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array.prototype.reduce

1.0.2 • Public • Published

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An ES5 spec-compliant Array.prototype.reduce 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.reduce depends on a receiver (the “this” value), the main export takes the array to operate on as the first argument.

Example

var reduce = require('array.prototype.reduce');
var assert = require('assert');
 
assert.equal(reduce([1, 2, 3], function (prev, x) { return prev + x; }), 6);
assert.equal(reduce([1, 2, 3], function (prev, x) { return prev + x; }, 1), 7);
var reduce = require('array.prototype.reduce');
var assert = require('assert');
/* when Array#reduce is not present */
delete Array.prototype.reduce;
var shimmed = reduce.shim();
assert.equal(shimmed, reduce.getPolyfill());
var arr = [1, 2, 3];
var sum = function (a, b) { return a + b; };
assert.equal(arr.reduce(sum), reduce(arr, sum));
assert.equal(arr.reduce(sum), 6);
assert.equal(arr.reduce(sum, 1), 7);
var reduce = require('array.prototype.reduce');
var assert = require('assert');
/* when Array#reduce is present */
var shimmed = reduce.shim();
assert.equal(shimmed, Array.prototype.reduce);
assert.equal(arr.reduce(sum), reduce(arr, sum));

Tests

Simply clone the repo, npm install, and run npm test

Install

npm i array.prototype.reduce

DownloadsWeekly Downloads

62

Version

1.0.2

License

MIT

Unpacked Size

23.1 kB

Total Files

17

Last publish

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