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

What is wrong with my answer?

I dont understand why this is wrong.

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?
    if(@todo_items.length == 0)
      return true
    else
      return false
  end

end

3 Answers

Maciej Czuchnowski
Maciej Czuchnowski
36,440 Points

You're missing one end after the return false line.

thanks I don't know why I didn't notice that.

William Li
PLUS
William Li
Courses Plus Student 26,867 Points

though not related, I'd like point out that you can shorten your empty? method like this:

def empty?
  @todo_items.length==0
end

And it behaves exactly the same.

"The method should return false if there is more than one element in the @todo_items array."

I'm confused on this one. My code included a conditional to return false ONLY if there was MORE THAN ONE item in the array (meaning greater than 1)

def empty?
    if @todo_items.empty?
     return true
   end 
    if @todo_items.length > 1
     return false
    end 
  end

but the code that passes is

def empty? @todo_items.empty? end

should the question say "at least one element"? I don't see this asked elsewhere - what am I misunderstanding? Thanks everyone!

William Li
William Li
Courses Plus Student 26,867 Points

should the question say "at least one element"? I don't see this asked elsewhere - what am I misunderstanding?

No, you are not misunderstanding, and I agree that "at least one element" is a much better description for what this challenge is asking for.