Get list of items in one list that are not in another [closed]

Answer 1

You can filter the possible list.

if the lists are strings, split or match them to get arrays.

var possible=[1,2,3,4],
selected=[2,4];

var unchosen=possible.filter(function(itm){
  return selected.indexOf(itm)==-1;
});

unchosen

/*  returned value: (Array)
1,3
*/