Ensure `contains` works with a `fromIndex` for objects.
Add doc note to `isEqual` about not supporting comparing DOM nodes or functions. [ci skip]
Ensure functions created by `matches` don't error when comparing falsey `object` values.
Add `partitionInitializer` helper.
Add `arrayEach`, `arrayEachRight` and `arrayMap` helpers.
Doc nit for `pairs`.
Add mutation notes to `pull` and `remove`.
Ensure the `underscore` build of `memoize` requires `func` to be a function.
Whitespace nits.
Inline `partitionInitializer`.
Simplify `contains`.