explode_dotted_keys.rb

explode_dotted_keys.rb

require 'ap'

module HashExt

  def explode_keys(key_delimiter: '.')
    recursive_hash = self.class.new { |hash, key| hash[key] = self.class.new(&hash.default_proc) }

    result = self.to_h.reduce(recursive_hash) do |recursive_acc, (input_key_path, input_value)|
      keys = input_key_path.to_s.split(key_delimiter)
      tree = keys.map {|key| [:[], key] }
      tree.push([:[]=, tree.pop[1], input_value])
      tree.reduce(recursive_acc) do |acc, tree_node|
        acc.public_send(tree_node.shift, *tree_node)
      end
      recursive_acc
    end

    result.default = self.class.new.default

    result
  end

  def explode_keys!(key_delimiter: '.') # TODO - Make it working
    puts self.methods.sort
    # self = explode_keys(key_delimiter)
  end

end

class Hash
  
  include HashExt

end

class HashWithIndifferentAccess

  include HashExt

end

ap h = {
  'a.b1.c1' => 'ab1c1',
  'a.b1.c2' => 'ab1c2',
  # 'a' => {'b3' => 'a.b3', 'b4.f1' => 'a.b4.f1'},
  'a.b2.d1.e2' => 'a.b2.d1.e2',
  'a.b4.f2' => 'a.b4.f2',
  'a.b2.d1.e1' => 'a.b2.d1.e1',
}
# n = h.explode_dotted_keys
# 

n = h.explode_keys
ap n
h.explode_keys!
ap h