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<?php |
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namespace Narrowspark\Arr; |
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use Narrowspark\Arr\Traits\SplitPathTrait; |
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use Narrowspark\Arr\Traits\ValueTrait; |
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class Transform |
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{ |
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/** |
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* Dotted array cache. |
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* |
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* @var array |
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*/ |
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protected $dotted = []; |
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/** |
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* Swap two elements between positions. |
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* |
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* @param array $array array to swap |
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* @param string $swapA |
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* @param string $swapB |
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* |
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* @return array|null |
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*/ |
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public function swap(array $array, $swapA, $swapB) |
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{ |
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list($array[$swapA], $array[$swapB]) = [$array[$swapB], $array[$swapA]]; |
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} |
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/** |
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* Indexes an array depending on the values it contains. |
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* |
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* @param array $array |
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* @param callable $callback Function to combine values. |
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* @param bool $overwrite Should duplicate keys be overwritten? |
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* |
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* @return array Indexed values. |
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*/ |
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public function combine(array $array, callable $callback, $overwrite = true) |
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{ |
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$combined = []; |
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foreach ($array as $key => $value) { |
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$combinator = call_user_func($callback, $value, $key); |
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$index = $combinator->key(); |
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if ($overwrite || !isset($combined[$index])) { |
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$combined[$index] = $combinator->current(); |
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} |
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} |
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return $combined; |
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} |
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/** |
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* Collapse an array of arrays into a single array. |
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* |
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* @param array $array |
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* |
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* @return array |
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*/ |
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public function collapse(array $array) |
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{ |
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$results = []; |
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foreach ($array as $values) { |
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if (!is_array($values)) { |
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continue; |
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} |
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$results = array_merge($results, $values); |
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} |
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return $results; |
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} |
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/** |
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* Divide an array into two arrays. One with keys and the other with values. |
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* |
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* @param array $array |
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* |
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* @return array[] |
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*/ |
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public function divide($array) |
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{ |
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return [array_keys($array), array_values($array)]; |
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} |
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/** |
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* Reindexes a list of values. |
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* |
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* @param array $array |
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* @param array $map An map of correspondances of the form |
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* ['currentIndex' => 'newIndex']. |
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* @param bool $keepUnmapped Whether or not to keep keys that are not |
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* remapped. |
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* |
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* @return array |
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*/ |
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public function reindex(array $array, array $map, $keepUnmapped = true) |
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{ |
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$reindexed = $keepUnmapped |
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? $array |
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: []; |
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foreach ($map as $from => $to) { |
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if (isset($array[$from])) { |
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$reindexed[$to] = $array[$from]; |
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} |
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} |
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return $reindexed; |
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} |
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/** |
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* Merges two arrays recursively. |
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* |
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* @param array $first Original data. |
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* @param array $second Data to be merged. |
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* |
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* @return array |
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*/ |
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public function merge(array $first, array $second) |
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{ |
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foreach ($second as $key => $value) { |
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$shouldBeMerged = ( |
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isset($first[$key]) |
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&& is_array($first[$key]) |
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&& is_array($value) |
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); |
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$first[$key] = $shouldBeMerged |
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? $this->merge($first[$key], $value) |
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: $value; |
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} |
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return $first; |
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} |
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/** |
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* Extend one array with another. |
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* |
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* @param array $arrays |
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* |
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* @return array |
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*/ |
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public function extend(array $arrays) |
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{ |
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$merged = []; |
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foreach (func_get_args() as $array) { |
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foreach ($array as $key => $value) { |
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if (is_array($value) && (new Access())->has($merged, $key) && is_array($merged[$key])) { |
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$merged[$key] = $this->extend($merged[$key], $value); |
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} else { |
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$merged[$key] = $value; |
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} |
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} |
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} |
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return $merged; |
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} |
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/** |
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* Flatten a multi-dimensional associative array with dots. |
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* |
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* @param array $array |
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* @param string $prepend |
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* |
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* @return array |
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*/ |
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public function dot($array, $prepend = '') |
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{ |
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$cache = serialize(['array' => $array, 'prepend' => $prepend]); |
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if (array_key_exists($cache, $this->dotted)) { |
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return $this->dotted[$cache]; |
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} |
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$results = []; |
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View Code Duplication |
foreach ($array as $key => $value) { |
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if (is_array($value)) { |
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$results = array_merge($results, $this->dot($value, $prepend . $key . '.')); |
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} else { |
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$results[$prepend . $key] = $value; |
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} |
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} |
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return $this->dotted[$cache] = $results; |
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} |
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/** |
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* Flatten a nested array to a separated key. |
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* |
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* @param array $array |
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* @param string|null $separator |
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* @param string $prepend |
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* |
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* @return array |
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*/ |
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public function flatten(array $array, $separator = null, $prepend = '') |
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{ |
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$flattened = []; |
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View Code Duplication |
foreach ($array as $key => $value) { |
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if (is_array($value)) { |
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$flattened = array_merge($flattened, $this->flatten($value, $separator, $prepend . $key . $separator)); |
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} else { |
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$flattened[$prepend . $key] = $value; |
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} |
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} |
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return $flattened; |
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} |
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} |
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This check looks from parameters that have been defined for a function or method, but which are not used in the method body.