Symbol#[] method presents in Ruby 1.9

Author: lest

actionpack/lib/abstract_controller/rendering.rb

@@ -121,7 +121,7 @@ def view_assigns
       variables  = instance_variables
       variables -= protected_instance_variables
       variables -= DEFAULT_PROTECTED_INSTANCE_VARIABLES
-      variables.each { |name| hash[name.to_s[1, name.length]] = instance_variable_get(name) }
+      variables.each { |name| hash[name[1..-1]] = instance_variable_get(name) }
       hash
     end
 

activesupport/lib/active_support/core_ext/object/instance_variables.rb

@@ -10,7 +10,7 @@ class Object
   #
   #   C.new(0, 1).instance_values # => {"x" => 0, "y" => 1}
   def instance_values #:nodoc:
-    Hash[instance_variables.map { |name| [name.to_s[1..-1], instance_variable_get(name)] }]
+    Hash[instance_variables.map { |name| [name[1..-1], instance_variable_get(name)] }]
   end
 
   # Returns an array of instance variable names including "@". They are strings

activesupport/lib/active_support/string_inquirer.rb

@@ -11,8 +11,8 @@ module ActiveSupport
   #
   class StringInquirer < String
     def method_missing(method_name, *arguments)
-      if method_name.to_s[-1,1] == "?"
-        self == method_name.to_s[0..-2]
+      if method_name[-1, 1] == "?"
+        self == method_name[0..-2]
       else
         super
       end