Add codewars (6) weird string case

Author: etdev

Diff for: 0_code_wars/6_weird_string_case.rb

@@ -0,0 +1,12 @@
+# http://www.codewars.com/kata/weird-string-case/
+# --- iteration 1 ---
+def weirdcase(string)
+  string.split(" ").map! do |word|
+    word.chars.map.with_index { |char, idx| idx.even? ? char.upcase : char.downcase }.join
+  end.join(" ")
+end
+
+# --- iteration 2 ---
+def weirdcase(string)
+  string.gsub(/\w{1,2}/, &:capitalize)
+end