Ruby Currying – HackerRank Solution

In this post, we will solve Ruby Currying HackerRank Solution. This problem (Currying) is a part of HackerRank Ruby series.

Problem

Currying is a technique in which a function accepts n parameters and turns it into a sequence of n functions, each of them take 1 parameter.

Example :-

multiply_numbers = -> (x,y) do
    x*y
end

doubler = multiply_numbers.curry.(2)
tripler = multiply_numbers.curry.(3)

puts doubler.(4)    #8
puts tripler.(4)    #12

In the above example, lambda take two parameters x, y and return the product of the two.
multiply_numbers.curry.(2) returns a lambda which takes only one parameter necessary for calculation.

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Task

You are given a partially complete code. Your task is to fill in the blanks (_______).
Write a curry, which pre-fills power_function with variable base.

Solution – Ruby Currying – HackerRank Solution

power_function = -> (x, z) {
    (x) ** z
}

base = gets.to_i
raise_to_power = power_function.curry.(base)

power = gets.to_i
puts raise_to_power.(power)

Note: This problem (Ruby Currying) is generated by HackerRank but the solution is provided by CodingBroz. This tutorial is only for Educational and Learning purpose.