PHP - Ds Map first() Function

Ds\Map::first() function can return the first pair in a map.

Syntax

public Ds\Pair Ds\Map::first( void )

Ds\Map::first() function doesn't have any parameters.

Ds\Map::first() function can return the first pair in a map and throw UnderflowException if empty.

Example 1

<?php 
   $map = new \Ds\Map([1 => "Tutorials", 2 => "Point", 3 => "India"]); 
   print_r($map->first()); 
?>

Example 2

<?php 
   $map = new \Ds\Map(["first" => "Tutorials", "second" => "Point", "third" => "India"]); 
   print_r($map->first());
?>

Useful Video Courses

---

Video

PHP Online Training

45 Lectures 9 hours

Malhar Lathkar

More Detail

Video

Become PHP Facebook Developer: Password-Less Authentication

34 Lectures 4 hours

Syed Raza

More Detail

Video

Ultimate PHP & MySQL Web Development Course & OOP Coding

84 Lectures 5.5 hours

Frahaan Hussain

More Detail

Video

Learn PHP from Scratch

17 Lectures 1 hours

Nivedita Jain

More Detail

Video

E Commerce Website Development In PHP With PDO

100 Lectures 34 hours

Azaz Patel

More Detail

Video

PHP in Telugu

43 Lectures 5.5 hours

Vijay Kumar Parvatha Reddy

More Detail