>Deep cloning for Ruby

>A problem with Ruby is that it does not provide deep cloning. What’s more, some classes produce errors when you issue a clone on them, such as Fixnum.

Here is how you can write a simple deep cloning method that will work for hashes and arrays:

  def clone_helper(el)
    el_clone = nil
    if el.kind_of?(Array)
      el_clone = array_clone_helper(el)
    elsif el.kind_of?(Hash)
      el_clone = hash_clone_helper(el)
    else
      begin
        el_clone = el.clone
      rescue TypeError
        el_clone = el
      end
    end
    return el_clone
  end
  
  def array_clone_helper(arr)
    arr.map { |el| clone_helper(el) }
  end
  
  def hash_clone_helper(h)
    h.inject({}) { |h_clone, kv| h[kv[0]] = clone_helper(kv[1]) }
  end

Happy coding..