How to sort perl hash on values and order the keys correspondingly (in two arrays maybe)?

Question

In Perl, I want to sort the keys of a hash by value, numerically:

{
  five => 5
  ten => 10
  one => 1
  four => 4
}

producing

Answer 1

Please see the Perl FAQ entry titled "How do I sort a hash (optionally by value instead of key)"

http://perldoc.perl.org/perlfaq4.html#How-do-I-sort-a-hash-%28optionally-by-value-instead-of-key%29?

You can also use perldoc -q to search the FAQ locally on your machine, as in perldoc -q sort, which is how I found your answer.