Concatenate an array HackerRank Solution

Hello Programmers, In this post, you will know how to solve the Concatenate an array HackerRank Solution. This problem is a part of the HackerRank Linux Shell Series.

One more thing to add, don’t directly look for the solutions, first try to solve the problems of Hackerrank by yourself. If you find any difficulty after trying several times, then you can look for solutions.

Concatenate an array HackerRank Solution

Problem

Given a list of countries, each on a new line, your task is to read them into an array. Then, concatenate the array with itself (twice) – so that you have a total of three repetitions of the original array – and then display the entire concatenated array, with a space between each of the countries’ names.

Input Format

A list of country names. The only characters present in the country names will be upper or lower case characters and hyphens.

Output Format

Display the entire concatenated array, with a space between each of them.

Sample Input

Namibia
Nauru
Nepal
Netherlands
NewZealand
Nicaragua
Niger
Nigeria
NorthKorea
Norway

Sample Output

Namibia Nauru Nepal Netherlands NewZealand Nicaragua Niger Nigeria NorthKorea Norway Namibia Nauru Nepal Netherlands NewZealand Nicaragua Niger Nigeria NorthKorea Norway Namibia Nauru Nepal Netherlands NewZealand Nicaragua Niger Nigeria NorthKorea Norway

Explanation

The entire concatenated array has been displayed.

Concatenate an array HackerRank Solutions

#Given a list of countries, each on a new line, your task is to read them into an array. Then, concatenate the array with itself (twice) - so that you have a total of three repetitions of the original array - and then display the entire concatenated array, with a space between each of the countries' names
arr=($(cat))
arr=("${arr[@]}" "${arr[@]}" "${arr[@]}")
echo ${arr[@]}

Note: This problem (Concatenate an array) is generated by HackerRank but the Solution is Provided by BrokenProgrammers. This tutorial is only for Educational and Learning purposes.

Next: ‘Grep’-A HackerRank Solution