array.prototype.entries (original) (raw)

1.1.3 • Public • Published a year ago

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array.prototype.entries

An ES2015 spec-compliant Array.prototype.entries 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.entries depends on a receiver (the “this” value), the main export takes the array to operate on as the first argument.

Example

var entries = require('array.prototype.entries'); var assert = require('assert'); var iterate = require('iterate-iterator');

assert.deepStrictEqual(iterate(entries([1, 2, 3])), [[0, 1], [1, 2], [2, 3]]); assert.deepStrictEqual(iterate(entries([1, 0, 1])), [[0, 1], [1, 0], [2, 1]]); assert.deepStrictEqual(iterate(entries([NaN])), [[0, NaN]]); assert.deepStrictEqual(iterate(entries([1,,3])), [[0, 1], [1, undefined], [2, 3]]);

var entries = require('array.prototype.entries'); var assert = require('assert'); /* when Array#entries is not present */ delete Array.prototype.entries; var shimmedMap = entries.shim(); assert.deepStrictEqual(shimmedMap, entries.getPolyfill()); assert.deepStrictEqual(iterate([1, 2, 3].entries()), [[0, 1], [1, 2], [2, 3]]); assert.deepStrictEqual(iterate([1, 0, 1].entries()), [[0, 1], [1, 0], [2, 1]]); assert.deepStrictEqual(iterate([NaN].entries()), [[0, NaN]]); assert.deepStrictEqual(iterate([1,,3].entries()), [[0, 1], [1, undefined], [2, 3]]);

var entries = require('array.prototype.entries'); var assert = require('assert'); /* when Array#entries is present */ var shimmedMap = entries.shim(); assert.equal(shimmedMap, Array.prototype.entries); assert.deepStrictEqual(iterate([1, 2, 3].entries()), [[0, 1], [1, 2], [2, 3]]);

Tests

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