PHP | Ds\Deque::first() Function
November 29, 2020
Hello dear readers! welcome back to another edition of our tutorial on PHP. In this tutorial guide, we are going to be discussing about the Ds Deque first() Function in PHP.
The built-in PHP Ds Deque first() function can return the first value in the deque.
The built-in PHP Ds Deque first() function can return the first value in the deque.
Parameter Details
This built-in PHP function have no parameter.
Syntax
Following below is the syntax to use this function -
public mixed Ds\Deque::first( void )
Return Value
This PHP function returns the first value in the deque. This function can throw an UnderflowException if empty.
Example1
Try out the below example -
<?php $deque = new \Ds\Deque([10, 20, 8, 40, 50, 5]); echo("The elements in the deque: \n"); print_r($deque); echo("\n The first element in the deque:"); var_dump($deque->first()); ?>
Example2
Try the following example -
<?php $deque = new \Ds\Deque(["Web", "Design", "Tutorialz"]); echo("The elements in the deque: \n"); print_r($deque); echo("\n The first element in the deque:"); var_dump($deque->first()); ?>
Alright guys! This is where we are rounding up for this tutorial post. In our next tutorial guide, we are going to be discussing about the Ds Deque get() Function in PHP.
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Do feel free to ask your questions where necessary and i will attend to them as soon as possible. If this tutorial was helpful to you, you can use the share button to share this tutorial.
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Thanks for reading and bye for now.