iter 2.4.0

• Added iter\tap() function (#95).

iter 2.3.0

This release adds more precise phpdoc type annotations, using templates and specifying callable signatures (#93).

iter 2.2.0

• Compatibility with PHP 8.1.

iter 2.1.0

• Added iter\slice() method (#80). This works like explode() but produces an iterator.
• Added iter\mapWithKeys() method (#81). This works like iter\map() but also passes keys as second parameter to the callable.

iter 2.0

This release makes iter compatible with PHP 7.4 by renaming the iter\fn namespace to iter\func.

• PHP >= 7.1 is now required. Functions are annotated with iterable types. (#52)
• The iter\fn namespace has been renamed to iter\func. This is necessary for PHP 7.4 compatibility. (#79)
• Default $preserveKeys = false in chunk() and add chunkWithKeys() function.
• Avoid advancing by one additional iteration in slice(). (#75)

iter 1.6

• Added iter\enumerate() function (#43).
• Added iter\isEmpty() function (#46).
• Added $preserveKeys parameter to iter\chunk() (#42).

iter 1.5

• Added $levels argument for flatten().
• Added flatMap() function.

iter 1.4

• Fixed infinite loop when iter\zip() is called without arguments.
• Added additional error checks for various "length" and "count" parameters (usually disallowing negative numbers).
• The iter\flatten() function now preserves keys.
• Added an iter\recurse() function. Example use is iter\recurse('iter\toArray', $data) which will recursively convert an iterator to array.

iter 1.3

• Added Iterator iter\product(...$iterables):
  Returns the cartesian product iterator of the passed iterators. (#25)
• Added bool iter\isIterable(mixed $value):
  Returns whether the value is an array or Traversable.
• Added $key parameter to the callback of reduce() and reductions(). (#28)
• Added support for <=> to fn\operator(). It is also supported on PHP versions that do not natively provide a <=> operator.
• All functions now validate that inputs are iterables.

iter 1.2

• Added new iter functions:
  • mixed search(callable $predicate, iterable $iterable):
    Returns the first value from $iterable which satisfies $predicate, or null if no such element exists.
  • Iterator reductions(callable $function, iterable $iterable, mixed $startValue = null):
    Returns an iterator which contains the intermediate values produced by applying a reduction function to an iterator. Can for example be used to compute cumulative sums.
• Added support for the power operator (**) to iter\fn\operator(). Support is available also on older PHP versions which do not have an actual ** operator.