Trusted answers to developer questions
Trusted Answers to Developer Questions

Related Tags

php
communitycreator
first()

What is the Ds\Set first() function in PHP?

Syed Muhammad Ali Mustafa

Grokking Modern System Design Interview for Engineers & Managers

Ace your System Design Interview and take your career to the next level. Learn to handle the design of applications like Netflix, Quora, Facebook, Uber, and many more in a 45-min interview. Learn the RESHADED framework for architecting web-scale applications by determining requirements, constraints, and assumptions before diving into a step-by-step design process.

The Ds\Set::first() function returns the first element of a set.

Syntax

The Ds\Set::first() function can be declared as shown in the code snippet below:

public void Ds\Set::first( void )

Parameter

The Ds\Set::first() function does not have any input parameters.

Return value

The Ds\Set::first() function returns the first element of a set.

Example

Consider the code snippet below, which demonstrates the use of the Ds\Set::first() function:

<?php
$set1 = new \Ds\Set();
$set1->add("Hello");
$set1->add("World");
$set1->add("!!");
print_r($set1->first());
?>
Implementation of Ds\Set::first() function

Explanation

  • A set, set1, is declared in line 2.

  • Elements are added to set1 in lines 3-5.

  • The Ds\Set::first() function is used in line 7 to return the first element of set1.

RELATED TAGS

php
communitycreator
first()

CONTRIBUTOR

Syed Muhammad Ali Mustafa

Grokking Modern System Design Interview for Engineers & Managers

Ace your System Design Interview and take your career to the next level. Learn to handle the design of applications like Netflix, Quora, Facebook, Uber, and many more in a 45-min interview. Learn the RESHADED framework for architecting web-scale applications by determining requirements, constraints, and assumptions before diving into a step-by-step design process.

Keep Exploring