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Re^3: How to check if a variable's value is equal to a member of a list of values

by LanX (Canon)
on Mar 25, 2013 at 14:28 UTC ( #1025316=note: print w/ replies, xml ) Need Help??


in reply to Re^2: How to check if a variable's value is equal to a member of a list of values
in thread How to check if a variable's value is equal to a member of a list of values

It should

  • smartmatch is implemented in C
  • grep doesn't stop after matching.

    Unfortunately all the use cases of smartmatch are hard to remember.

    For repeated lookups a prepared hash scales certainly better.

    You're free to check this with benchmarks or search for older discussions.

    I hoped smartmatch could at least handle the stringification limitation of hashes, but nope:

    DB<141> $h1={} => {} DB<142> $h1 ~~ [$h1] => "" DB<143> 5 ~~ [5] => 1

    Cheers Rolf

    ( addicted to the Perl Programming Language)

    Update

    ) Brian got deep into benchmarking :) http://stackoverflow.com/questions/3951812/how-fast-is-perls-smart-match-operator-for-searching-scalar-in-an-array


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    Re^4: How to check if a variable's value is equal to a member of a list of values
    by McA (Curate) on Mar 25, 2013 at 14:42 UTC

      Thank you. An intersting link. I have to admit that I haven't worked with the smart match operator. It's a little bit too much "Eierlegendenwollmilchsau" (1) for me. And what I read about it confirmed to wait with it. But probably I'm too old fashioned.

      McA

      (1) Best translation I could find on dict.leo.org: jack of all trades device

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