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

I am not sure it should be but I just found that 
42 ~~  [23, 17, "42x", 70]

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will give you a warning 
Argument "42x" isn't numeric in smart match

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It is the described behavior as this is Num ~~ Array case but I wonder why it is doing == and not smart matching on each individual element of the Array?

Update

Since then I had another issue with smart matching: "42" ~~ "42.0" is false in 5.10 and I have written a few blog entries too about Smart Matching and Switching in Perl 5.10. If someone is interested...

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Re: Smart Match is not recursive in 5.10
by polettix (Vicar) on Dec 22, 2007 at 12:33 UTC
    While I don't know why (efficiency, I presume, or simplicity, or simply nobody tought about it, or whatever), I was thinking that recursively applying the smart match on each individual element would allow smart-matching over a "complicated" data structure, like a matrix. Something like:
       42 ~~ [
           [ 0  .. 9 ],
           [ 20 .. 29 ],
           [ 40 .. 49 ],
         ]

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    I'm still wondering if this could be named a feature or a bug, anyway :D

    Hey! Up to Dec 16, 2007 I was named frodo72, take note of the change! Flavio
    perl -ple'$_=reverse' <<<ti.xittelop@oivalf

    Io ho capito... ma tu che hai detto?
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Re: Smart Match is not recursive in 5.10
by mikfire (Deacon) on Dec 24, 2007 at 14:38 UTC
    When did you build? How did you generate this error? I am trying it like this: 
     perl -E 'say 42 ~~ [23,17,"42x",70]'

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    and generating no error. It actually returns true, like I would expect.
    mikfire
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      It's a warning, not an error. Try it with warnings enabled.

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