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JavaScript - Arrays - Array Diff

var difference = function(compare){
  return Array.from(arguments).reduce(function(previous, current){
    return previous.filter(function(element){
      return current.indexOf(element) == -1;
    });
  });
};

NOTE: You can also use a reusable component called array-diff:

diff([1,2,3], [1,2,3,4,5]) // => [4,5]