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intersectionWith javascript Code Snippet in 2023

arrayintermediate

Last Updated: 31 January 2023

Returns the elements that exist in both arrays, using a provided comparator function.

  • Use Array.prototype.filter() and Array.prototype.findIndex() in combination with the provided comparator to determine intersecting values.
const intersectionWith = (a, b, comp) => a.filter(x => b.findIndex(y => comp(x, y)) !== -1);
intersectionWith( [1, 1.2, 1.5, 3, 0], [1.9, 3, 0, 3.9], (a, b) => Math.round(a) === Math.round(b) ); // [1.5, 3, 0]

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