在散列中的小写键值之前对大写字母进行排序 [英] sort upper case just before lowercase key values from a hash

问题描述

示例：

$ b我有一个散列，我想根据大写字母出现在小写字母前面的键进行排序。
$ b

JANE

jane

JIM

jim

解决方案

要按顺序获取密钥，请对散列的键应用 sort 并使用自定义排序函数。

  my％hash =（JANE => 1，jane => 2，JIM => 3，jim => ; 4）; 
 my @sorted_keys = sort {
 lc $ a cmp lc 
 $ b || $ a cmp 
 $ b}键％hash; 
  

自定义排序功能首先比较字符串，就好像它们是相同的大小写，如果相等，则考虑大小写。

I have an hash and i want to sort based on the keys with upper case words appearing just before the lowercase words.

Example:

JANE
jane
JIM
jim

解决方案

To get the keys in order, apply sort with a custom sort function on the keys of the hash.

my %hash = ( JANE => 1, jane => 2, JIM => 3, jim => 4 );
my @sorted_keys = sort {
    lc $a cmp lc $b
        || $a cmp $b
} keys %hash;

This custom sort function compares strings first as if they were of the same case, and if equal, takes case into account.

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