HackerRank Ruby Enumerable each_with_index Solution

Hello coders, In this post, you will learn how to solve HackerRank Ruby Enumerable each_with_index Solution. This problem is a part of the Ruby Tutorial series. One more thing to add, don’t straight away look for the solutions, first try to solve the problems by yourself. If you find any difficulty after trying several times, then look for the solutions.

HackerRank Ruby Enumerable each_with_index

Let’s get started with HackerRank Ruby Enumerable each_with_index

Problem Statement

In the previous challenge, we learned about each method being central to all of the methods provided by Enumerable class. One of such useful methods is each_with_index which allows you to iterate over items along with an index keeping count of the item.

For example,

> colors = ['red', 'green', 'blue']
> colors.each_with_index { |item, index| p "#{index}:#{item}" }
"0:red"
"1:green"
"2:blue"

As you can note, the counting of items starts from 0.

In this challenge, your task is to complete the skip_animals method that takes an animals array and a skip integer and returns an array of all elements except first skip number of items as shown in the example below.

For example,

> skip_animals(['leopard', 'bear', 'fox', 'wolf'], 2)
=> ["2:fox", "3:wolf"]

It is guaranteed that number of items in animals array is greater than the value of skip.

HackerRank Ruby Enumerable each_with_index Solution

def skip_animals(animals, skip)
    arr = []
    animals.each_with_index do |item, index| 
            arr << "#{index}:#{item}" unless index < skip
    end
    return arr
end

Note: This problem (Ruby Enumerable each_with_index) is generated by HackerRank but the solution is provided by Chase2Learn. This tutorial is only for Educational and Learning purpose.