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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::sum function** calculates the sum of all the set’s elements.

The `Ds\Set::sum`

function can be declared as follows:

```
public Ds\Set::sum ( ) : int|float
```

The `Ds\Set::sum`

function has no input parameters.

The `Ds\Set::sum`

function returns the sum of all the set’s elements.

The code snippet below demonstrates the use of the `Ds\Set::sum`

function:

<?php$set1 = new \Ds\Set([0, 5, 10, 20]);echo("Sum of all elements of set1 = ");print_r($set1->sum());?>

Using the Ds\Set sum() function in PHP

- Line 3: We declare a set
`set1`

. - Line 6: We use the
`Ds\Set::sum`

function to return the sum of elements of`set1`

.

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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.

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