array.prototype.reduce

array.prototype.reduce

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

Changelog

v1.0.5 - 2022-11-03

Commits

• [meta] use npmignore to autogenerate an npmignore file a2333c6
• [Deps] update es-abstract 86a838f
• [actions] update rebase action to use reusable workflow 4710394
• [Dev Deps] update aud, tape e2bcb57
• [Deps] update define-properties, es-abstract 4c693aa
• [Deps] update es-abstract ca5557c
• [Dev Deps] update functions-have-names dcb2d35