Burrows-Wheeler transform

As told by wikipedia the one in the title is a transform useful when compressing data. I spent some minutes on writing these snippets for direct and inverse transformation. May any wise monk help shrinking the code, I'd be thankful and glad to see the results :)

$/="";$l=length($w=<>);map{print+chop}sort+map{substr"$w\0$w",$_,$l+1}
+0..$l

push@w,split//for<>;map{@_=sort@_;$_[$_]=$w[$_].$_[$_]for+0..$#w}0..$#
+w;print+grep{s/\0$//}@_
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Comment on Burrows-Wheeler transform Download Code

Replies are listed 'Best First'.
Re: Burrows-Wheeler transform by moritz (Cardinal) on Jul 01, 2008 at 17:58 UTC
Unless you're trying to golf, you should strive to make it more readable, not shorter.	[reply]
Re^2: Burrows-Wheeler transform by shi (Novice) on Jul 01, 2008 at 18:18 UTC
You're right, but I was actually making also a try at golf. -- `@_=(115,-17,6);print+map{chr$_[$.=$_-$_]$_$.+++$_[$.]$_*$.+++$_[$.]$_**$.}$.-$...$#_`	[reply] [d/l]

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