Ds\Map::toArray

(PECL ds >= 1.0.0)

Ds\Map::toArray — Converts the map to an array

说明

public Ds\Map::toArray ( ) : array

Converts the map to an array.

Caution

Maps where non-scalar keys are can't be converted to an array.

Caution

An array will treat all numeric keys as integers, eg. "1" and 1 as keys in the map will only result in 1 being included in the array.

Note:
Casting to an array is not supported yet.

参数

此函数没有参数。

返回值

An array containing all the values in the same order as the map.

范例

Example #1 Ds\Map::toArray() example


<?php
$map = new \Ds\Map([
    "a" => 1,
    "b" => 2,
    "c" => 3,
]);

var_dump($map->toArray());
?>

以上例程的输出类似于：

array(3) {
  ["a"]=>
  int(1)
  ["b"]=>
  int(2)
  ["c"]=>
  int(3)
}

User Contributed Notes

foalford at gmail dot com 07-Jul-2020 06:57


When using Hashable object as $key, Map::put() will not call the Hashable::hash() on the key until later. For example



<?

class Key implements \Ds\Hashable

{

    protected $id;



    public function __construct($id)

    {

        $this->id = $id;

    }



    public function equals($obj) : bool

    {

        return $this->id == $obj->id;

    }



    public function hash()

    {

        return $this->id;

    }

}

$map = new \Ds\Map();

$myki = new Key('myki');



$map->put($myki, "Value String");



var_dump($map->get($myki));

echo 'Map::put() store the Hashable object and it cause error in toArray()'. PHP_EOL;

var_dump($map->toArray());

?>