Path-like accessing to hash nodes

hash_by_path.rb

TARGET = 4

INPUT = {
  a: {
    b: {
      c: TARGET
    }
  }
}

PATH = 'a.b.c'

module Solution

  VARIANTS = {
    eval:   ->{ eval 'INPUT[:' + keys.join('][:') + ']' },
    reduce: ->{ keys.map(&:to_sym).reduce(INPUT, :[]) }
    # feel free to put another here
  }

  def self.keys
    @@keys ||= PATH.split('.')
  end

  def self.results
    VARIANTS.map do |name, l|
      begin
        { name => l.call }
      rescue StandardError => e
        { name => [e.message, e.backtrace[0]] }
      end
    end
  end

  def self.values
    results.map{|h| h.values[0]}
  end

  def self.check!
    (values - [TARGET]).empty?
  end
end

# true - good, false - bad..
puts Solution.check!

# if need trace
puts Solution.results