Depending on why you're using thunks, you could replace them with promises:
(map force (list (delay 1) (delay 2) (delay 3))) => '(1 2 3) Justin On Thu, Sep 23, 2010 at 8:35 AM, Tim Brown <[email protected]> wrote: > Folks, > > Am I missing something really basic here? > > I have a list of thunks. I want to iterate over the results of these > using a high-order function ... map, for-each, filter (et al). > > The only way I can find to do it is: > > (map (lambda (x) (x)) > (list > (lambda () 1) > (lambda () 2) > (lambda () 3))) -> '(1 2 3) > > Is there a standard name for the (lambda (x) (x)) in racket? > > Or do I have to write my own (define (call x) (x))? > > Tim > > -- > Tim Brown <[email protected]> | City Computing Limited | > T: +44 20 8770 2110 | City House, Sutton Park Road | > F: +44 20 8770 2130 | Sutton, Surrey, SM1 2AE, GB | > -----------------------------------------------------------------------| > BEAUTY: What's in your eye when you have a bee in your hand | > -----------------------------------------------------------------------' > City Computing Limited registered in London No. 1767817. > Registered Office: City House, Sutton Park Road, Sutton, Surrey, SM1 2AE > VAT number 372 8290 34. > _________________________________________________ > For list-related administrative tasks: > http://lists.racket-lang.org/listinfo/users > _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/users
