Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

Is there anyway to make your own function that can take a block of code (without the "sub" keyword) like those functions can or are they super magical?
  • Comment on How do I pass a block like map/grep/sort/etc?

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Re: How do I pass a block like map/grep/sort/etc?
by revdiablo (Prior) on Mar 06, 2004 at 02:17 UTC
    Is there anyway to make your own function that can take a block of code

    In short, yes. perldoc perlsub, read about prototypes.

[reply]
      Sweet, I didn't know about '&', I couldn't find it when I was looking for prototypes earlier. How do these functions get away with being unprototyped though (i.e. print prototype "grep"; prints nothing).
[reply]

        Quoth perldoc -f prototype:

        If the builtin is not overridable (such as "qw//") or its arguments cannot be expressed by a prototype (such as "system") returns "undef" because the builtin does not really behave like a Perl function.
[reply]
        err I mean "CORE::grep".
[reply]

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