[EMAIL PROTECTED] wrote:
> ...
> To show some examples:
>
> you cannot create a curried function in Rebol (- even though you can easily
> write it in Rebol), you cannot define a composition function, i.e. this:
>
> o: func [f [function!] g [function!]] [func [x] [f g x]]
>...
The following composition function appears to work, AFAICT...
>> double: func [i] [i + i]
>> double 7
== 14
>> add1: func [i] [i + 1]
>> add1 7
== 8
>> onto: func [:f :g] [func [i] [f g i]]
>> do (onto add1 double) 7
== 15
>> do (onto double add1) 7
== 16
IMHO the problem is NOT that I cannot CREATE the composition function,
but that I cannot STORE it for later use. I can do this:
>> test1: onto add1 double
>> test1 7
== 15
>> test2: onto double add1
>> test2 7
== 16
which appears to be working just as expected, but then the next use
of 'test1 (copied from the next line of my console transcript)
behaves NOT as expected:
>> test1 7
== 16
Hmmmm... Something about 'onto only having a single context (with
only one meaning at a time for 'f and 'g) which is simply referred to
by both 'test1 and 'test2 is my current understanding of what's
happening here.
Any enlightment from the gurus welcomed!
-jn-
