Class: Hash

Inherits:
Object
  • Object
show all
Defined in:
lib/activerecord_clone.rb

Instance Method Summary collapse

Instance Method Details

#deep_merge(hash) ⇒ Object

Merges self with another hash, recursively.

This code was lovingly stolen from some random gem: gemjack.com/gems/tartan-0.1.1/classes/Hash.html

Thanks to whoever made it.



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# File 'lib/activerecord_clone.rb', line 10

def deep_merge(hash)
  target = dup
  
  hash.keys.each do |key|
    if hash[key].is_a? Hash and self[key].is_a? Hash
      target[key] = target[key].deep_merge(hash[key])
      next
    end
    
    target[key] = hash[key]
  end
  
  target
end

#deep_merge!(second) ⇒ Object

From: www.gemtacular.com/gemdocs/cerberus-0.2.2/doc/classes/Hash.html File lib/cerberus/utils.rb, line 42



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# File 'lib/activerecord_clone.rb', line 29

def deep_merge!(second)
  second.each_pair do |k,v|
    if self[k].is_a?(Hash) and second[k].is_a?(Hash)
      self[k].deep_merge!(second[k])
    else
      self[k] = second[k]
    end
  end
end

#deep_merge2(other) ⇒ Object

cf. subtech.g.hatena.ne.jp/cho45/20061122



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# File 'lib/activerecord_clone.rb', line 43

def deep_merge2(other)
   deep_proc = Proc.new { |k, s, o|
      if s.kind_of?(Hash) && o.kind_of?(Hash)
         next s.merge(o, &deep_proc)
      end
      next o
   }
   merge(other, &deep_proc)
end

#deep_merge3(second) ⇒ Object 



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# File 'lib/activerecord_clone.rb', line 54

def deep_merge3(second)

   # From: http://www.ruby-forum.com/topic/142809
   # Author: Stefan Rusterholz

   merger = proc { |key,v1,v2| Hash === v1 && Hash === v2 ? v1.merge(v2, &merger) : v2 }
   self.merge(second, &merger)

end

#keep_merge(hash) ⇒ Object 



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# File 'lib/activerecord_clone.rb', line 65

def keep_merge(hash)
   target = dup
   hash.keys.each do |key|
      if hash[key].is_a? Hash and self[key].is_a? Hash
         target[key] = target[key].keep_merge(hash[key])
         next
      end
      #target[key] = hash[key]
      target.update(hash) { |key, *values| values.flatten.uniq }
   end
   target
end