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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.