mauricio-mds / custom_enumerable_project

Enumerable Ruby exercises from The Odin Project

Custom Enumerable Project

This repository complements the Custom Enumerables Project in the Ruby Course for The Odin Project. The goal of this project is to reimplement common methods used frequently through the enumerables module with objects like arrays and hashes. This project will also familiarize you with how to work with blocks and procs. Some starter code and specs are provided to validate the correctness of your solutions.

Installation

First, clone this repository with

git clone [email protected]:TheOdinProject/custom_enumerable_project.git

Then, navigate into the folder through your command line with

cd custom_enumerable_project

and install the dependencies using the command

bundle install

Getting Started

You will add new methods to the Enumerable module in lib/my_enumerables.rb. Before you implement a method, go to the corresponding spec file and watch the test fail by running

bundle exec rspec <spec_file>

You can find the associated spec file in the methods section. Then, add the method to the enumerable module. Run the tests again using the same command until they pass.

Example

As an example, before you start implementing the my_each method, run

bundle exec rspec spec/my_each_spec.rb

to see that the test fails as expected.

Once you implement it, like so:

# lib/my_enumerables.rb

class Array
  def my_each
    # Complete code
  end
end

run the command

bundle exec rspec spec/my_each_spec.rb

again to see if your code is correct or not.

Methods

The following table has the methods you will need to implement along with their associated specs, as outlined in the project instructions. The methods in the Enumerable module only need to work with Arrays, but you can challenge yourself and try to make them work for Hashes as well.

Method	Spec File	Notes
Array#my_each	spec/my_each_spec.rb	You will define my_each on the Array class in lib/my_enumerables.rb
Enumerable#my_each_with_index	spec/my_each_with_index_spec.rb
Enumerable#my_select	spec/my_select_spec.rb
Enumerable#my_all?	spec/my_all_spec.rb
Enumerable#my_any?	spec/my_any_spec.rb
Enumerable#my_none?	spec/my_none_spec.rb
Enumerable#my_count	spec/my_count_spec.rb
Enumerable#my_map	spec/my_map_spec.rb
Enumerable#my_inject	spec/my_inject_spec.rb