How to consistently use word lengths in a string as an exponent?

Question

ruby

There is a string, you need to get the length of each word and raise them to a power one by one in reverse order.
For example: "Masha pila sok" => 5, 4, 3 => ( 3 ^ 4 ) ^ 5 => 3486784401.

Answer 1

str.split(' ').map{|w| w.length}.reverse.reduce{|b, p| b ** p}