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( [id://3333]=superdoc: print w/replies, xml ) Need Help??

While the OP specified that the second string is always the shortest, I wanted one that worked without that restriction:

#! perl -slw use strict; use Benchmark qw[ cmpthese ]; use List::MoreUtils qw[ zip ]; sub zipA { my( $str1, $str2 ) = @_; $str1 =~ s/.\K/ substr $str2, 0, 1, ''/gesr; } sub zipB { no warnings qw/ uninitialized /; my( $a, $b ) = @_; my @a1 = split( '', $a ); my @a2 = split( '', $b ); return join'', zip @a1, @a2; } sub zipC($$){ my( $n, $a, $b ) = ( 1, @_ ); substr( $a, $n, 0, $_), $n += 2 for split '', $b; return $a; };; sub zipR { my ($s1, $s2) = @_; my ($ls1, $ls2, $l, $tmp) = (length($s1), length($s2)); $l = $ls1<$ls2 ? $ls1 : $ls2; $tmp = join("", map{substr($s1,$_,1), substr($s2,$_,1)} 0 .. $l-1) . substr($l==$ls2 ? $s1 : $s2,$l); return $tmp; } sub zipD { my ($str1, $str2) = @_; for (0 .. length $str2) { substr $str1, $_ * 2 + 1, 0, substr $str2, $_, 1; } return $str1; } our $A = 'ABCDEFGHIJ'; our $B = 'abcde'; my (%tests,%results); for my $T (qw(A B C D R)) { $tests{$T.'a'} = "my \$z = zip$T( \$A, \$B )"; $tests{$T.'b'} = "my \$z = zip$T( \$B, \$A )"; my $a = eval($tests{$T.'a'}); my $b = eval($tests{$T.'b'}); } my %R = ( a=>eval $tests{Ba}, b=>eval $tests{Bb} ); print "Expected: a=<$R{a}>, b=<$R{b}>"; for my $test (sort keys %tests) { no warnings 'uninitialized'; my $S = eval $tests{$test}; my $R = $R{substr($test,1,1)}; if ($R ne $S) { print "test $test failed: <$S>"; delete $tests{$test}; } } cmpthese -1, \%tests; __END__ $ perl 1133865.pl Expected: a=<AaBbCcDdEeFGHIJ>, b=<aAbBcCdDeEFGHIJ> test Ab failed: <aAbBcCdDeE> test Cb failed: <> test Db failed: <> Rate Bb Ba Aa Rb Ra Ca Da Bb 105326/s -- 0% -62% -69% -69% -81% -86% Ba 105326/s 0% -- -62% -69% -69% -81% -86% Aa 276648/s 163% 163% -- -18% -19% -50% -62% Rb 336364/s 219% 219% 22% -- -1% -39% -54% Ra 339856/s 223% 223% 23% 1% -- -39% -54% Ca 553781/s 426% 426% 100% 65% 63% -- -25% Da 735965/s 599% 599% 166% 119% 117% 33% --

So I have the fastest one that works without that restriction. (Prediction, someone else will hold that title within 20 minutes......)

...roboticus

When your only tool is a hammer, all problems look like your thumb.


In reply to Re^2: Merge 2 strings like a zip [benchmark] by roboticus
in thread Merge 2 strings like a zip by tel2

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