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Ds\Deque::unshift

(PECL ds >= 1.0.0)

Ds\Deque::unshiftAdds values to the front of the deque

Descrierea

public Ds\Deque::unshift ([ mixed $values ] ) : void

Adds values to the front of the deque, moving all the current values forward to make room for the new values.

Parametri

values

The values to add to the front of the deque.

Notă:

Multiple values will be added in the same order that they are passed.

Valorile întoarse

Nu este întoarsă nici o valoare.

Exemple

Example #1 Ds\Deque::unshift() example

<?php
$deque 
= new \Ds\Deque([123]);

$deque->unshift("a");
$deque->unshift("b""c");

print_r($deque);
?>

Exemplul de mai sus va afișa ceva similar cu:

Ds\Deque Object
(
    [0] => b
    [1] => c
    [2] => a
    [3] => 1
    [4] => 2
    [5] => 3
)
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User Contributed Notes 1 note

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hugo at fc dot up dot pt
3 months 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
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