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Ds\Sequence::sort

(PECL ds >= 1.0.0)

Ds\Sequence::sort — Sorts the sequence in-place

abstract public Ds\Sequence::sort(callable $comparator = ?): void

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

comparator: La funzione di confronto deve restituire un intero minore, uguale o maggiore di zero se il primo argomento è considerato essere minore, uguale o maggiore del secondo.

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

Attenzione
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.

Nessun valore viene restituito.

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

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

print_r($sequence);
?>

Il precedente esempio visualizzerà qualcosa simile a:

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

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

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

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

print_r($sequence);
?>

Il precedente esempio visualizzerà qualcosa simile a:

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

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