Data commit

Task/Soundex/Ruby/soundex.rb

@@ -0,0 +1,28 @@
+class String
+
+  SoundexChars = 'BFPVCGJKQSXZDTLMNR'
+  SoundexNums  = '111122222222334556'
+  SoundexCharsEx = '^' + SoundexChars
+  SoundexCharsDel = '^A-Z'
+
+  # desc: http://en.wikipedia.org/wiki/Soundex
+  def soundex(census = true)
+    str = self.upcase.delete(SoundexCharsDel)
+    str[0,1] + str[1..-1].delete(SoundexCharsEx).
+                          tr_s(SoundexChars, SoundexNums)\
+                          [0 .. (census ? 2 : -1)].
+                          ljust(3, '0') rescue ''
+  end
+
+  def sounds_like(other)
+    self.soundex == other.soundex
+  end
+end
+
+%w(Soundex Sownteks Example Ekzampul foo bar).each_slice(2) do |word1, word2|
+  [word1, word2].each {|word| puts '%-8s -> %s' % [word, word.soundex]}
+
+  print "'#{word1}' "
+  print word1.sounds_like(word2) ? "sounds" : "does not sound"
+  print " like '#{word2}'\n"
+end