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

Caleb Kleveter
MOD
Caleb Kleveter
Treehouse Moderator 37,862 Points
Posted by Caleb Kleveter
Caleb Kleveter
Treehouse Moderator 37,862 Points

Returning boolean values: part 2.

The instructions for this challenge are as follows: "In the TodoList class, fill in the contains? method so that it returns a boolean value if the todo items array contains an item with the name argument."

With my code I get a bummer message that says try again!

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)
    todo_items.each do |todo_arguments|
      return todo_arguments.try_convert(name)
      end
  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

If I try this code:

 if index = find_index(name)
      return true
    end

I get this message: " Bummer! The contains? method did not return a boolean value."

3 Answers

Salman Akram
Salman Akram
Courses Plus Student 40,065 Points

Hi Caleb,

So close I revise your code example, here's alternative way. It is much easier to read and understand easily :wink:

  def contains?(name)
    todo_items.each { |todo_arguments| return true if todo_arguments.name == name }
    false
  end
Stephen Printup
seal-mask
.a{fill-rule:evenodd;}techdegree
Stephen Printup
UX Design Techdegree Student 45,252 Points
Stephen Printup
.a{fill-rule:evenodd;}techdegree
Stephen Printup
UX Design Techdegree Student 45,252 Points

I struggled with the same question and used this:

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

I think it's a bit closer to what the videos were teaching, but whatever works.

Caleb Kleveter
MOD
Caleb Kleveter
Treehouse Moderator 37,862 Points
Caleb Kleveter
Caleb Kleveter
Treehouse Moderator 37,862 Points

Thanks! Did I mis something in a video, because I don't recognize that code.

Minca Daniel Andrei
Minca Daniel Andrei
6,245 Points

The logic is from the find_index method :smile: