How can I remove all whitespaces and linebreaks in Perl?

Question

I have a string that looks like this...

"
http://www.example.com/

example.pdf"

I need to remove the whitespaces and linebreaks. How do I do this? My result should be

"http://www.example.com/example.pdf"

Answer 1

Just use the s/// substitution operator:

$string =~ s/\s+//g;

The \s character class matches a whitespace character, the set [\ \t\r\n\f] and others.