Ds\Deque::unshift
(PECL ds >= 1.0.0)
Ds\Deque::unshift — Adds values to the front of the deque
説明
Adds values to the front of the deque, moving all the current values forward to make room for the new values.
パラメータ
values
-
The values to add to the front of the deque.
注意:
Multiple values will be added in the same order that they are passed.
戻り値
値を返しません。
例
例1 Ds\Deque::unshift() example
<?php
$deque = new \Ds\Deque([1, 2, 3]);
$deque->unshift("a");
$deque->unshift("b", "c");
print_r($deque);
?>
上の例の出力は、 たとえば以下のようになります。
Ds\Deque Object ( [0] => b [1] => c [2] => a [3] => 1 [4] => 2 [5] => 3 )
+add a note
User Contributed Notes 1 note
hugo at fc dot up dot pt ¶
4 years ago
Where the documentation says "moving all the current values forward", while it sounds like the complexity would be O(N), I checked the code at https://github.com/php-ds/ext-ds/blob/master/src/ds/ds_deque.c#L366 and it is in fact O(1) for each element
↑ and ↓ to navigate •
Enter to select •
Esc to close
Press Enter without
selection to search using Google