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intersectionWith

TS JS Deno

Returns a list of 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.

typescript
const intersectionWith = (
  a: any[],
  b: any[],
  comp: (a: any, b: any) => boolean
) => a.filter((x) => b.findIndex((y) => comp(x, y)) !== -1);
typescript
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]