1 files changed, 18 insertions, 1 deletions
diff --git a/actionpack/lib/action_controller/metal/strong_parameters.rb b/actionpack/lib/action_controller/metal/strong_parameters.rb
index 6a07a73d94..4c9eb20c65 100644
--- a/actionpack/lib/action_controller/metal/strong_parameters.rb
+++ b/actionpack/lib/action_controller/metal/strong_parameters.rb
@@ -225,7 +225,7 @@ module ActionController
 
     class << self
       def nested_attribute?(key, value) # :nodoc:
-        key =~ /\A-?\d+\z/ && (value.is_a?(Hash) || value.is_a?(Parameters))
+        /\A-?\d+\z/.match?(key) && (value.is_a?(Hash) || value.is_a?(Parameters))
       end
     end
 
@@ -259,6 +259,11 @@ module ActionController
         @parameters == other
       end
     end
+    alias eql? ==
+
+    def hash
+      [@parameters.hash, @permitted].hash
+    end
 
     # Returns a safe <tt>ActiveSupport::HashWithIndifferentAccess</tt>
     # representation of the parameters with all unpermitted keys removed.
@@ -744,6 +749,18 @@ module ActionController
     end
     alias_method :delete_if, :reject!
 
+    # Returns a new instance of <tt>ActionController::Parameters</tt> without the blank values.
+    # Uses Object#blank? for determining if a value is blank.
+    def compact_blank
+      reject { |_k, v| v.blank? }
+    end
+
+    # Removes all blank values in place and returns self.
+    # Uses Object#blank? for determining if a value is blank.
+    def compact_blank!
+      reject! { |_k, v| v.blank? }
+    end
+
     # Returns values that were assigned to the given +keys+. Note that all the
     # +Hash+ objects will be converted to <tt>ActionController::Parameters</tt>.
     def values_at(*keys)