Turn "fööbär" into "foobar", not "f-o-ob-ar". As a desired side-effect, "foo!!1" becomes "foo1" rather than "foo-1".

This is under OS X, by the way. I believe iconv can behave slightly differently on different platforms.

Author: henrik

lib/permalink_fu.rb

@@ -12,10 +12,10 @@ class << self
 
     def escape(str)
       s = ((translation_to && translation_from) ? Iconv.iconv(translation_to, translation_from, str) : str).to_s
-      s.gsub!(/\W+/, ' ') # all non-word chars to spaces
+      s.gsub!(/[^\w -]+/, '') # strip unwanted characters
       s.strip!            # ohh la la
       s.downcase!         #
-      s.gsub!(/\ +/, '-') # spaces to dashes, preferred separator char everywhere
+      s.gsub!(/[ -]+/, '-') # separate by single dashes
       s
     end
   end

test/permalink_fu_test.rb

@@ -132,10 +132,11 @@ class MockModelExtra < BaseModel
 
 class PermalinkFuTest < Test::Unit::TestCase
   @@samples = {
-    'This IS a Tripped out title!!.!1  (well/ not really)' => 'this-is-a-tripped-out-title-1-well-not-really',
+    'This IS a Tripped out title!!.!1  (well/ not really)' => 'this-is-a-tripped-out-title1-well-not-really',
     '////// meph1sto r0x ! \\\\\\' => 'meph1sto-r0x',
     'āčēģīķļņū' => 'acegiklnu',
-    '中文測試 chinese text' => 'chinese-text'
+    '中文測試 chinese text' => 'chinese-text',
+    'fööbär' => 'foobar'
   }
 
   @@extra = { 'some-)()()-ExtRa!/// .data==?>    to \/\/test' => 'some-extra-data-to-test' }