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0.2.0 • Published 11 years ago

index-of

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MIT
Version
0.2.0
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Native alternativeArray.prototype.indexOf — Use native JavaScript (Node 0.10.0+) Documentation
SummaryDependencyVersions

index-of NPM version

Get the index of the first element in an array that returns truthy for the given value, using strict equality for comparisons.

Install

Install with npm

$ npm i index-of --save

Install with bower

$ bower install index-of --save

Usage

var indexOf = require('index-of');

indexOf(['a', 'b', 'c'], 'b');
//=> 1

indexOf(['a', 'b', 'c'], 'd');
//=> -1

indexOf(['a', 'b', 'c', 'a', 'b', 'c'], 'b', 2);
//=> 4

Related projects

Other object utils:

  • array-every: Returns true if the callback returns truthy for all elements in the given array.
  • array-slice: Array-slice method. Slices array from the start index up to, but not including, the end… more
  • array-unique: Return an array free of duplicate values. Fastest ES5 implementation.
  • filter-array: Iterates over the elements in an array, returning an array with only the elements for… more

Running tests

Install dev dependencies:

$ npm i -d && npm test

Contributing

Pull requests and stars are always welcome. For bugs and feature requests, please create an issue

Author

Jon Schlinkert

License

Copyright 2015 Jon Schlinkert Released under the MIT license.

This file was generated by verb-cli on June 22, 2015.

Keywords

arrayindexindex-ofjavascriptjsutilutils