Installation

1. Create a fork of this repository.
2. Make sure asdf is installed as well as ruby plugin
3. In root directory of project, install ruby using asdf install
4. Install project dependencies using bundle install

Instructions

1. Write a method named with_these_numbers in the Closures module that will operate on 2 numbers based on a given block. If no block is provided return a list of the numbers

   result = Closures.with_these_numbers(1, 4) do |first, second|
     first + second
   end
   result # Output: 5
   
   result = Closures.with_these_numbers(3, 6) do |first, second|
     first * second
   end
   result # Output: 18
   
   result = Closures.with_these_numbers(12, 3) do |first, second|
     first / second
   end
   result # Output: 4
   
   result = Closures.with_these_numbers(1,2)
   result # Output [1,2]

   Run the specs using rspec spec/closures_spec.rb. Make them pass.

2. Create your own implementation of the .map method in the Closures module. It takes in a list of items and a block then returns a new version of the list modified by what's in the block. If no block is provided return the original list. Do not use Ruby's built-in .map / .collectmethod.

   result = Closures.map([1,2,3]) do |item|
     item * 2
   end
   result # Output: [2,4,6]
   
   result = Closures.map([1,2,3])
   result # Output: [1,2,3]

   Run the specs using rspec spec/closures_spec.rb. Make them pass.

3. Create your own implementation of the .filter method in the Closures module. It takes in a list of items and a block then returns a filtered version of the list. If no block is provided return the original list. Do not use Ruby's built-in .filter / .select method.

   result = Closures.filter([1,2,3]) do |item|
     item.odd?
   end
   result # Output: [1,3]
   
   result = Closures.filter([1,2,3])
   result # Output: [1,2,3]

   Run the specs using rspec spec/closures_spec.rb. Make them pass.

4. Create a Car class that allows this syntax to work

   car = Car.new(color: "Red", manufacturer: "Honda") do |c|
     c.plate_number = "ABC 1234"
     c.manufacturer = "Toyota"
   end
   
   car.color # Red
   car.plate_number # ABC 1234
   car.manufacturer # Toyota

   Run the specs using rspec spec/car_spec.rb. Make them pass.

Challenge

Create a class that uses this syntax

bootcamp = Bootcamp.new do
  topic "Inheritance" do
    description "All about inheritance"
    details do
      lecturer "Ady"
      date "2023-3-28"
    end
  end

  topic "Closures" do
    description "Blocks, Procs and Lambdas"
    details do
      lecturer "Ady"
      date "2023-3-28"
    end
  end
end

This should create a new bootcamp object with the declared items saved as topics with the following fields:

1. title
2. description
3. lecturer
4. date

Tip: instance_eval is a way to add a method to an instance of a class on the spot. It takes in either a string or block and executes that within scope of the instance (e.g. has access to variables and methods)

Run the specs using rspec spec/bootcamp_spec.rb. Make them pass.

Running in console

1. Open irb
2. Import file to use in console e.g. require "./closures.rb".
3. You should be able to use the class in the console.

Submission

Create a Pull Request directed to your fork of this repository then provide a link to the PR to the facilitators.