Add String#swapcase,swapcase!,concat,casecmp,start_with,end_with

1 files changed, 14 insertions, 0 deletions

diff --git a/mrbgems/mruby-string-ext/mrblib/string.rb b/mrbgems/mruby-string-ext/mrblib/string.rb
index 142a63882..005438b38 100644
--- a/mrbgems/mruby-string-ext/mrblib/string.rb
+++ b/mrbgems/mruby-string-ext/mrblib/string.rb
@@ -35,4 +35,18 @@ class String
     s = self.strip
     (s == self) ? nil : self.replace(s)
   end
+
+# call-seq:
+#    str.casecmp(other_str)   -> -1, 0, +1 or nil
+#
+# Case-insensitive version of <code>String#<=></code>.
+#
+#    "abcdef".casecmp("abcde")     #=> 1
+#    "aBcDeF".casecmp("abcdef")    #=> 0
+#    "abcdef".casecmp("abcdefg")   #=> -1
+#    "abcdef".casecmp("ABCDEF")    #=> 0
+#
+  def casecmp(str)
+    self.downcase <=> str.downcase
+  end
 end