Sorts the set in-place

# Ds\Set::sort

(PECL ds >= 1.0.0)

Ds\Set::sort — Sorts the set in-place

### Description

public Ds\Set::sort(callable `$comparator` = ?): void

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

### Parameters

`comparator`

  The comparison function must return an integer less than, equal to, or greater than zero if the first argument is considered to be respectively less than, equal to, or greater than the second.

  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 int 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.

### Return Values

No value is returned.

### Examples

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

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

The above example will output something similar to:

    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);
?>`

The above example will output something similar to:

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

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