Ruby Control Structures – Unless Solution

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

Task

You’ve updated the score of every HackerRank user who participated in a contest. Sometimes, HackerRank admins also participate in a given contest but care is taken to ensure that their submissions do not get any score and their score is not updated.

Like the previous challenge, you are given a method scoring with an array passed as an argument. Each element of the array is of class User.

User has two public methods, is_admin? and update_score. Your task in this challenge is to use the control structure unless and update all elements of the array who are not admins.

Hint

unless user.is_admin?
    user.update_score
end

or

user.update_score unless user.is_admin? 

The above code is a Ruby one liner.

Explanation

unless is the logical equivalent of if not

Solution – Ruby Control Structures – Unless

def scoring(array)
  # update_score of every user in the array unless the user is admin
    array.each do |user|
        user.update_score unless user.is_admin?
    end
end

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