Strange things happening in my Int class

[Clayton]

okay, I've gotten into class writing, and I'm taking an Int class that I wrote in Turing, and I am trying to convert it over to Ruby (I know it's reinventing the wheel, but I'm doing it just because), and some weird things are going on.

Ruby:

class Int     def initialize(num)         @@val = num     end     def add(*ints)         ints.each do |element|             @@val += element         end     end     def subtract(*ints)         ints.each do |element|             @@val -= element         end     end end my_int = Int.new(6) puts "#{my_int.add(3,4,5)}" puts "#{my_int.subtract(3,4,5)}"

could someone please tell me why the code above would return 345 when the call to my_int.add(3,4,5) is made? It doesn't make sense why this is happening...

[wtd]

Well, one thing...

An @@ prefix indicates a class variable, rather than an instance variable.

Now, with that out of the way...

You can rewrite this:

code:

puts "#{my_int.add(3,4,5)}" puts "#{my_int.subtract(3,4,5)}"

Much more simply as:

code:

puts my_int.add(3, 4, 5) puts my_int.subtract(3, 4, 5)

[[Gandalf]]

Freakman wrote:

could someone please tell me why the code above would return 345 when the call to my_int.add(3,4,5) is made? It doesn't make sense why this is happening...

Sure it makes sense. How would " " + 3 + 4 + 5 look? Since concatenation and addition have the same precedence, it would become " 345".

[wtd]

[Gandalf] wrote:

Freakman wrote:

could someone please tell me why the code above would return 345 when the call to my_int.add(3,4,5) is made? It doesn't make sense why this is happening...

Sure it makes sense. How would " " + 3 + 4 + 5 look? Since concatenation and addition have the same precedence, it would become " 345".

Ruby is strongly typed, so this doesn't work at all.