Ds\Map::sorted

(PECL ds >= 1.0.0)

Ds\Map::sorted — Returns a copy, sorted by value

Descrizione

public Ds\Map::sorted(callable $comparator = ?): Ds\Map

Returns a copy, sorted by value using an optional comparator function.

Elenco dei parametri

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.

Valori restituiti

Returns a copy of the map, sorted by value.

Esempi

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

<?php
$map = new \Ds\Map(["a" => 2, "b" => 3, "c" => 1]);

print_r($map->sorted());
?>

Il precedente esempio visualizzerà qualcosa simile a:

Ds\Map Object
(
    [0] => Ds\Pair Object
        (
            [key] => c
            [value] => 1
        )

    [1] => Ds\Pair Object
        (
            [key] => a
            [value] => 2
        )

    [2] => Ds\Pair Object
        (
            [key] => b
            [value] => 3
        )

)

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

<?php
$map = new \Ds\Map(["a" => 2, "b" => 3, "c" => 1]);

// Reverse
$sorted = $map->sorted(function($a, $b) {
    return $b <=> $a;
});

print_r($sorted);
?>

Il precedente esempio visualizzerà qualcosa simile a:

Ds\Map Object
(
    [0] => Ds\Pair Object
        (
            [key] => b
            [value] => 3
        )

    [1] => Ds\Pair Object
        (
            [key] => a
            [value] => 2
        )

    [2] => Ds\Pair Object
        (
            [key] => c
            [value] => 1
        )

)

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