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<?php |
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namespace Narrowspark\Arr; |
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use Narrowspark\Arr\Traits\ValueTrait; |
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class Enumerator |
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{ |
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use ValueTrait; |
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/** |
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* Get a random element from the array supplied. |
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* |
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* @param array $array the source array |
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* |
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* @return mixed |
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*/ |
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public function random(array $array) |
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{ |
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if (!count($array)) { |
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return; |
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} |
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$keys = array_rand($array, 1); |
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return $this->value($array[$keys]); |
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} |
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/** |
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* Get a subset of the items from the given array. |
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* |
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* @param string[] $array |
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* @param string[] $keys |
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* |
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* @return string[] |
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*/ |
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public function only(array $array, $keys) |
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{ |
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return array_intersect_key($array, array_flip((array) $keys)); |
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} |
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/** |
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* Determines if an array is associative. |
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* |
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* @param array $array |
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* |
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* @return bool |
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*/ |
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public function isAssoc(array $array) |
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{ |
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if ($array === []) { |
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return true; |
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} |
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return array_keys($array) !== range(0, count($array) - 1); |
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} |
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/** |
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* Split an array in the given amount of pieces. |
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* |
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* @param array $array |
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* @param int $numberOfPieces |
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* @param bool $preserveKeys |
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* |
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* @return array |
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*/ |
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public function split(array $array, $numberOfPieces = 2, $preserveKeys = false) |
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{ |
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if (count($array) === 0) { |
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return []; |
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} |
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$splitSize = ceil(count($array) / $numberOfPieces); |
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return array_chunk($array, $splitSize, $preserveKeys); |
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} |
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/** |
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* Check if an array has a numeric index. |
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* |
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* @param array $array |
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* |
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* @return bool |
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*/ |
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public function isIndexed(array $array) |
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{ |
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if ($array == []) { |
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return true; |
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} |
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return !$this->isAssoc($array); |
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} |
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/** |
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* Push an item onto the beginning of an array. |
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* |
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* @param array $array |
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* @param mixed $value |
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* @param mixed $key |
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* |
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* @return array |
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*/ |
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public function prepend(array $array, $value, $key = null) |
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{ |
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if (is_null($key)) { |
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array_unshift($array, $value); |
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} else { |
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$array = [$key => $value] + $array; |
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} |
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return $array; |
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} |
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/** |
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* Replace a given pattern with each value in the array in sequentially. |
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* |
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* @param string $pattern |
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* @param array $replacements |
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* @param string $subject |
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* |
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* @return string |
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*/ |
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public function pregReplaceSub($pattern, $replacements, $subject) |
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{ |
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return preg_replace_callback($pattern, function ($match) use (&$replacements) { |
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return array_shift($replacements); |
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}, $subject); |
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} |
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/** |
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* A shorter way to run a match on the array's keys rather than the values. |
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* |
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* @param string $pattern |
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* @param array $input |
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* @param int $flags |
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* |
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* @return array |
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*/ |
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public function pregGrepKeys($pattern, array $input, $flags = 0) |
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{ |
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return array_intersect_key($input, array_flip(preg_grep($pattern, array_keys($input), $flags))); |
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} |
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/** |
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* Return the closest found value from array. |
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* |
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* @param array $array |
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* @param sting $value |
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* |
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* @return mixed |
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*/ |
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public function closest(array $array, $value) |
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{ |
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sort($array); |
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$closest = $array[0]; |
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for ($i = 1, $j = count($array), $k = 0; $i < $j; $i++, $k++) { |
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$middleValue = ($array[$i] - $array[$k]) / 2 + $array[$k]; |
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if ($value >= $middleValue) { |
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$closest = $array[$i]; |
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} |
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} |
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return $this->value($closest); |
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} |
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} |
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narrowspark /
arr
