so im trying to write a simple timer program in ruby. I defined my methods in a "Timer" class but when I call them it gives me a NoMethodError. Any ideas why? Thanks for the help.
require "Time"
class Timer
def start
$a = Time.now
end
def stop
Time.now - $a
end
end
puts "Type in 'Start'to to start the timer and then type 'Stop' to stop it"
s = gets.start
st = gets.stop
puts st
You're sending start and stop to the return value of gets, which is a String, not a Timer.
Also, you should use instance variables rather than globals to hold the timer value. And you'll also need to create a Timer instance (or turn Timer into a module, but use an instance variable even then, not a global).
@foo is an instance variable, $foo is a global. And don't worry about being new — everyone is at some time or another.start and stop on the string, create a Timer and call the methods on that. Just create it in the method where you want it.Looks like you're not initialising a class object. So either you need to have an initialise method or you can reference the class in the methods.
eg
class Timer
def self.start
$a = Time.now
end
def self.stop
Time.now - $a
end
end
