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<?php |
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declare(strict_types=1); |
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namespace Cunningsoft\GenericList; |
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use ArrayIterator; |
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use InvalidArgumentException; |
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use const SORT_REGULAR; |
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use function array_merge; |
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use function array_slice; |
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use function array_unique; |
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use function array_walk; |
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use function count; |
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use function get_class; |
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use function gettype; |
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use function implode; |
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use function is_object; |
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use function is_string; |
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use function sprintf; |
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final class StringList implements ListType |
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{ |
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/** @var string[] */ |
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private $elements = []; |
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/** @param mixed[] $elements */ |
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public function __construct(iterable $elements = []) |
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{ |
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foreach ($elements as $element) { |
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if (!is_string($element)) { |
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throw new InvalidArgumentException(sprintf( |
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'Expected a string, but got: %s.', |
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is_object($element) ? get_class($element) : gettype($element), |
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)); |
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} |
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$this->elements[] = $element; |
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} |
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} |
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public function count(): int |
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{ |
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return count($this->elements); |
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} |
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public function isEmpty(): bool |
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{ |
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return $this->count() === 0; |
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} |
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public function isNotEmpty(): bool |
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{ |
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return !$this->isEmpty(); |
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} |
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public function merge(self $other): self |
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{ |
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return new self(array_merge($this->elements, $other->elements)); |
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} |
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public function slice(int $offset, ?int $length = null): self |
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{ |
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return new self(array_slice($this->elements, $offset, $length)); |
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} |
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public function distinct(): self |
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{ |
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return new self(array_unique($this->elements, SORT_REGULAR)); |
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} |
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public function walk(callable $callback): bool |
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{ |
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return array_walk($this->elements, $callback); |
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} |
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public function implode(string $glue = ''): string |
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{ |
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return implode($glue, $this->elements); |
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} |
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/** @return ArrayIterator|string[] */ |
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public function getIterator(): ArrayIterator |
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{ |
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return new ArrayIterator($this->elements); |
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} |
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} |
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cunningsoft /
generic-list
