Newbie uninitialized constant question

Ruby
1

Hi, I’m pretty new to Ruby and I can’t figure out how to fix the
following error message in the project I just started. I’ve figured out
what I did wrong on the my_list.add line but haven’t been able to fix it
and have spent a decent amount of time on it so any help would be
appreciated. Thanks

error:‘class:List’: uninitialized constant List::Task

code:
class List
attr_reader :all_tasks

if FILE == $PROGRAM_NAME
my_list = List.new
puts “You’ve made a new list”
puts “What task do you want to add?”
user_input = gets.chomp
my_list.add(Task.new (user_input))
puts “You have added #{user_input} to the ToDo list”
end

def initialize
@all_tasks = []
end

def add(task)
all_tasks << task
end
end

class Task
attr_reader :desc

def initialize(desc)
@desc = desc
end
end

2

Brian Booth wrote in post #1183383:

error:‘class:List’: uninitialized constant List::Task

code:
class List
attr_reader :all_tasks

if FILE == $PROGRAM_NAME
…
my_list.add(Task.new (user_input))
…
end
…
end

In the ‘if FILE…’ , you ask class analyser to execute code
immediately, so Task class is unknown a this moment.

A class is a constant, so ‘uninitialized constant’ mean unknown
class…

Move the ‘if FILE…’ code at the end of the script,
and this should work!

3

It worked! Thank you!