How do I reverse the order of two words in a string?

Question

I have a string like this:

$a = "Mike , Tree "; 

I want to reverse it to "Tree, Mike".

Is there any function to do that?

Answer 1

Split the string into two strings, flip them, and rejoin them.

Or, use a regex:

$a =~ s/(.+),(.+)/\2,\1/g;