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Ruby Ruby Booleans Build a Simple Todo List Program Returning Boolean Values: Part 1

kevinthecoder
kevinthecoder
10,791 Points

Unable to complete the empty? method Challenge

Alright, this one has me totally lost. I watched the video three times and checked my work and still can't figure it out? Can anyone help?? Thanks! I have attached my code.

todo_list.rb
class TodoList
  attr_reader :name, :todo_items

  def initialize(name)
    @name = name
    @todo_items = []
  end

  def add_item(name)
    todo_items.push(TodoItem.new(name))
  end

  def empty?(name)
    index = 0
    found = false
    todo_items.each do |todo_item|
      if todo_item.name == name
        found = true
      end
      if found
        break
      else
        index += 1
      end
    end
    if found
      return index
    else
      return false
    end
  end

end

3 Answers

Hi Kevin,

In the TodoList class, fill in the empty? method to return a boolean value. The empty? method should return true if there are no elements in the @todo_items array. The method should return false if there is more than one element in the @todo_items array.

Here's alternative way, Ruby doesn't require to use implicit return, we can look @todo_items = [] under initialize, that's empty array, right?

Best way is to use empty? method, that's what the question asked.

def empty?
  todo_items.empty?   # this method will return true if array is empty
end

It will return true due to . Hope that helps.

kevinthecoder
kevinthecoder
10,791 Points

Ouch, I wasn't even close. The early stuff was easy to learn but this Boolean stuff is almost over my head. My brain is starting to hurt (hahahaha).

Thanks, Salman. I couldn't figure out the next one either and posted a new question to the forum; perhaps you could advise on that one too if you're still online...

Yeah, it is a bit deceiving and confusing easily. Keep practice to get more grasps. For your another question, I fix that solution, you did great job except end missing. :smile:

Ben Wong
Ben Wong
19,426 Points

if todo_items.empty? return true else return false