difference javascript Code Snippet in 2025
arraybeginner
Last Updated: 5 November 2025
Calculates the difference between two arrays, without filtering duplicate values.
- Create a
Setfrombto get the unique values inb. - Use
Array.prototype.filter()onato only keep values not contained inb, usingSet.prototype.has().
const difference = (a, b) => {
const s = new Set(b);
return a.filter(x => !s.has(x));
};difference([1, 2, 3, 3], [1, 2, 4]); // [3, 3]
javascript snippet similar to difference For You in November 2025
Subscribe to our Newsletter
Subscribe to get resources directly to your inbox. You won't receive any spam! ✌️