Całkowicie usuń duplikat elementu z tablicy
var array = [1, 2, 3, 4, 4, 5, 5],
result = array.filter(function (v, _, a) {
return a.indexOf(v) === a.lastIndexOf(v);
});
console.log(result); // [1, 2, 3]
Delightful Dotterel