I want to build a nested hash more easily.

nested_hash_buildable.rb

# frozen_string_literal: true

module NestedHashBuildable
  # Builds a nested hash
  #
  # NestedHashBuildable.build(:a, :b, c: obj)
  # #=> { a: { b: { c: obj } } }
  def self.build(*keys, obj)
    keys.reverse.inject(obj) { |a, i| { i => a } }
  end

  def nested_hash(*keys, obj)
    NestedHashBuildable.build(*keys, obj)
  end
end