Javascript find index of missing elements of two arrays

Question

I have the following JavaScript where I have some lists:

var deleteLinks = $(\".remove-button .remove-from-cart\");
deleteLinks.on(\'click\', function(ev){
            


        

Answer 1

If you have access to lodash, you can use _.difference to solve this in one line.

var a = ['a', 'b', 'c'],
  b = ['b'],
  result = [];
_.difference(a, b).forEach(function(t) {result.push(a.indexOf(t))});

console.log(result);