Ds\Set::sorted

(PECL ds >= 1.0.0)

Ds\Set::sorted — Returns a sorted copy

說明

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

Returns a sorted copy, using an optional comparator function.

參數(shù)

comparator

在第一個參數(shù)小于，等于或大于第二個參數(shù)時，該比較函數(shù)必須相應地返回一個小于，等于或大于 0 的整數(shù)。

callback(mixed $a, mixed $b): int
警告

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.

返回值

Returns a sorted copy of the set.

范例

示例 #1 Ds\Set::sorted() example

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

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

以上例程的輸出類似于：

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

示例 #2 Ds\Set::sorted() example using a comparator

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

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

print_r($sorted);
?>

以上例程的輸出類似于：

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