Ds\Set::sort

(PECL ds >= 1.0.0)

Ds\Set::sort Sorts the set in-place

說明

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

Sorts the set 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\Set::sort() example

<?php
$set 
= new \Ds\Set([45132]);
$set->sort();

print_r($set);
?>

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::sort() example using a comparator

<?php
$set 
= new \Ds\Set([45132]);

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

print_r($set);
?>

以上例程的輸出類似于:

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