Function gen

data_structures/unstable_multimap_test.ts:586–590

()

Deno.test("MultiMap.groupBy() accepts an arbitrary iterable", () => {
  function* gen() {
    yield 1;
    yield 2;
    yield 3;
  }

  const grouped = MultiMap.groupBy(gen(), (n) => n % 2 === 0 ? "even" : "odd");