This is a tangent on your conversation, but...
Alex, that graph looks so cool. Did you do it by hand or did you use some
juicy picolisp program that I can get my hands on?

On Wed, Dec 28, 2016 at 5:45 AM, Alexander Burger <a...@software-lab.de>
wrote:

> On Wed, Dec 28, 2016 at 10:26:22AM +0100, Alexander Burger wrote:
> >    (let Today (date)
> >       (collect 'sDate '+Proj (list Today Today) (list NIL T)) )
>
> The 'list' is of course not necessary:
>
>    (collect 'sDate '+Proj (list Today Today) '(NIL T))
>
>
> But probably it is better anyway to scan both index parts in the same
> direction
> (upwards).
>
> Also, if I remember correctly, 'T' cannot be used for "infinite" here, the
> value
> for +UB trees must be a number or NIL (same as 0). So you can just use a
> number
> greater than any possible date, like (date 999999) -> (2738 1 25)
>
>    (collect 'sDate '+Proj (list NIL Today) (list Today 99999))
>
> Sorry, nothing tested ;)
>
> - Alex
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