Ds\Sequence::sorted

(PECL ds >= 1.0.0)

Ds\Sequence::sorted — Returns a sorted copy

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

Returns a sorted copy, using an optional comparator function.

comparator: 在第一個參數小於，等於或大於第二個參數時，該比較函式必須相應地返回一個小於，等於或大於 0 的整數。

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.

Returns a sorted copy of the sequence.

示例 #1 Ds\Sequence::sorted() example


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

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

以上例程的輸出類似於：

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

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


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

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

print_r($sorted);
?>

以上例程的輸出類似於：

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