On Monday, 8 September 2014 14:54:50 UTC+1, Tony Fong wrote:
>
> @snotskie looped me into this discussion in the context of Lint
>
> I have updated Lint.jl (v0.1.1) to give warnings over
> * for-loop when the iterable is just a literal number
> * nested vcat, i.e.[[1,2],[3,4]]. Other array formats are unaffected since
> their ASTs are distinct.
>
> Tony
>
That's a definite help. Would it be worth (or feasible) generalising to
integer variables too? It wouldn't help in the sample function I gave, but
you could catch cases like:
julia> function sumto(n :: Int)
total = 0
for i in n
total = total + i
end
return total
end
I'd be really interested in seeing an example where this behaviour makes
code nicer. If an integer value can be seen as an array of length zero, is
there something special about numeric arrays? Given an array of arbitrary
type T, should a user always expect that values of type T are iterable?
If there's any interest, I'd be interested in writing a PR to change this
behaviour, as an excuse to familiarise myself with Julia's internals.
Wilfred
