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Ds\Map::remove
(PECL ds >= 1.0.0)
Ds\Map::remove — Removes and returns a value by key
说明
public Ds\Map::remove(mixed$key, mixed $default = ?): mixed
Removes and returns a value by key, or return an optional default value if the key could not be found.
注意:
Keys of type object are supported. If an object implements Ds\Hashable, equality will be determined by the object's
equalsfunction. If an object does not implement Ds\Hashable, objects must be references to the same instance to be considered equal.
警告注意:
You can also use array syntax to access values by key, eg.
$map["key"].
Be careful when using array syntax. Scalar keys will be coerced to
integers by the engine. For example, $map["1"] will attempt
to access int(1), while $map->get("1") will
correctly look up the string key.
See Arrays.
参数
-
key -
The key to remove.
-
default -
The optional default value, returned if the key could not be found.
返回值
The value that was removed, or the default
value if provided and the key could not be found in the map.
错误／异常
OutOfBoundsException if the key could not be found and a default value was not provided.
范例
示例 #1 Ds\Map::remove() example
<?php
$map = new \Ds\Map(["a" => 1, "b" => 2, "c" => 3]);
var_dump($map->remove("a")); // 1
var_dump($map->remove("e", 10)); // 10 (default used)
?>
以上例程的输出类似于：
int(1) int(10)
User Contributed Notes 1 note
up down 0 carlo dot revelli at berkeley dot edu ¶2 years ago
Note the syntax
<?php
unset($map[$key]);
?>
is also valid and ran 2x faster on my machine
add a note
官方地址：https://www.php.net/manual/en/ds-map.remove.php