Having fun with instance_exec in Ruby

reshape_hash.rb

class Hash
  def reshape(binding)
    new_hash = self.clone
    new_hash.each{|k, v| new_hash[k] = (binding.instance_exec(&(v))) if v.is_a? Proc}

    return new_hash
  end
end

def foo_method
  10
end

@foo_variable = 20

hash = {
  foo: 'bar',
  method: -> {"I print the value of foo_method method: #{foo_method}"},
  instance_var: -> {"I print the value of foo_variable instance variable: #{@foo_variable}"}
}

reshaped_hash = hash.reshape(self)

puts reshaped_hash[:method]
puts reshaped_hash[:instance_var]

@foo_variable = 50
reshaped_hash = hash.reshape(self)

puts reshaped_hash[:method]
puts reshaped_hash[:instance_var]


#I print the value of foo_method method: 10
#I print the value of foo_variable instance variable: 20
#I print the value of foo_method method: 10
#I print the value of foo_variable instance variable: 50