vendor/rails/activesupport/lib/active_support/core_ext/hash/deep_merge.rb

   1 module ActiveSupport #:nodoc:
   2   module CoreExtensions #:nodoc:
   3     module Hash #:nodoc:
   4       # Allows for deep merging
   5       module DeepMerge
   6         # Returns a new hash with +self+ and +other_hash+ merged recursively.
   7         def deep_merge(other_hash)
   8           self.merge(other_hash) do |key, oldval, newval|
   9             oldval = oldval.to_hash if oldval.respond_to?(:to_hash)
  10             newval = newval.to_hash if newval.respond_to?(:to_hash)
  11             oldval.class.to_s == 'Hash' && newval.class.to_s == 'Hash' ? oldval.deep_merge(newval) : newval
  12           end
  13         end
  14
  15         # Returns a new hash with +self+ and +other_hash+ merged recursively.
  16         # Modifies the receiver in place.
  17         def deep_merge!(other_hash)
  18           replace(deep_merge(other_hash))
  19         end
  20       end
  21     end
  22   end
  23 end