>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the “Software”), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.