[racket] Couldn't find a step matching that criterion

On Mon, Jan 10, 2011 at 9:16 AM, Justin Zamora <justin at zamora.com> wrote:

> The stepper works fine on simple programs.  You can try watching this
> video tutorial I made for my students.  It's basic, but it covers the
> essentials of using the stepper.
> http://www.youtube.com/watch?v=j3X07a-7YRM
>
> Justin
>
> On Sun, Jan 9, 2011 at 9:02 AM, Sayth Renshaw <flebber.crue at gmail.com>
> wrote:
> > I am having a real issue with the stepper. Maybe the programs are too
> simple
> > so far for the stepper, but it doesn't step.
> >
> > The check syntax feature is great. for the check-color game should the
> > stepper work? What is the trick? I just wanted to check the flow by
> stepping
> > through.
> > Each time I use it I get "Couldn't find a step matching that criterion"
> > No matter what I change select or do.
> >
> > ;check-color
> > ;colour guessing game (target target)(guess guess)
> > ;symbol symbol symbol symbol -> string
> > ;four color symbols
> > (define (check-color target1 target2 guess1 guess2)
> >   (cond
> >     [(eq? target1 guess1) 'Perfect]
> >     [(or (eq? target1 guess1)(eq? target2 guess2))
> > 'OneColorAtCorrectPosition]
> >     [(or (eq? target1 guess2)(eq? target2 guess1)) 'OneColorOccurs]
> >     [else 'NothingCorrect]))
> >
> > ;(check-color 'red 'green 'green 'red)
> > ;'OneColorOccurs
> >
> > Sayth
> >
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> >
>

Thanks heaps. Very handy
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