On Sat, 01 Oct 2016 15:44:18 -0500,
Angus wrote:
>
> And it is now more obvious to me that in:
>
> (define (bigger w)
> (interval (min (interval-big w)
> (add1 (guess w)))
> (interval-big w) (+ (interval-guesses w) 1)))
>
> The (interval... part is a constructor
On Saturday, 1 October 2016 16:13:01 UTC+1, Ben Greenman wrote:
> Maybe this will help:
>
>
>
>
> (struct interval (small big guesses))
>
> creates 5 new functions
> interval, for making intervals. For example (interval 5 10 0) creates an
> interval from 5 to 10 that has 0 guessesinterval?,
Maybe this will help:
(struct interval (small big guesses))
creates 5 new functions
1. interval, for making intervals. For example (interval 5 10 0) creates
an interval from 5 to 10 that has 0 guesses
2. interval?, for testing if a value is an interval. For example
(interval? 1) is
On Sat, 01 Oct 2016 09:47:00 -0500,
Angus wrote:
> I don't understand. How would I pass it an interval?
>
> I am confused about the w parameter in smaller. ie (define (smaller w)
>
> what is w? Is that the current interval held as state within big-bang?
Yes, that is correct.
Have a closer
I guess you're familiar with the dot operator (object.field) in C and
Java? In Racket, we don't provide access to that directly, but instead
put such operations in "selector functions". So when you see
(interval-guesses w)
that's something more like
w.guesses
In other words, you can think
On Saturday, 1 October 2016 15:30:19 UTC+1, Vincent St-Amour wrote:
> On Sat, 01 Oct 2016 09:13:25 -0500,
> Angus wrote:
> > Then I changed smaller (and bigger) like this:
> >
> > (define (smaller w)
> > (interval (interval-small w)
> > (max (interval-small w)
> >
On Saturday, 1 October 2016 15:30:19 UTC+1, Vincent St-Amour wrote:
> On Sat, 01 Oct 2016 09:13:25 -0500,
> Angus wrote:
> > Then I changed smaller (and bigger) like this:
> >
> > (define (smaller w)
> > (interval (interval-small w)
> > (max (interval-small w)
> >
On Sat, 01 Oct 2016 09:13:25 -0500,
Angus wrote:
> Then I changed smaller (and bigger) like this:
>
> (define (smaller w)
> (interval (interval-small w)
> (max (interval-small w)
> (sub1 (guess w)
>
> to
>
> (define (smaller w)
> (interval (interval-small
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