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README.md

Week 2 - Ruby

To make you familar with ruby syntax, we have created some exercises to help you learn and practice Ruby syntax - covering conditional statements (if, else, elsif), different ways of iteration (each, map) and some object oriented code.

If you not familiar with programming concepts like variable, function and class, you can refer to the following resources

Pre-requisites

Follow this guide to setup your workspace

  • Make sure you are in the correct directory(week_2) while running commands
cd week_2
ls #pet.rb   pet_test.rb ....
rvm gemset create week_2
rvm use 3.0.5@week_2
ruby <file_name>

Submission

  • Use the week2_<your_name> branch for your work
git checkout -b week2_<your_name>
  • Your Pull Request will be graded by the automated tests.
  • Once you have completed the assignment, submit a Pull Request with your work to the branch week2_assignment (not main).

Prime number

This is a simple assignment to familiarize ourself with ruby. In this assignment we will learn about loops in ruby and a bit of error handling.

A prime number is a whole number greater than 1 that cannot be exactly divided by any whole number other than itself and 1 (e.g. 2, 3, 5, 7, 11).

The function below takes a keyword argument n and returns an array of prime numbers less than or equal to n.

For example, prime_numbers(n: 20) should return the following: [2, 3, 5, 7, 11, 13, 17, 19]

If the user gives a invalid input like -4. We will raise an ArgumentError exception to let the caller know that their function arguments were incorrect.

Note - Do not use use the inbuilt prime library

Implement the function prime_numbers in the file prime_numbers.rb and test your code with ruby prime_test.rb.

Pet Store

You are working at a pet store and want to build a system to let the pet owners know the maintenance cost of their pets.

The pet is represented using the Pet class. A Pet stores the following information:

  • Name of the pet (name)
  • Type of animal(Mammals, Fish ...)(animal_type_id)
  • Food consumed by the pet per day in Kg(food_consumed_per_day)

Implement the class Pet above in the file pet.rb and test your code with ruby pet_test.rb.

Interactive Console

You can use the interactive ruby (irb) to help understand and debug your code. irb is similar to python's interactive console and lets you run any ruby code.

For example, to debug prime_numbers.rb do the following:

  • Open a ruby console using irb.
  • Include the ruby program using require_relative 'prime_numbers'.
  • Execute the function (or any valid ruby statement using the interpreter).

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