in reply to Re: Very quick question about names in perl
in thread Very quick question about names in perl

There are also some special package variables like $^X. All of the ones that I know of, though, have established internal meanings.

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Re: Very quick question about names in perl
by Abigail-II (Bishop) on Dec 15, 2003 at 16:44 UTC
    Those are usually considered to be punctuation variables as well.

    Abigail

[reply]
      Yes, they are called that. But they don't consist of a single punctuation character and so were not included in your listing.
[reply]
        Actually, their name exists of a single control character, although they are to be written in the source as a caret+letter. For example, for $^W, the name is ctrl-W. If anybody find this hard to believe, try looking into the stash %:: ,the keys are the names for the global variables in main::. 
        use Data::Dumper;
$Data::Dumper::Useqq = 1;
print Dumper \%::;

        [download]

        Me, I have a hard time calling a control character, a "punctuation character".

[reply]
[d/l]
        That all depends on what you consider a punctuation character. In the Perl world, it's common to consider ^A .. ^Z punctuation characters when it's comes to variable names. They follow the same rules: one letter variables, which are forced to be in the main name space.

        Don't let the fact that you may encode the name using a two character digraph make you think it's a two character name.

        Abigail

[reply]

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