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PHP - Manual: Ds\Deque::apply

2024-05-04

Ds\Deque::apply

(PECL ds >= 1.0.0)

Ds\Deque::applyUpdates all values by applying a callback function to each value

说明

public Ds\Deque::apply(callable $callback): void

Updates all values by applying a callback function to each value in the deque.

参数

callback

callback(mixed $value): mixed

A callable to apply to each value in the deque.

The callback should return what the value should be replaced by.

返回值

没有返回值。

范例

示例 #1 Ds\Deque::apply() example

<?php
$deque 
= new \Ds\Deque([123]);
$deque->apply(function($value) { return $value 2; });

print_r($deque);
?>

以上例程的输出类似于:

Ds\Deque Object
(
    [0] => 2
    [1] => 4
    [2] => 6
)
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官方地址:https://www.php.net/manual/en/ds-deque.apply.php

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