Ds\Map::sorted

(PECL ds >= 1.0.0)

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

Descrição

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

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

Parâmetros

comparator: A função de comparação precisa retornar um inteiro menor, igual, ou maior que zero caso o primeiro argumento seja considerado respectivamente maior, igual ou maior que o segundo. Note que antes do PHP 7.0.0 este inteiro tinha de estar no intervalo de -2147483648 a 2147483647.

int callback ( mixed $a, mixed $b )

Cuidado
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.

Valor Retornado

Returns a copy of the map, sorted by value.

Exemplos

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


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

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

O exemplo acima irá imprimir algo similar à:

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
        )

)

Exemplo #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);
?>

O exemplo acima irá imprimir algo similar à:

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
        )

)