Ruby Workshop

The purpose of these exercises is to train you on how to use classes, operator overloading and linked list in ruby.

Exercises

1. DPokemon

A DPokemon is a pokemon profile that shows the name and the power level of a particular pokemon. In some cases, this pokemon meets other pokemons, and it wants to compare levels and know which is the strongest.

Your task here is to implement a DPokemon class and provide the necessary methods to compare the pokemon levels.

• Implement main class

lugia = DPokemon.new("lugia", 2000)
pikachu = DPokemon.new("pikachu", 2000)

• Implement equal method(==)

lugia == pikachu # false

• Implement stronger method(>)

lugia > pikachu # true

• Implement less strong method(<)

lugia < pikachu # false

2. FixedArray

A FixedArray is an array that always has a fixed number of elements.

Your task here is write a class that implements a fixed-length array, and provides the necessary methods to support the following code:

• Implement main class

fixed_array = FixedArray.new(5)

• Setting a element to position

fixed_array[3] = 12
puts fixed_array # nil, nil, nil, 12, nil

• Retrieve an element

fixed_array[3] # 12

• Support errors

fixed_array[6] # raise an IndexError

• Convert to array

puts fixed_array.to_a # [nil, nil, nil, 12, nil]

• Convert to string

puts fixed_array.to_s # '[nil, "c", nil, "a", "d"]'

3. SuperFibo

Have you heard of Leonardo Pisano? Not yet? Don't worry, He invented a famous succession

0 1 1 2 3 5 8 13

Maybe now you have an idea, this is the fibonacci sequence.

Your task here will be to implement a fibonacci sequence with objects:

Example of code:

zero = SuperFibo.new
one = zero.next
puts one.value # 1

another_one = one.next
puts another_one.value # 1

puts another_one.next.value # 2
puts another_one.next.next.value # 3

Running the tests

After you finish an exercise, you need to go that exercise test in the test folder and remove the comment operator, like this:

- class FixedArrayTest # < Minitest::Test
+ class FixedArrayTest < Minitest::Test

Then you can run the tests with this command:

rake test