Sorts the set in-place

public Ds\Set::sort ([ callable $comparator ] ) : void

Sorts the set in-place, using an optional comparator function.

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callback ( mixed $a, mixed $b ) : int

Caution
Returning non-integer values from the comparison function, such as float, will result in an internal cast to integer of the callback's return value. So values such as 0.99 and 0.1 will both be cast to an integer value of 0, which will compare such values as equal.

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Example #1 Ds\Set::sort() example


<?php
$set = new \Ds\Set([4, 5, 1, 3, 2]);
$set->sort();

print_r($set);
?>

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Ds\Set Object
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
    [4] => 5
)

Example #2 Ds\Set::sort() example using a comparator


<?php
$set = new \Ds\Set([4, 5, 1, 3, 2]);

$set->sort(function($a, $b) {
    return $b <=> $a;
});

print_r($set);
?>

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Ds\Set Object
(
    [0] => 5
    [1] => 4
    [2] => 3
    [3] => 2
    [4] => 1
)

Ds\Set::sort