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array-pad

v0.0.1

Published

Module for returning arrays with a specific length by padding values.

Downloads

8,077

Readme

array-pad

Module for returning arrays with a specific length by padding values.

Build Status

Example

var pad = require('array-pad');
var arr = pad([], 3, null); // => [null, null, null] 
arr = pad(arr, 5, 0);       // => [null, null, null, 0, 0];

Installation

Node

To install array-pad in a Node application use npm.

$ npm install array-pad

Browser

No tests available for the browser but you may try using it via webpack.

$ webpack index.js array-pad.js

Test

To run tests use npm.

$ npm install
$ npm test

Documentation

Basic Usage

Padding an array is simple as passing the desired length and an optional value to pad with. If no value is given, padded items will be set to undefined by default.

var array = pad([], 2); // => [undefined, undefined]
pad(array, 4, null);    // => [undefined, undefined, null, null]
pad(array, 1, false);   // => [undefined, undefined, null, null]

Pad Left

Pad, by default, pads values to the right side of the array via the .push() method. To pad left, perform .unshift(), pass then length as a negative integer.

pad([1,2,3], -5, 0); // => [0, 0, 1, 2, 3]

Augmenting Array

Pad will always create a new instance of the array passed in. If augmentation to the original instance is required, pass the first parameter as true.

var arr = [];
var res = pad(true, arr, 3);
res === arr; // => true

API

pad([augment], <array>, <length>, [value]);

License

MIT

Copyright (c) 2015 Christopher Turner