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

Saad Akbar

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.

PHP is a scripting language that allows web developers to create effective and interactive web pages that deal with databases. It acts as a competitive alternative to Microsoft ASP. It is an open-source scripting language that acts as a core part of WordPress and helps run one of the largest and most popular social networks: Facebook.

PHP provides an in-built library called Data Structures. It provides efficient Data Structures beyond the arrays to streamline the workflow in PHP and make it more efficient.

Among several data structures, it provides Ds\Set, which is an implementation of sets. In this shot we are going to discuss the get() function of the Ds\Set class.

get() function

The get() function is an in-built function used to get the value in the set instance at a defined index.

public Ds\Set::get(int $index): mixed

Parameter

It takes in a single parameter that is the index of the required value.

Return value

It returns the value present at the index provided as the argument. It throws an OutOfRangeException if the index is not valid.

Example

The following code illustrates the functionality of get().

<?php
$set = new \Ds\Set([10, 20, 30, 40]);
// Print set elements
var_dump($set);
// Print value at the given index
echo "Index 3 contains : ";
print_r($set->get(3));
?>

Output

object(Ds\Set)#1 (4)
{
    [0] => int(10)
    [1] => int(20)
    [2] => int(30)
    [3] => int(40)
}
Index 3 contains: 40

First, the set is declared and populated with elements. Then elements are displayed. Following this, the get() function is called to print the value at a particular index.

RELATED TAGS

php
communitycreator

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.

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