ES5 implementation of set difference for JS arrays.

array_subtract

var array_subtract = function(arr,values) {
  return arr.filter(function(x) {
    var remove = values.filter(function(v){
      return x == v;
    });
    return !remove.length>0;
  });
};

// array_subtract([1,2,3,4,5,6,7,7,'hey','b','c'],[4,6,7,'c'])
// [1, 2, 3, 5, "hey", "b"]