Ds\Deque::shift
Removes and returns the first value
説明
public mixed Ds\Deque::shift()
戻り値
The first value, which was removed.
エラー / 例外
UnderflowException if empty.
例
例1 Ds\Deque::shift example
<?php
$deque = new \Ds\Deque(["a", "b", "c"]);
var_dump($deque->shift());
var_dump($deque->shift());
var_dump($deque->shift());
?>
string(1) "a"
string(1) "b"
string(1) "c"