Perl 编程/关键字/cmp

该cmp关键字

cmp是一个二元函数，它返回-1, 0，或者1取决于左边的参数在字符串上是否小于、等于或大于右边的参数。换句话说，cmp在文本上做与二元函数<=>相同的事情。

语法

  EXPRESSION cmp EXPRESSION

示例

代码

use strict;
use warnings;

my @array = ("Hotel", "Alpha", "Foxtrott", "Bravo", "India", "Charlie", "10", "-10", "9", "-9", "Echo", "Delta");

my @sorted_array = (sort { $a cmp $b } @array);

print join(",", @sorted_array), "\n";

返回按字母顺序排序的数组内容

-10, 10, Alpha, Bravo, Charlie, Delta, Echo, Foxtrott, Hotel, India

另请参阅

• 排序