method

deep_dup

Ruby on Rails latest stable (v3.2.13) - 0 notes - Class: Hash

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What's this?

deep_dup() public

Returns a deep copy of hash.

hash = { :a => { :b => 'b' } }
dup  = hash.deep_dup
dup[:a][:c] = 'c'

hash[:a][:c] #=> nil
dup[:a][:c]  #=> "c"

Show source

# File activesupport/lib/active_support/core_ext/hash/deep_dup.rb, line 10
  def deep_dup
    duplicate = self.dup
    duplicate.each_pair do |k,v|
      tv = duplicate[k]
      duplicate[k] = tv.is_a?(Hash) && v.is_a?(Hash) ? tv.deep_dup : v
    end
    duplicate
  end

deep_dup

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