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arrayFirst Array firstly returns only first items which are matched.

Knockout js Array First

Array firstly returns only first items which are matched.
For Example
  var findSelectedCodeSetFromLabel = function (label, codeSet) {
         try {
                 if (codeSet != null && codeSet.length > 0) {
                     return ko.utils.arrayFirst(codeSet, function (item) {
                         return (item.Label.toLowerCase().indexOf(label.toLowerCase()) > -1);
                     });
                 };
          }
          catch (ex) {
               logExceptions(ex);
          }
  };
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