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Perl: the Markov chain saw

Re: Fundamental Benchmarks

by grinder (Bishop)
on Apr 02, 2001 at 13:25 UTC ( #68962=note: print w/replies, xml ) Need Help??

in reply to Fundamental Benchmarks

A quick couple of points

  • don't use $a and $b as scratch variables anytime, as they are special... just ask sort. Bad habit to get into... sooner or later you'll get bit.
  • Use $trash = $hash{$_} instead of $trash = $hash{"$_"}. (or $trash = $array["$_"]... whatever floats your boat), but be consistent.
  • use Inline.

g r i n d e r

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[1nickt]: Good morning Monks and Monkettes!
[1nickt]: I have encountered a small code snippet I can not decipher: if ($?) { my $status = $? >> 8; ... }
[1nickt]: Hm, found the doc
[hippo]: >> is the bitwise shift, essentially divides the result by 256.
[haukex]: $? and system - the exit code of a process is stored in the upper bits of $?, so >> 8 does a bit shift to get at it
[hippo]: (truncating)
[erix]: aah, yes haukex++
[hippo]: Re: DBD::Sqlite queries slow - and gives wrong results has 6 upvotes. Is everyone quite well?

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