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  1. Drupal Core 11.1.x
  2. DoubleEndedQueueInterface.php

function DoubleEndedQueueInterface::peekFirst

Retrieves, but does not remove, the head of this queue, or returns `null` if this queue is empty.

Return value

T | null the head of this queue, or `null` if this queue is empty.

1 method overrides DoubleEndedQueueInterface::peekFirst()
DoubleEndedQueue::peekFirst in vendor/ramsey/collection/src/DoubleEndedQueue.php

File

vendor/ramsey/collection/src/DoubleEndedQueueInterface.php, line 304

Class

DoubleEndedQueueInterface
A linear collection that supports element insertion and removal at both ends.

Namespace

Ramsey\Collection

Code

public function peekFirst() : mixed;
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