How to use Hash each function in perl

This article mainly introduces how to use the hash each function in perl, it has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, let the editor take you to understand it.

If you need to iterate over the entire hash (itemizing each element in the hash), the common way to write it is to use the each function, which returns key-value pairs as a list of two elements. Until all the elements have been accessed. When there are no new key-value pairs, each returns an empty list.

The only place to use each is in the while loop, for example:

While (($key,$value) = each% hash) {print "$key = > $value\ n";}

If you need to process hashes in turn, sort the keys. For example:

Foreach $key (sort keys% hash) {$value = $hash {$key}; print "$key = > $value\ n";} Thank you for reading this article carefully. I hope the article "how to use the Hash each function in perl" shared by the editor will be helpful to you. At the same time, I hope you will support us, pay attention to the industry information channel, and more related knowledge is waiting for you to learn!