| public static mapKeyValue ( $traversable, callable $fn ) : array | ||
| $traversable | ||
| $fn | callable | |
| return | array | |
public static function mapKeyValue($traversable, callable $fn)
{
self::invariant(is_array($traversable) || $traversable instanceof \Traversable, __METHOD__ . ' expects array or Traversable');
$map = [];
foreach ($traversable as $key => $value) {
list($newKey, $newValue) = $fn($value, $key);
$map[$newKey] = $newValue;
}
return $map;
}