git.r.bdr.sh - rbdr/dotfiles/blob

   1 'use strict';
   2
   3 var toPosInt = require('../../number/to-pos-integer')
   4   , value    = require('../../object/valid-value')
   5
   6   , indexOf = Array.prototype.indexOf
   7   , hasOwnProperty = Object.prototype.hasOwnProperty
   8   , abs = Math.abs, floor = Math.floor;
   9
  10 module.exports = function (searchElement/*, fromIndex*/) {
  11         var i, l, fromIndex, val;
  12         if (searchElement === searchElement) { //jslint: ignore
  13                 return indexOf.apply(this, arguments);
  14         }
  15
  16         l = toPosInt(value(this).length);
  17         fromIndex = arguments[1];
  18         if (isNaN(fromIndex)) fromIndex = 0;
  19         else if (fromIndex >= 0) fromIndex = floor(fromIndex);
  20         else fromIndex = toPosInt(this.length) - floor(abs(fromIndex));
  21
  22         for (i = fromIndex; i < l; ++i) {
  23                 if (hasOwnProperty.call(this, i)) {
  24                         val = this[i];
  25                         if (val !== val) return i; //jslint: ignore
  26                 }
  27         }
  28         return -1;
  29 };