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array.prototype.item

1.0.0 • Public • Published

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An ESnext spec-compliant Array.prototype.item 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 proposed spec.

Because Array.prototype.item depends on a receiver (the this value), the main export takes the array to operate on as the first argument.

Getting started

npm install --save array.prototype.item

Usage/Examples

var item = require('array.prototype.item');
var assert = require('assert');
 
var arr = [1, [2], [], 3];
 
var results = item(arr, function (x, i) {
    assert.equal(x, arr[i]);
    return x;
});
 
assert.deepEqual(results, [1, 2, 3]);
var item = require('array.prototype.item');
var assert = require('assert');
/* when Array#item is not present */
delete Array.prototype.item;
var shimmedFlatMap = item.shim();
 
var mapper = function (x) { return [x, 1]; };
 
assert.equal(shimmedFlatMap, item.getPolyfill());
assert.deepEqual(arr.item(mapper), item(arr, mapper));
var item = require('array.prototype.item');
var assert = require('assert');
/* when Array#item is present */
var shimmedIncludes = item.shim();
 
var mapper = function (x) { return [x, 1]; };
 
assert.equal(shimmedIncludes, Array.prototype.item);
assert.deepEqual(arr.item(mapper), item(arr, mapper));

Tests

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

Install

npm i array.prototype.item

DownloadsWeekly Downloads

6

Version

1.0.0

License

MIT

Unpacked Size

15.6 kB

Total Files

20

Last publish

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