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Ruby Ruby Booleans Build a Simple Todo List Program Returning Boolean Values: Part 2

hiroshi
hiroshi
13,701 Points
Posted by hiroshi
hiroshi
13,701 Points

Last challenge in Ruby Booleans is not working

This challenge is supposed to have you return true or false for the contains? method if the todo_items array contains an element containing the passed in argument. My solution works in irb, but the challenge tells me that the method does not return a boolean value

def contains?(name)
   todo_items.include?(name)
end

should return true or false but I get the above error. To prove I wasn't crazy, I also tried:

def contains?(name)
    true
end

and it also tells me it does not return a boolean value which is the only thing the method does.

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 contains?(name)
    true
  end

  def find_index(name)
    index = 0
    found = false
        todo_items.each do |item|
      found = true if item.name == name
      break if found
      index += 1
    end
    if found
      return index
    else
      return nil
    end
  end
end

1 Answer

William Li
PLUS
William Li
Courses Plus Student 26,868 Points
William Li
William Li
Courses Plus Student 26,868 Points

Hi, Hiroshi, Because todo_items is just an Array containing TodoItem objects, you need to look at the name attribute of each TodoItem object to find out if todo_items include the one you looking for.

if the todo items array contains an item with the name argument.

That's why this code todo_items.include?(name) doesn't work.

Also, in this code

def contains?(name)
    true
end

it also tells me it does not return a boolean value, well, yeah, here I think the grader can be a bit more helpful. It should probably tells you that the code returns a wrong boolean value.

Here's one way to do it

  def contains?(name)
    todo_items.each do |item|
      return true if item.name==name
    end
    false
  end

Or .

  def contains?(name)
    todo_items.any? {|item| item.name==name}
  end
hiroshi
hiroshi
13,701 Points
hiroshi
hiroshi
13,701 Points

OOOOOOHHHHHHHH facepalm I forgot the array was TodoItems and not just strings. Derp.

I got hooked on the error message which didn't seem to fit alt

Thanks!