w1d3 Revisions

Question 0

What does the following code do:

begin
  Code.parse('str')
rescue
  puts "Error parsing code!"
  retry
end

Answer 0

It sets up a condition to catch an exception raised by Code.parse, and tries again.

Question 1

Within a class, what does the following code do:

def
pegs[i]
end

Answer 1

Creates a special kid of instance method where #[num] will retrieve the value of pegs[i]

Effectively, it creates the following shorthand:

instance_name[i]

Which stands in for:

instance_name.pegs[i]

Question 2

Explain the following code:

Mastermind::Game.new.play

Answer 2

Retrieves the Game class from the Mastermind module, then runs the new method, and then the play method on the object which new returns

Question 3

T/F: begin-rescue-retry-end can be used to respond to a specific type of error.

Answer 3

T; the specific error is passed to ‘rescue’