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<?php declare(strict_types=1); |
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namespace Zalas\Toolbox\Tool; |
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use Countable; |
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use IteratorAggregate; |
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use Traversable; |
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class Collection implements IteratorAggregate, Countable |
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{ |
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/** |
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* @var array |
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*/ |
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private $elements; |
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private function __construct(array $elements) |
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{ |
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$this->elements = $elements; |
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} |
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public static function create(array $elements): Collection |
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{ |
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return new self($elements); |
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} |
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public function getIterator(): Traversable |
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{ |
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yield from $this->elements; |
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} |
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public function merge(Collection $other): Collection |
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{ |
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return self::create(\array_merge($this->elements, $other->elements)); |
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} |
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public function filter(callable $f): Collection |
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{ |
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return self::create(\array_values(\array_filter($this->elements, $f))); |
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} |
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public function map(callable $f): Collection |
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{ |
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return self::create(\array_map($f, $this->elements)); |
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} |
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public function reduce($initial, callable $param) |
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{ |
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return \array_reduce($this->elements, $param, $initial); |
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} |
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public function sort(callable $f): Collection |
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{ |
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$elements = $this->elements; |
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usort($elements, $f); |
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return self::create($elements); |
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} |
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public function toArray(): array |
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{ |
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return $this->elements; |
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} |
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public function count(): int |
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{ |
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return \count($this->elements); |
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} |
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public function empty(): bool |
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{ |
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return empty($this->elements); |
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} |
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} |
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jakzal /
toolbox
