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What is the DS\Vector get() method in PHP?

Talha Ashar

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 get() method of PHP’s DS\Vector class returns the value stored at a particular vector index.

The process is illustrated below:

The prototype of the get() method is shown below:

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

Parameters

The get() method takes a mandatory parameter, i.e., the vector index whose value is returned.

If the index is outside the valid range of indices for the vector, the get() method throws the OutOfRangeException.

Return value

The get() method returns the value at the specified vector index.

Example

The code below shows how the get() method works in PHP:

<?php
// initialize vector
$newVector = new \Ds\Vector([1, "abc", 10, 2, "efg"]);
print_r($newVector);
for ($i = 0; $i < 5; $i++)
{
// get value at each index
$value = $newVector->get($i);
print("The value at index " . $i . " is " . $value . ".\n");
}
?>

The code above produces the following output:

Ds\Vector Object
(
[0] => 1
[1] => abc
[2] => 10
[3] => 2
[4] => efg
)
The value at index 0 is 1.
The value at index 1 is abc.
The value at index 2 is 10.
The value at index 3 is 2.
The value at index 4 is efg.

Note: To run this program, you need to install Data Structures for PHP on your local machine.

Explanation

The vector newVector is initialized with 55 distinct values of different data types.

The for-loop proceeds to iterate over each vector index. The get() method in line 1010 is invoked during each loop iteration. Each sector value is fetched and output accordingly.

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Talha Ashar
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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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