array.prototype.reduce

    1.0.3 • Public • Published

    array.prototype.reduce Version Badge

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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

    57

    Version

    1.0.3

    License

    MIT

    Unpacked Size

    25.7 kB

    Total Files

    17

    Last publish

    Collaborators

    • ljharb