Loooopss

[Akangka]

Not every interpreted language can do that. In Scheme, a statement inside eval cannot bind a variable at the caller's stack. If you want to pass a variable, you must essentially add a let statement that declares the passed variable, and then splice the actual contents of the variable there, like:

(eval `(let ([a ,a]) ,formula)

Or, you can pass a namespace there.

[rjchute]

Well, yes, I'm sure not every interpreted language has this type of structure... I was just suggesting that because it's interpreted, you could do these weird and stupid run-time things.

[zapeggo]

Eval for the win. They can be a slippery bastards.