loophp\fpt\Reduction

Complexity

Total Complexity

3

Size/Duplication

Total Lines	14
Duplicated Lines	0 %

Test Coverage

Coverage

100%

Importance

Changes	1
Bugs	0	Features	0

1 Method

Rating	Name	Duplication	Size	Complexity
A	of()	0	9	3

<?php

declare(strict_types=1);

namespace loophp\fpt;

use Closure;

// phpcs:disable Generic.Files.LineLength.TooLong

/**
 * @psalm-immutable
 */
final class Reduction
{
    /**
     * @psalm-pure
     */
    public static function of(): Closure
    {
        return static fn (callable ...$callables): Closure => static fn ($init = null): Closure => static function (iterable ...$iterables) use ($callables, $init) {
            foreach ($iterables as $iterable) {
                foreach ($iterable as $key => $item) {
                    yield $key => ($init = array_reduce(
                        $callables,
                        static fn ($init, callable $callback) => $callback($init, $item, $key, $iterable),
                        $init
                    ));
                }
            }
        };
    }
}