On Thu, Nov 18, 2004 at 02:15:45PM +0100, Ing. Branislav Gerzo wrote: > Zeng Nan [ZN], on Thursday, November 18, 2004 at 13:43 (+0800) wrote > these comments: > > ZN> As said in "Learning Perl", a perl identifier is "a letter or > ZN> underscore, and then possibly more letters, or digits, or underscores". > ZN> Because of this, $123 is an invalid name, but why $000 or $000000 works? > > I think it has something to do with regular expressions, you use > $[1-9] for back references, and $0 is unused (?) >
This shouldn't be the reason, as $0 'contains the name of the program being executed'. -- Zeng Nan Simple is Beautiful. ~~~~~~~~~~~~~~~~~~~~ PGP Key: http://hobbit.homeunix.org
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