OK, thanks, obvious...
Search results did not help much either, that was main reason of my post,
perhaps soon they will...
Thanks,
Kaj
On Monday, July 20, 2015 at 10:20:27 PM UTC+3, Patrick O'Leary wrote:
>
> Julia is returning the value of `println("foo..")` from the function
> `foo()`; the value of the block expression is the value of the last
> expression in the block. It's turtles all the way down, so `println()` also
> returns a value in the same way, etc.
>
> The error is because to destructure the return value into `a` and `b`,
> Julia iterates the return value. The return value of `foo`, which is the
> same as the return value from `println`, is something which is not iterable.
>
> I agree that the error message isn't very helpful, but it's also hard to
> say how one would fix that.
>
> On Monday, July 20, 2015 at 2:09:00 PM UTC-5, Kaj Wiik wrote:
>>
>> I started to get a strange error while debugging my code, here's a
>> simplified example:
>>
>> julia> function foo(a)
>> println("foo..")
>> end
>> foo (generic function with 1 method)
>>
>> julia> a = foo(2)
>> foo..
>>
>> julia> a,b = foo(2)
>> foo..
>> ERROR: `start` has no method matching start(::Nothing)
>>
>>
>> So, the problem was a missing return value, it is strange that missing
>> one value did not give error but two values.... It took a quite long time
>> to track this down. Perhaps a bit more informative error message would be
>> possible...?
>>
>> Cheers,
>> Kaj
>>
>>
