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Re^3: Canon concerning coderef calls?

by NetWallah (Abbot)
on Nov 15, 2004 at 20:19 UTC ( #407947=note: print w/ replies, xml ) Need Help??


in reply to Re^2: Canon concerning coderef calls?
in thread Canon concerning coderef calls?

Yes - you have understood the sequence correctly.

The relevant document is the "Symbol Table" section of perlmod.

The symbol table for a package happens to be stored in the hash of that name with two colons appended. The main symbol table's name is thus %main::, or %:: for short. ...

Hence "$::" is de-referencing the "%main::" hash, using "$_" as the key. The following parens prvide the "sub" context, and allow the sub to be passed the $_ param.

    Earth first! (We'll rob the other planets later)


Comment on Re^3: Canon concerning coderef calls?
Re^4: Canon concerning coderef calls?
by jobi (Scribe) on Nov 15, 2004 at 21:50 UTC
    Ah, so that's how it works...

    I didn't realize that the main package was named %main and not $main, so I didn't see the dereference there.

    Thank you for taking the time to explain, and thanks to tmoertel for granting us his wisdom in the first place.

    jobi - a little bit wiser now.

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