BrowserUk:

When I saw your original version, I did basically the same thing (swap strings to make the shorter one last). The only problem is that it flips the order of the alternating characters--I expect the first argument to provide the first character, the second argument to provide the second, etc.

I tried a couple quick hacks on yours (and kcotts) version to make it work the way I wanted, but when I didn't get it quickly, I punted. My quick hacks caused the strings to truncate when I was munging with substr on the left because it seems that I can't count properly today--I got bit several times by fencepost errors. For example, one of my attempts was to use zipC and change the starting value of $n based on which string was shorter, but had no luck--nor patience.

You can see what I mean if you fix line 25:

$ cat 1133959.pl
#! perl -slw
use strict;
   . . . snip . . .
print zipD( $A, $B ), zipD( $B, $A );
print zipR( $A, $B ), zipR( $B, $A );
   . . . snip . . .
$ perl 1133959.pl
AaBbCcDdEeFGHIJAaBbCcDdEeFGHIJ
AaBbCcDdEeFGHIJaAbBcCdDeEFGHIJ
       Rate   rR   Rr   Dd   dD
rR 327095/s   --  -2% -55% -55%
Rr 334881/s   2%   -- -54% -54%
Dd 720854/s 120% 115%   --  -0%
dD 721504/s 121% 115%   0%   --

[download]

...roboticus

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

In reply to Re^4: Merge 2 strings like a zip [benchmark] by roboticus
in thread Merge 2 strings like a zip by tel2

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