Release History 1.0.0 — 2015-07-28 — Stable Consider stable singleton constructure .contains, .containsNot, .every and .some methods 0.2.0 — 2015-04-21 — filter 0.1.0 — 2015-03-21 — append 0.0.2 — 2014-12-20 — Fixed fold 0.0.1 — 2014-12-20 — Initial release