Ds\Deque::first

(PECL ds >= 1.0.0)

Ds\Deque::firstReturns the first value in the deque.

설명

public mixed Ds\Deque::first ( void )

Returns the first value in the deque.

인수

이 함수는 인수가 없습니다.

반환값

The first value in the deque.

오류/예외

UnderflowException if empty.

예제

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

<?php
$deque 
= new \Ds\Deque([123]);
var_dump($deque->first());
?>

위 예제의 출력 예시:

int(1)
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