Array#to_h, Struct#to_h, and Struct#to_json

gistfile1.rb

require 'json'

class Array
  def to_h
    inject({}) { |memo, kv| key, value = *kv; memo[key] = value; memo }
  end
end

class Struct
  def to_h
    each_pair.to_a.to_h
  end
  
  def to_json
    to_h.to_json
  end
end