Ds \ Deque::pop()函數是PHP中的內置函數,用於從Deque中刪除最後一個元素(如果Deque不為空)並返回它。如果Deque為空,則拋出異常。
用法:
public Ds\Deque::pop( void ):mixed
參數:該函數不接受任何參數。
返回值:此函數返回從雙端隊列中刪除的最後一個元素。
以下示例程序旨在說明PHP中的Ds \ Deque::pop()函數:
程序1:
<?php
// Declare a deque
$deck = new \Ds\Deque([10, 20, 30, 40, 50, 60]);
echo("Elements of Deque\n");
// Display the Deque elements
print_r($deck);
// last element in the deque
echo("\nLast element of deque:");
// Use pop() function to removing last
// element from Deque and Display it
print_r($deck->pop());
echo("\nElements of Deque\n");
// Display the Deque elements
print_r($deck);
?>
輸出:
Elements of Deque Ds\Deque Object ( [0] => 10 [1] => 20 [2] => 30 [3] => 40 [4] => 50 [5] => 60 ) Last element of deque:60 Elements of Deque Ds\Deque Object ( [0] => 10 [1] => 20 [2] => 30 [3] => 40 [4] => 50 )
程序2:
<?php
// Declare a deque
$deck = new \Ds\Deque(["geeks", "for", "geeks", "practice"]);
echo("Elements of Deque\n");
// Display the Deque elements
print_r($deck);
// last element in the deque
echo("\nLast element of deque:");
// Use pop() function to removing last
// element from Deque and Display it
print_r($deck->pop());
echo("\nElements of Deque\n");
// Display the Deque elements
print_r($deck);
?>
輸出:
Elements of Deque Ds\Deque Object ( [0] => geeks [1] => for [2] => geeks [3] => practice ) Last element of deque:practice Elements of Deque Ds\Deque Object ( [0] => geeks [1] => for [2] => geeks )
參考: http://php.net/manual/en/ds-deque.pop.php
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注:本文由純淨天空篩選整理自barykrg大神的英文原創作品 PHP | Ds\Deque pop() Function。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。