Okay... So how do I realize: a = vec3(...) [ a a a ; a a a] Well, all I think is, that arrays of arrays get treated like second class citizens, as it is harder to work with them in the same way, as it would be possible with concatenating ;) This is especially relevant with FixedSizeArrays coming up, as they allow for tightly packed array of arrays. What I mean becomes obvious, if you look at the number of constructors: [a,b,c] for non concatenating vs [a;b;c;], [a b c], [a b c; a b c] (+ some variations) for concatenation
2015-02-25 23:24 GMT+01:00 Jeff Bezanson <[email protected]>: > Transposing [vec1, vec2, vec3] will absolutely work. I think the issue > you saw with it was specific to ImmutableArrays. I don't know why they > have that behavior. > > On Wed, Feb 25, 2015 at 5:21 PM, Simon Danisch <[email protected]> wrote: > > I mean, my whole busyness is about constructing matrices of Vec2/3/4, > which > > inherit from DenseArray. > > So I'm basically forced, if I'm not missing something, to do quite a bit > of > > work to get my [vec1 vec2 vec3] going. > > Especially, as transpose([vec1, vec2, vec3]) doesn't seem to work, bug or > > not isn't known to me. > > > > 2015-02-25 23:18 GMT+01:00 Simon Danisch <[email protected]>: > >> > >> Well, the issue raised here was, how do you realize non concatening [a b > >> c]? This seems impossible now, even though that there are quite a few > use > >> cases for it... > >> > >> 2015-02-25 23:13 GMT+01:00 Stefan Karpinski <[email protected]>: > >>> > >>> I actually think the plan of [a,b,c] for construction without > >>> concatenation and [a;b;c] and [a b c] for concatenation is pretty > good. I no > >>> longer feel that there's any need for a new bracket like [| |]. The > thing > >>> that clicked for me is that [a;] isn't really concatenation at all > anyway. > >>> > >>> On Wed, Feb 25, 2015 at 4:58 PM, Simon Danisch <[email protected]> > >>> wrote: > >>>> > >>>> As Julia was the first language to introduce me to this kind of > >>>> constructs, I'm not sure about your used terms. > >>>> Concatenate for me would firstly mean, to just connect elements > (that's > >>>> at least what the German translation suggests), which I would apply > to the > >>>> process of putting the elements together into one array. The elements > in my > >>>> case are the Vectors. > >>>> You seem to use it as synonymous with concatenation + flattening > >>>> (sticking to the function names I guess). > >>>> I'd say [a,b] is supposed to concatenate, but shouldn't flatten, > right? > >>>> So yes, different syntax for concatenating, and > concatenating+flattening > >>>> would make this case much, much clearer. > >>>> Then it's not this fuzzy magic thing, that sometimes happens and > >>>> sometimes not and both clearly encapsulates a concept and use the > same basic > >>>> syntax. > >>>> So: > >>>> [vec, vec] => [vec, vec] # With optional typing, ensuring that you > don't > >>>> end up with Any[] > >>>> [vec vec] => [vec vec] # With optional typing, ensuring that you > don't > >>>> end up with Any[] > >>>> > >>>> [| vec, vec |] => [el1, el2, el3, el4, ...]# With optional typing, > >>>> ensuring that you don't end up with Any[] > >>>> [| vec vec |] => [el el2 ; el3 el4]# With optional typing, ensuring > >>>> that you don't end up with Any[] > >>>> > >>>> I do think, that this is very clear and consistent and doesn't leave > >>>> anything in doubt! > >>>> > >>>> > >>>> Am Mittwoch, 25. Februar 2015 19:00:01 UTC+1 schrieb Simon Danisch: > >>>>> > >>>>> Hi there, > >>>>> I thought default concatenation was deprecated, to make it easier to > >>>>> create arrays of arrays... But it became rather impossible and > confusing in > >>>>> the horizontal case, from what I see. > >>>>> Is there really not a single method left from the few ways in 0.35 of > >>>>> creating a horizontal vector of vectors? > >>>>> 0.4: > >>>>> > >>>>> > https://gist.github.com/SimonDanisch/6972c1c090c608738e83#file-cat0-4-jl > >>>>> 0.3.5: > >>>>> > >>>>> > https://gist.github.com/SimonDanisch/058ef76b2583c620b667#file-cat3-5-jl > >>>>> > >>>>> Am I missing something, or is this a bug?! > >>>>> > >>>>> Best, > >>>>> Simon > >>> > >>> > >> > > >
