created train Struct

[timsvoice]

I have a question:
I followed the recipe.rb pattern, but instead of placing an array (am I right in thinking the [ ] signify an array?), I wanted just a single passenger name. But puts "#{value}" output was blank.

This is the code I tried:

train = {}
train[:city] = "Johannesburg"
train[:engines] = 2
train[:cars] = 10
train[:caboose] = true

Passenger = Struct.new(:train, :name)

passenger = Passenger.new( {city: "New York", engines: 2, cars: 10, caboose: true}, "Timothy Voice")

puts "Train"
passenger.train.each do |key, value|
    puts "* #{key}: #{value}"
end

puts "\nPassenger"
passenger.name do |value|
    puts "#{value}"
end

[jwo]

passenger.name do |value|
    puts "#{value}"
end

The actual thing you're doing here is sending a "block" to passenger.name. For a block to be executed, and for the thing inside "do/end" to run, the method passenger.name must "yield" to it.

This is pretty close to what that passenger.name method looks like:

def name
  self.attributes["name"]
end

It would have to do something like this to do a block:

def name
  yield
  self.attributes["name"]
end

So, you could do this:

Passenger = Struct.new(:train, :name) do
  def name
    yield
    super
  end
end

But really, you should just:

puts "\nPassenger"
puts "#{passenger.name}"

[timsvoice]

Excellent. That makes, sense.
Thanks