<?php
$set = new \Ds\Set([1, 2, 3]);
var_dump($set->merge([3, 4, 5]));
var_dump($set);
?>
The above example will output
something similar to:
object(Ds\Set)#2 (6) {
[0]=>
int(1)
[1]=>
int(2)
[2]=>
int(3)
[3]=>
int(4)
[4]=>
int(5)
}
object(Ds\Set)#1 (3) {
[0]=>
int(1)
[1]=>
int(2)
[2]=>
int(3)
}