Another Basic Ruby Question

Ruby
1

Within the Class I define things which I would expect to be Global.
Both the matrix and the reference to class are not seen in the method
calculate, as they fall outside of the method declaration. How do I
make them visible, so they can remain where they are( Yes, I could pass
the matrix variable - e.g., calculate(m)- but is there another way to do
this?) I don’t think I could pass subr in this manner.

Class Subroutines

#some subroutines listed here
def altitude(abs_psr_inhg)
#stuff
end

end

Class Ballistics

require ‘Matrix’

m = Matrix[[1,2,3],[4,5,6]]
subr = Subroutines.new

def calculate

  puts m
  alt = subr.altitude(abs_psr_inhg)

end

end

2

On Wed, Jan 26, 2011 at 12:36 AM, Jim C. [email protected]
wrote:

def altitude(abs_psr_inhg)
m = Matrix[[1,2,3],[4,5,6]]
end
You could use instance variables. By the way, class is lowecase:

class Subroutines
def altitude(abs_psr_inhg)
puts “altitude”
end
end

class Ballistics
require ‘Matrix’
def initialize
@m = Matrix[[1,2,3],[4,5,6]]
@subr = Subroutines.new
end

def calculate
puts @m
alt = @subr.altitude(@m)
end
end

b = Ballistics.new
b.calculate

Jesus.