Removes and returns a value by key

说锟斤拷

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.

Note:
Keys of type object are supported. If an object implements Ds\Hashable, equality will be determined by the object's equals function. If an object does not implement Ds\Hashable, objects must be references to the same instance to be considered equal.

Note:
You can also use array syntax to access values by key, eg. $map["key"].

Caution

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.

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key: The key to remove.
default: The optional default value, returned if the key could not be found.

锟斤拷锟斤拷值

The value that was removed, or the default value if provided and the key could not be found in the map.

锟斤拷锟斤拷锟届常

OutOfBoundsException if the key could not be found and a default value was not provided.

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Example #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)
?>

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int(1)
int(10)