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Postings from December 2004
Luke Palmer wrote:
> The remaining problem is what to do about unary dot. Repeated here for
> the, er, benefit? of p6l:
>
> class Duple {
> has $.left;
> has $.right;
>
> method perform (&oper) {
> &oper($.left);
> &oper($.right);
> }
> }
>
> Let's change that into a Tuple class:
>
> class Tuple {
> has @.elems;
>
> method perform (&oper) {
> for @.elems {
> .perform($_);
> }
> }
> }
>
> Can you find the mistake?
Well it's not using &oper on the elems anymore.
method perform (&oper) {
for @.elems {
&oper($_);
}
}
But I don't think that was the mistake you were talking about. And I
don't see what it has to do with unary dot either, because you don't
need to use unary dot to implement that method. Unless each member of
@.elems is a Duple, in which case the class isn't one I'd call Tuple.
Sorry, nitpicking level seems to be set to 9 at the moment. What did you
mean?
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