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Verify if content of 2 lists/arrays are eaqual

/ Published in: JavaScript
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listsEqual(["1","2"], ["1","2"]) is true;

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  1. var listsEqual = function(list1, list2){
  2.     var differences = 0;
  3.     // check if all elements from first list exists in the second
  4.     for(var i=0; i<list1.length;i++){   
  5.         var exists = false;
  6.         for(var j=0; j<list2.length; j++){
  7.             if(list1[i] == list2[j]){
  8.                 exists = true;
  9.                 break;
  10.             }
  11.         }
  12.         if(!exists){
  13.             differences++;
  14.             break;
  15.         }
  16.     }
  17.     // and vice versa
  18.     if(differences == 0){
  19.         for(var i=0; i<list2.length;i++){
  20.             var exists = false;
  21.             for(var j=0; j<list1.length; j++){
  22.                 if(list2[i] == list1[j]){
  23.                     exists = true;
  24.                     break;
  25.                 }
  26.             }
  27.             if(!exists){
  28.                 differences++;
  29.                 break;
  30.             }
  31.         }
  32.     }
  33.     return differences == 0;
  34. }

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