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### Re: Sierpinski Triangle

by eyepopslikeamosquito (Chancellor)
 on Aug 17, 2002 at 16:16 UTC ( #190877=note: print w/replies, xml ) Need Help??

Here is an alternative solution. This one is a little shorter and strict and warning safe. Also it does not emit an empty first line. I developed it from ideas in previous solutions posted to fwp@perl.org. See golf thread. If the alien golfers take up my challenge, it will be significantly shortened.

```\$_=\$"x((1|1<<(pop||4))-1)."/\\
";print,s,(?<=\\)..,\$&^"\017|",ge,s,\$,/\\,while+s+^ ++

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Re: Re: Sierpinski Triangle
by eyepopslikeamosquito (Chancellor) on Aug 20, 2002 at 06:24 UTC

Update: The golf dream team of Ton Hospel, Eugene van der Pijll, Mtv Europe and Keith C Ivey whittled 15 strokes from my initial offering:

```#!perl -l

Here are some other solutions (without default argument) they concocted during their fidgeting:

```\$_=\$"x(1<<pop);print,s/(?<=\\)../\$&^"\17|"/egwhile+s^\n?\$^/\\\n^,s\^ \
+\
\$_=\$"x(1<<pop).\$/;print,s/(?<=\\)../\$&^"\17|"/egwhile+s^\$^/\\^,s\^ \\
-lX \$_=\$"x2**pop;print,s/(?<=\\)../\$&^"\17|"/egwhile+s*\$*/\\**s+^ ++
-lX \$_=\$"x2**pop;print,s/(?<=\\)../\$&^"\17|"/egwhile+s-^ (.*)-\$+/\\-
-l \$_=\$"x2**pop;s'\$'/\\',print,s/(?<=\\)../\$&^"\17|"/egwhile+s\^ \\

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