array.prototype.findlast

1.2.5 • Public • Published

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An ESnext spec-compliant Array.prototype.findLast 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.findLast 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.findlast

Usage/Examples

var findLast = require('array.prototype.findlast');
var assert = require('assert');

var arr = [1, [2], [], 3, [[4]]];
var isNumber = function (x) { return typeof x === 'number' };

assert.deepEqual(findLast(arr, isNumber), 3);
var findLast = require('array.prototype.findlast');
var assert = require('assert');
/* when Array#findLast is not present */
delete Array.prototype.findLast;
var shimmed = findLast.shim();

assert.equal(shimmed, findLast.getPolyfill());
assert.deepEqual(arr.findLast(isNumber), findLast(arr, isNumber));
var findLast = require('array.prototype.findlast');
var assert = require('assert');
/* when Array#findLast is present */
var shimmed = findLast.shim();

assert.equal(shimmed, Array.prototype.findLast);
assert.deepEqual(arr.findLast(isNumber), findLast(arr, isNumber));

Tests

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

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Install

npm i array.prototype.findlast

Weekly Downloads

7,421,636

Version

1.2.5

License

MIT

Unpacked Size

29.1 kB

Total Files

17

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Collaborators

  • ljharb