| 'use strict'; |
| |
| var toPosInt = require('../../number/to-pos-integer') |
| , value = require('../../object/valid-value') |
| |
| , indexOf = Array.prototype.indexOf |
| , hasOwnProperty = Object.prototype.hasOwnProperty |
| , abs = Math.abs, floor = Math.floor; |
| |
| module.exports = function (searchElement/*, fromIndex*/) { |
| var i, l, fromIndex, val; |
| if (searchElement === searchElement) { //jslint: ignore |
| return indexOf.apply(this, arguments); |
| } |
| |
| l = toPosInt(value(this).length); |
| fromIndex = arguments[1]; |
| if (isNaN(fromIndex)) fromIndex = 0; |
| else if (fromIndex >= 0) fromIndex = floor(fromIndex); |
| else fromIndex = toPosInt(this.length) - floor(abs(fromIndex)); |
| |
| for (i = fromIndex; i < l; ++i) { |
| if (hasOwnProperty.call(this, i)) { |
| val = this[i]; |
| if (val !== val) return i; //jslint: ignore |
| } |
| } |
| return -1; |
| }; |
