[2.3.1] - 2024-04-05

• Actually export the new itertool at the top level

[2.3.0] - 2024-04-05

• Add new dupes(iterable, keyFn?) function, which returns groups of all duplicate items in iterable.

[2.2.5] - 2024-03-07

• Add missing export for repeat

[2.2.4] - 2024-02-19

• Type output types of all itertools more precisely

[2.2.3] - 2024-01-09

Fixes a bug where some iterators would render an inputted generator unusable, causing it to no longer be consumable after the iterable returns.

Example:

function* gen() {
  yield 1;
  yield 2;
  yield 3;
  yield 4;
}

const lazy = gen();

// [1, 2]
Array.from(islice(lazy, 0, 2));

Array.from(lazy);
// ❌ Previously:    []
// ✅ Now correctly: [3, 4]

This bug only happened when the source was a generator. It did not happen on a normal iterable.

Similar bugs were present in:

• find()
• islice()
• takewhile()
• dropwhile()

No other iterables were affected by this bug. This is the same bug that was fixed in 2.2.2 for reduce(), so many thanks again for surfacing this edge case, @quangloc99! 🙏

[2.2.2] - 2024-01-09

• Fix reduce() bug where using it on a lazy generator would produce the wrong result (thanks for finding, @quangloc99 🙏!)

[2.2.1] - 2024-01-04

• Fix islice() regression where it wasn't stopping on infinite iterables (thanks for finding, @Kareem-Medhat 🙏!)

[2.2.0]

• Move to ESM by default
• Drop support for node 12.x and 14.x
  (they probably still work, but they're EoL)