Array.prototype.findIndex ES2015 polyfill.
npm install array.prototype.findindexArray.prototype.findIndex polyfillSimple ES6 Array.prototype.findIndex polyfill for older environments taken from es6-shim.
For browsers and node.js.
npm install array.prototype.findindex if you’re using node.js.component install paulmillr/Array.prototype.findIndex if you’re using component(1).bower install Array.prototype.findIndex if you’re using Twitter Bower.* Array.prototype.findIndex(predicate[, thisArg]) returns first item index that matches predicate function.
* predicate(value, index, collection): takes three arguments
* value: current collection element
* index: current collection element index
* collection: the collection
``javascript
var findIndex = require('array.prototype.findindex');
findIndex.shim(); // if you want to install it on the global environment
`
Code example:
`javascript``
// Default:
[1, 5, 10, 15].findIndex(function(a) {return a > 9;}) // 2
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Copyright (c) 2013 Paul Miller
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