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());
?>
설명
public array Ds\Map::toArray
( void
)
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.
인수
이 함수는 인수가 없습니다.
반환값
An array containing all the values in the same order as the map.
예제
Example #1 Ds\Map::toArray() example
<?php
$map = new \Ds\Map([
"a" => 1,
"b" => 2,
"c" => 3,
]);
var_dump($map->toArray());
?>
위 예제의 출력 예시:
array(3) {
["a"]=>
int(1)
["b"]=>
int(2)
["c"]=>
int(3)
}
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User Contributed Notes 1 note
foalford at gmail dot com ¶
4 years ago
