intersection javascript Code Snippet in 2024
arrayintermediate
Last Updated: 4 December 2024
Returns the elements that exist in both arrays, filtering duplicate values.
- Create a
Setfromb, then useArray.prototype.filter()onato only keep values contained inb.
const intersection = (a, b) => {
const s = new Set(b);
return [...new Set(a)].filter(x => s.has(x));
};intersection([1, 2, 3], [4, 3, 2]); // [2, 3]
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