Ds\Sequence::sort

(PECL ds >= 1.0.0)

Ds\Sequence::sort — Sorts the sequence in-place

說明

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

Sorts the sequence in-place, using an optional comparator function.

參數

comparator

在第一個參數小于，等于或大于第二個參數時，該比較函數必須相應地返回一個小于，等于或大于 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.

返回值

沒有返回值。

范例

示例 #1 Ds\Sequence::sort() example

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

print_r($sequence);
?>

以上例程的輸出類似于：

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

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

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

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

print_r($sequence);
?>

以上例程的輸出類似于：

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