On Jun 21, 2012, at 1:34 AM, Robby Findler wrote:
> I usually in-naturals and zero? to do this.
Ah! That's nice. I can use that.
>
> I see that one example (that I didn't write is in base-render.rkt
>
>(define/public (render-nested-flow i part ri starting-item?)
> (for/list ([b (in-l
On Jun 21, 2012, at 1:24 AM, Eli Barzilay wrote:
> An hour and a half ago, John Clements wrote:
>
>
>> Yes, of course I can do it the ugly way:
>> [...]
>> (define p1 (mcons #f 'bogus))
>> (set-mcdr! p1 p1)
>> (define true-then-falses (mcons #t p1))
>
> What about
>
> (shared ([fs (cons #f f
A few minutes ago, Robby Findler wrote:
> I usually in-naturals and zero? to do this.
(Ah, I forgot to include this, with the observation that worrying
about bignums is not relevant...)
> I see that one example (that I didn't write is in base-render.rkt
>
> (define/public (render-nested-flo
I usually in-naturals and zero? to do this.
I see that one example (that I didn't write is in base-render.rkt
(define/public (render-nested-flow i part ri starting-item?)
(for/list ([b (in-list (nested-flow-blocks i))]
[pos (in-naturals)])
(render-block b part r
An hour and a half ago, John Clements wrote:
> Reality check before I do something dumb and re-invent the wheel:
>
> I often want to write a for loop where the first element is treated
> specially. In such cases, it would be nice to have a sequence that
> had a #t and then an infinite number of #f
Reality check before I do something dumb and re-invent the wheel:
I often want to write a for loop where the first element is treated specially.
In such cases, it would be nice to have a sequence that had a #t and then an
infinite number of #f's, so I could write
(for ([s my-sequence] [first? ]
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