array.prototype.foreach
v1.0.7
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An ES spec-compliant `Array.prototype.forEach` shim/polyfill/replacement that works as far down as ES3.
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array.prototype.foreach
An ES spec-compliant Array.prototype.forEach
shim/polyfill/replacement that works as far down as ES3.
This package implements the es-shim API interface. It works in an ES3-supported environment and complies with the spec.
Because Array.prototype.forEach
depends on a receiver (the this
value), the main export takes the array to operate on as the first argument.
Getting started
npm install --save array.prototype.foreach
Usage/Examples
var forEach = require('array.prototype.foreach');
var assert = require('assert');
var arr = [1, [2], [], 3, [[4]]];
var counter = 0;
var increaseCounter = function (x) { counter += 1; };
assert.equal(forEach(arr, increaseCounter), undefined);
assert.equal(counter, arr.length);
var forEach = require('array.prototype.foreach');
var assert = require('assert');
/* when Array#forEach is not present */
delete Array.prototype.forEach;
var shimmed = forEach.shim();
var counter = 0;
assert.equal(shimmed, forEach.getPolyfill());
assert.equal(arr.forEach(increaseCounter), forEach(arr, increaseCounter));
assert.equal(counter, arr.length * 2);
var forEach = require('array.prototype.foreach');
var assert = require('assert');
/* when Array#forEach is present */
var shimmed = forEach.shim();
var counter = 0;
assert.equal(shimmed, Array.prototype.forEach);
assert.equal(arr.forEach(increaseCounter), forEach(arr, increaseCounter));
assert.equal(counter, arr.length * 2);
Tests
Simply clone the repo, npm install
, and run npm test