Golf:55 (and no sort!) 

perl -ple"local($\",@_);@_[unpack'C*',$_]=split'';$_=qq[@_]" test-stri
+ngs
+/034589BDFHKMNUXabcfghjlnqstuwxyz
/1234589ACEGIKLMNPQRSTbdefhjklnopqstux
/013589ABCIMNRTVYbcdefghjkloqtuwxy
/03589BEFKLMNOPQTabcfghlmqrtuvwx
+/1345689ACGKMNOQWbdghlmnoqrtuwx
/234589ABDEFGHIMNORTabdfhilnqtuwxyz
+/01345789ACEIMNPQTZabcefghlmqtuwx
/234589ACGILMNOQUbehlmoqrstuwxyz

[download]

Unix version is one less:perl -ple'local($",@_);@_[unpack"C*",$_]=split"";$_=qq[@_]'

Two less(thanks ikegami):perl -ple'local($",@_);@_[unpack"C*",$_]=split"";$_="@_"'

Update:54: perl -ple"local(@_);@_[unpack'C*',$_]=split'';$_=join'',@_" test-strings

50: -ple"@_=();@_[unpack'C*',$_]=split'';$_=join'',@_"

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.
"Too many [] have been sedated by an oppressive environment of political correctness and risk aversion."

In reply to Re: Collapsing a string to unique characters by BrowserUk
in thread Collapsing a string to unique characters by dwhite20899

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