underscore/difference

解説 bにはないaの値を返す

_defference(a, b)

Underscore.js

(function(){
  const s1Array = [2, 3, 5, 12, 9];
  const s1Array02 = new Array(2, 4, 5);
  var s1 = _.difference(s1Array, s1Array02);
  console.log(s1);//[ 3, 12, 9 ]
})();