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Re^2: while loop

by blazar (Canon)
on Apr 26, 2006 at 09:10 UTC ( #545732=note: print w/replies, xml ) Need Help??

in reply to Re: while loop
in thread while loop

Well, quite about the only answer that such a question deserves. But while you're there, and the op is clearly a newbie, please do not use the &-form of sub call, since we take care all the time of deprecating it to avoid this cargo-culted remnant from Perl 4 to spread further. If you want to underline that you're doing a sub call, then you may use empty parens...

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Re^3: while loop
by mantadin (Beadle) on Apr 26, 2006 at 10:12 UTC
    Thanks for the info; I did not know that the &-form is considered a cargo-culted remnant.

    OTOH, I am not aware of the &-form having any useful advantage. AFAIK, &f, if called from within another sub, is equivalent to f(@_) "but faster", as the camel books states (3rd edition, Chapter 6, scoping issues).

      Well, perldoc perlsub explains it all. In brief, do not use the &-form unless you know what you're doing, i.e. either circumvent prototypes, if you're giving an explicit arg list or make current @_ visible to the sub, as you say.

        ... or when dereferencing a CODEREF or a symbolic reference to a subroutine name, or taking a reference to a subroutine, or when using the subroutine as an argument to goto ...


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