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Ternar operator used to object-detection

/ Published in: JavaScript
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  1. if (typeof ArrayUtilites == "undefined" || !ArrayUtilites) {
  2.     var ArrayUtilites = {};
  3. }
  4.  
  5. ArrayUtilites.each = (Array.prototype.forEach) ?
  6.     function (a, f, o) {
  7.         Array.prototype.forEach.call(a, f, o || ArrayUtilites);
  8.         return ArrayUtilites;
  9.     } :
  10.     function (a, f, o) {
  11.         for (var i = 0, it; it = a[i]; i=i+1) {
  12.             f.call(o || ArrayUtilites, it, i, a);
  13.         }
  14.         return ArrayUtilites;
  15.     };

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