Perl 程式設計/關鍵字/cmp

該cmp關鍵字

cmp是一個二元函式，它返回-1, 0，或者1取決於左邊的引數在字串上是否小於、等於或大於右邊的引數。換句話說，cmp在文字上做與二元函式<=>相同的事情。

語法

  EXPRESSION cmp EXPRESSION

示例

程式碼

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";

返回按字母順序排序的陣列內容

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

另請參閱

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