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On Thu, Nov 8, 2012 at 12:53 PM, David Given <> wrote:
> It's much easier to think of this as *all* values being passed by
> reference... it's just that numbers, like strings, are immutable and
> cannot be changed. Therefore:
> a = a + 1
> ...does not *change* the value of the thing a points at. Instead it
> creates a new number with the value (a+1) and then reassigns a to point
> at the new number instead of the old one.

What about:

function f (a)
  a = a + 1

function g ()
  a = 1
  -- what is a?

- Patrick Donnelly