friends-of-reactphp / partial Goto Github PK

Is anyone interested in changes that would package current functionality into a class that is constructed with a callable and an integer for arity? This would let us implement the __invoke magic method to allow lifting the partial by binding passed in arguments and returning $this unless the arity has been reduced to 0, in which case we would actually execute. For example:

$map = new Partial('array_map', 2);
$inc = $map(function($x) { return $x++; });
$inc([1, 2, 3]); // returns [2, 3, 4]

We would reduce the arity by the count of non-placeholder arguments passed in each time:

$sub = new Partial('substr', 3);
$chunk2 = $sub(…, …, 2);
$last2 = $chunk(…, -2);
$last2('lol'); // 'ol'

I suppose you could make the method to execute the internal callable public and default the arity to unbounded, so that it's possible to pass along a filter with array_diff. Someone would just have to call a method at the end like evaluate(), or the previous actor would call something like finalize() which would fix the arity to 0 and fail if there were still any Placeholders.

Comments? I am issuing a request for them.

What about a PHP 5.6 version that uses argument unpacking and direct function invocation. Did that for functional-php and it makes the code significantly nicer (and also slightly faster): lstrojny/functional-php@bfd7cae