Have you read Guide:Racket 15.1 ? A practical example might help. I think your second example is the same as the first, since eval uses the current namespace if none is provided.
rac On Nov 5, 2010, at 5:53 AM, Jukka Tuominen wrote: > > Hi, > > I'm having trouble of getting namespaces meet when making dynamic > definitions. I made a simple example below. > > ((lambda () > (define x 10) > (eval (list 'define 'y 5)) > (+ x y))) > > ;>> reference to undefined identifier: y > > > > I then tried to "store" one of the namespaces and pass it on to another, but > I guess that's not the way the namespaces work. > > > > ((lambda () > (define namespace (current-namespace)) > (define x 10) > (eval (list 'define 'y 5) namespace) > (+ x y))) > > ;>> reference to undefined identifier: y > > > Any ideas how to solve this? > > br, jukka > > > | J U K K A T U O M I N E N > | m a n a g i n g d i r e c t o r M. A. > | > | Finndesign Kauppiaankatu 13, FI-00160 Helsinki, Finland > | mobile +358 50 5666290 > | [email protected] www.finndesign.fi > > > _________________________________________________ > For list-related administrative tasks: > http://lists.racket-lang.org/listinfo/users _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/users
