Add upcase_first method

2 files changed, 14 insertions, 0 deletions

diff --git a/activesupport/lib/active_support/core_ext/string/inflections.rb b/activesupport/lib/active_support/core_ext/string/inflections.rb
index cc71b8155d..f301eeac43 100644
--- a/activesupport/lib/active_support/core_ext/string/inflections.rb
+++ b/activesupport/lib/active_support/core_ext/string/inflections.rb
@@ -222,6 +222,13 @@ class String
     ActiveSupport::Inflector.humanize(self, options)
   end
 
+  # Converts just the first character to uppercase.
+  #
+  #  'what a Lovely Day'.upcase_first # => "What a Lovely Day"
+  def upcase_first
+    ActiveSupport::Inflector.upcase_first(self)
+  end
+
   # Creates a foreign key name from a class name.
   # +separate_class_name_and_id_with_underscore+ sets whether
   # the method should put '_' between the name and 'id'.
diff --git a/activesupport/lib/active_support/inflector/methods.rb b/activesupport/lib/active_support/inflector/methods.rb
index f741c0bfb8..3fbc19ddf8 100644
--- a/activesupport/lib/active_support/inflector/methods.rb
+++ b/activesupport/lib/active_support/inflector/methods.rb
@@ -140,6 +140,13 @@ module ActiveSupport
       result
     end
 
+    # Converts just the first character to uppercase.
+    #
+    #  'what a Lovely Day'.upcase_first # => "What a Lovely Day"
+    def upcase_first(string)
+      string[0].upcase.concat(string[1..-1])
+    end
+
     # Capitalizes all the words and replaces some characters in the string to
     # create a nicer looking title. +titleize+ is meant for creating pretty
     # output. It is not used in the Rails internals.