Question

How to find elements which are in array2 and not in array1 in JavaScript

Answer 1

const arr1 = [1, 3, 8,  9, 17, 18];
const arr2 = [1, 8, 5, 12, 18, 19, 100, 120];

let notinarr1 = arr2.filter(function(obj) { return arr1.indexOf(obj) == -1; });
        
console.log(notinarr1);
  
  
  
/*
run:
  
[ 5, 12, 19, 100, 120 ]
  
*/

 

 

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