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Re: Re: (Golf) Nearest Neighbors

by thospel (Hermit)
on Oct 27, 2003 at 19:28 UTC ( #302483=note: print w/replies, xml ) Need Help??


in reply to Re: (Golf) Nearest Neighbors
in thread (Golf) Nearest Neighbors

Just saw this thread. Here is a destructive (only works once) solution at 46:

sub nn{$a|=$"x$_.1for@_;$b.=$"until$a=~/1$b(1)/;@a=@-}

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Re: Re: Re: (Golf) Nearest Neighbors
by thospel (Hermit) on Oct 27, 2003 at 19:34 UTC
    Ah, I should think a bit more before submitting. Here is a 44 (and I should also mention it only works for smallish natural numbers, all different and at least 2 arguments):

    sub nn{$a|=2x$_.3for@_;$b.=2until$a=~/3$b(3)/;@a=@-}

    The need for the assign is a perlbug, otherwise it would be 41

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[1nickt]: kgb not quite as simple as ... and ...; are interchangeable. There are edge cases, shown in perlsyn.
[1nickt]: Hm well actually I guess it's not the trailing semi-colon that's at issue there, it's disambiguation between the ellipsis and the binary flip-flop
[1nickt]: Although the example given does not produce an error as stated, on my perl.
[1nickt]: perl -wE 'say for map { ... } 1..3;' # "Unimplemented at -e line 1" ... <c>perlsyn says that should throw a syntax error...

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