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[QUOTE="Tommy Morgan, post: 4615487"]
[Note:  parts of this message were removed to make it a legal post.]

Maybe you could try using a default parameter?
Like so:
def foo(x = @x)
@z = x + @y
end

Example from irb:

irb(main):001:0> @x = 1
=> 1
irb(main):002:0> @y = 2
=> 2
irb(main):003:0> def foo(x = @x)
irb(main):004:1> @z = x + @y
irb(main):005:1> end
=> nil
irb(main):006:0> foo
=> 3
irb(main):007:0> foo(2)
=> 4
irb(main):008:0> @x
=> 1

You could then re-write your bar method as such:

def bar(new_x)
foo(new_x)
@z * 2
end

Also, if you've got really long complicated methods, that's usually a good
sign that you should refactor your code out a bit.

Hope that helps,

--Tommy M.

The reason is because I have big, long algorithms inside these methods
'foo' and 'bar' and I don't want to re-write "@z = @x + @y" when I get
to method 'bar'. I need to evaluate the function inside 'bar' with all
the same variables except for @x. that one variable needs to be
different when I run bar. Maybe I have to do this:
[/QUOTE]
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