Merge pull request #2089 from ksss/sym-casecmp

Implement Symbol#casecmp

1 files changed, 11 insertions, 0 deletions

diff --git a/mrbgems/mruby-symbol-ext/mrblib/symbol.rb b/mrbgems/mruby-symbol-ext/mrblib/symbol.rb
index 51a8ddc84..f4bf23cb1 100644
--- a/mrbgems/mruby-symbol-ext/mrblib/symbol.rb
+++ b/mrbgems/mruby-symbol-ext/mrblib/symbol.rb
@@ -48,6 +48,17 @@ class Symbol
     self.to_s.upcase.intern
   end
 
+  ##
+  # call-seq:
+  #   sym.casecmp(other)  -> -1, 0, +1 or nil
+  #
+  # Case-insensitive version of <code>Symbol#<=></code>.
+
+  def casecmp(other)
+    return nil unless other.kind_of?(Symbol)
+    self.to_s.upcase <=> other.to_s.upcase
+  end
+
   #
   # call-seq:
   #   sym.empty?   -> true or false