http://www.perlmonks.org?node_id=1044736


in reply to Re: giving spaces
in thread giving spaces

There is also perlrebackslash - Perl Regular Expression Backslash Sequences and Escapes
\040 Octal escapes
\x20 or \x{20} Hexadecimal escapes
\N{U+0020} or \N{SPACE} Named or numbered characters and character sequences
[ ] Character classes
(?-x: ) (?adlupimsx-imsx:pattern)