[racket] Dynamic scope

On Thu, Jun 23, 2011 at 3:04 PM, Eli Barzilay <eli at barzilay.org> wrote:
>> You probably want something like parameters.
> (What people *probably* want is something like CL, where you can
> declare a specific variable as special -- and then when you use it in
> a `let' or as a function argument, that binding is done dynamically.
> Doable too, probably, but little point IMO.)

can't say i grok this all, but

http://okmij.org/ftp/Computation/dynamic-binding.html#DDBinding

and

http://okmij.org/ftp/Computation/dynamic-binding.html#implicit-parameter-neq-dynvar

are potentially interesting reading.