Default Arguments and Memoized

tl;dr: Avoid to memoize methods with default (keyword) arguments!

When you are using Memoized with default arguments or default keyword arguments, there are some edge cased you have to
keep in mind.

When you memoize a method with (keyword) arguments that have an expression as default value, you should be aware
that the expression is evaluated only once.

Copymemoize def print_time(time = Time.now)
  time
end

print_time
=> 2021-07-23 14:23:18 +0200

sleep(1.minute)
print_time
=> 2021-07-23 14:23:18 +0200

When you memoize a method with (keyword) arguments that have default values, you should be aware that Memoized
differentiates between calling the method without any arguments and calling the method with the default values.

Copymemoize def true_or_false(default = true)
  puts 'calculate value ...'
  default
end

true_or_false
calculate value ...
=> true

true_or_false
=> true

true_or_false(true)
calculate value ...
=> true