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Re: TMTOWTDI Puzzle: Generating a range of numbers

by wog (Curate)
on Dec 19, 2001 at 04:38 UTC ( #132987=note: print w/replies, xml ) Need Help??

in reply to TMTOWTDI Puzzle: Generating a range of numbers

(update: the first one has been edited to fix problems/bad style since I first pressed submit. Oopsie.)

use strict; my @result; my $one = "a" =~ /./; sub add { my($vA,$vB) = @_; ($vA,$vB) = ($vA^$vB,($vA&$vB)<<$one) while $vB; return $vA; } my $val = $one; do { push @result, $val; $val = add($val,$one); } until $one.$one eq $val;

... or, without any lines preceeding it in the file it's in ...

sub f { die if $::f_A; die if $::f_B; die if $::f_C; die if $::f_D; die if $::f_E; die if $::f_F; die if $::f_G; die if $::f_H; die if $::f_I; die if $::f_J; } my @vars = map { "::f_$_" } qw(A B C D E F G H I J); my @result; foreach (@vars) { $$_ = "true"; eval { f() }; push @result, $@ =~ /line ([^.]+)\./; $$_ = undef; }

update: A very, very cheap solution: (doesn't work on EBCDIC systems, sorry)

my @result = split " ", "pasarauatawavayaxapq"^"AAAAAAAAAAAAAAAAAAAA";

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[Lady_Aleena]: Rigth now I'm ranting in my head about an old subject.
[1nickt]: Hm, that is, how to prevent Perl from turning 1.0 into 1? I feel sure this must be an faq, but am reading perlnum and not finding the answer ...
[Lady_Aleena]: 1nickt, why does it matter in this case?
[1nickt]: Hm, perhaps this? "Operators which expect an integer force the argument into the integer format."
[1nickt]: Can this be? So print
[1nickt]: ... "expects an integer" ?

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