Category Archives: new features

Use the \N regex character class to get “not a newline”

Perl 5.12 introduced an experimental regex character class to stand in for every character except one, the newline. The \N character class is everything but the newline. In prior versions of Perl, this is the same thing as the . meta character. That is, it’s the same as long as someone doesn’t add the /s […]

Use when() as a statement modifier

Perl 5.10 introduced the given-when statement, and Perl 5.12 refines it slightly by letting you use the when as a statement modifier. A statement modifier puts the conditional expression at the end of the statement (see perlsyn). You’ve probably already used many of these:

Perl 5.14 new features

The Perl 5 Porters released 5.14. By reading the perldelta51[34]* documentation, you can see what’s new in this maintenance version of Perl. David Golden, one of the Perl 5.13 release managers, put together what he’s calling the perldeltadelta, which is just the most interesting bits of the longish perl*delta files for Perl 5.13, the experimental […]

Perl 5.10 new features

Perl 5.10 introduced many new features that had built up over the years. Some of these we covered in the book, but we’ll cover some of those that we neglected. It might take us some time to get around to them all, but we’ll eventually make it. If you want to read about some sooner […]

Perl 5.8 features

Perl 5.8, mostly a release that improved much of the unseen things in Perl, did have some notable, user-visible features. Restricted hashes with Hash::Util (5.8.0) Use sitecustomize.pl to affect all programs (5.8.7) PerlIO is now the default (5.8.0)