Ds\Map::ksorted

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Ds\Map::ksorted — Returns a copy, sorted by key

Descrierea

public Ds\Map::ksorted ([ callable $comparator ] ) : Ds\Map

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

Parametri

comparator: Funcția de comparare trebuie să întoarcă un întreg mai mic, egal cu sau mai mare decât zero dacă primul argument este considerat respectiv mai mic, egal cu sau mai mare decât al doilea argument.

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

Precauţie
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.

Valorile întoarse

Returns a copy of the map, sorted by key.

Exemple

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


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

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

Exemplul de mai sus va afișa ceva similar cu:

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

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

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

)

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


<?php
$map = new \Ds\Map([1 => "x", 2 => "y", 0 => "z"]);

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

print_r($sorted);
?>

Exemplul de mai sus va afișa ceva similar cu:

Ds\Map Object
Ds\Map Object
(
    [0] => Ds\Pair Object
        (
            [key] => 2
            [value] => y
        )

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

    [2] => Ds\Pair Object
        (
            [key] => 0
            [value] => z
        )

)