Hi Doug,
This clamp functionality is already present in math.ranges as
clamp-to-range:
( scratchpad ) 100 -20 0 [a,b] clamp-to-range .
0
( scratchpad ) 100 20 0 [a,b] clamp-to-range .
20
( scratchpad ) 100 120 0 [a,b] clamp-to-range .
100
Not as clean obviously, but more general. Maybe clamp-to-range can be
simplified from:
: clamp-to-range ( n range -- n )
[ range-min max ] [ range-max min ] bi ;
to:
: clamp-to-range ( n range -- n )
[ range-min ] [ range-max ] bi clamp ;
Alex
2009/5/26 Doug Coleman <doug.cole...@gmail.com>
> Hi everyone,
>
> I added a ``clamp'' word to math.order for clamping a value to an
> interval. Writing min/max by hand is error-prone and the pattern
> comes up fairly often.
>
> ( scratchpad ) -20 0 100 clamp .
> 0
> ( scratchpad ) 20 0 100 clamp .
> 20
> ( scratchpad ) 120 0 100 clamp .
> 100
>
> The word 'at-default' has been removed because it was only used in a
> few places, it's just ``?at drop'' and because it had no docs.
>
> Someday soon ``peek'' will be renamed to ``last'' since not all
> sequences should be thought of as stacks and because first/last is
> more congruent than first/peek.
>
> As always, if anyone notices inconsistencies or patterns for which a
> word should exist, let us know.
>
> Happy factoring,
> Doug
>
>
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