There is no recursion in inc2 or app2.
app=: ] , {:
inc2=: 2&+
(2&+) (] , {:) 2 4 6
(2&+) 2 4 6 6
4 6 8 8
For recursion, it needs $: or name refering it own name directly or
indirectly. such as
rev=: ]`({: , rev@}:)@.(0~:#)
rev i.10
9 8 7 6 5 4 3 2 1 0
Пнд, 28 Мар 2011, Adrian May писал(а):
> Hi again,
>
> Now I'd like to remove that printing hack in my program. I knew it was a
> hack and it won't help with the next bit.
>
> In principle, I want to build a list recursively using some function to
> generate each element from the previous one, up to a certain length. I tried
> it with /\ but just got strange results:
>
> (2*[)/\ 2 3 4
> 2 4 4
>
> and had trouble doing it the long way:
>
> inc2 =: 2&+
>
> app =: (] , inc2@{:@])
> app (2 4 6)
> 2 4 6 8
>
> app2 =: (] , [@{:@])
> inc2 app2 (2 4 6)
> 4 6 8 8
>
> I don't understand what's happening here. Please help. Isn't there something
> out of the box for this?
>
> Adrian.
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regards,
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