@bobyzgirlllnpm/quasi-et-tempora

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

Example

1var map = require('@bobyzgirlllnpm/quasi-et-tempora');
2var assert = require('assert');
3
4assert.deepEqual(map([1, 1, 1], function (x) { return x + 1; }), [2, 2, 2]);
5assert.deepEqual(map([1, 0, 1], function (x) { return x + 1; }), [2, 1, 2]);

1var map = require('@bobyzgirlllnpm/quasi-et-tempora');
2var assert = require('assert');
3/* when Array#map is not present */
4delete Array.prototype.map;
5var shimmedMap = map.shim();
6assert.equal(shimmedMap, map.getPolyfill());
7var arr = [1, 2, 3];
8var add4 = function (x) { return x + 4; };
9assert.deepEqual(arr.map(add4), map(arr, add4));

1var map = require('@bobyzgirlllnpm/quasi-et-tempora');
2var assert = require('assert');
3/* when Array#map is present */
4var shimmedMap = map.shim();
5assert.equal(shimmedMap, Array.prototype.map);
6assert.deepEqual(arr.map(add4), map(arr, add4));

Tests

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