Match regex and assign results in single line of code

Question

I want to be able to do a regex match on a variable and assign the results to the variable itself. What is the best way to do it?

I want to essentially combine lines 2 a

Answer 1

From Perl Cookbook 2nd ed 6.1 Copying and Substituting Simultaneously

$dst = $src;
$dst =~ s/this/that/;

becomes

($dst = $src) =~ s/this/that/;

I just assumed everyone did it this way, amazed that no one gave this answer.