Hello Folks

My question is the following:

How can I pass a reference to a method as an argument, so after
finishing the execution of the method the argument gets updated with a
new value. ( known as "pass by reference" in other languages ).

example:
....
def changeValue( val, cad )
     temp = 0;
     val = (val * 10) / cad.to_i
     temp = cad.to_i + 3.to_i
     cad = temp.to_s
end
....
....
val = 35;
cad = "7"

puts "val before calling changeValue:= " + val.to_s
puts "cad before calling changeValue:=" + cad

changeValue( val, cad )

puts "val before calling changeValue:= " + val.to_s     #--- I pretend
to print '50'
puts "cad before calling changeValue:=" + cad          #--- I pretend
to print '10'

Regards
Carlos