Are you reading the desired field name from somewhere?
On Sep 6, 2011, at 2:29 PM, Todd Bittner wrote: > Right, but what I want to do in this case is pass in 'x' and dynamically > construct posn-x rather than pass in the accessor 'posn-x' itself. In other > words, I know I want to call a posn accessor, but I don't know which one yet. > > I want to dynamically build and call the method rather than just dynamically > call the method. > > On Tue, Sep 6, 2011 at 1:22 PM, Matthias Felleisen <matth...@ccs.neu.edu> > wrote: > > In Racket, accessors are functions and are thus perfectly legitimate > arguments: > > (define (foo some-posn some-accessor) > (some-accessor some-posn)) > > > (foo my-posn posn-x) > 3 > > > > > > >
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