BatList.modify_at instead of an array and a.(i) <- x ?

[Naereen]

Hi,
For example, here,

obandit/src/obandit.ml

Line 113 in 18cf133

u = if b.a>=0 then BatList.modify_at b.a (fun ui -> ui +. x) b.u else b.u}

I wonder why you use this BatList module and a modify_at function (which cannot be in O(1) but is in O(n) if the list has n elements), instead of using a simple int array or float array and changing its i-th value with a.(i) <- x.
Thanks, I'm curious 😃.

[freuk]

Hey Lilian, because performance wasn't the concern.
If you have any serious use don't use the current opam release, there is a bugfix pending to be pushed. master is fine.

Ton travail est sympa, tu peux contacter @albietz qui travaille sur des choses similaires je pense, au vu de son dernier article et de ta librairie fraichement publiee.

[Naereen]

Hi,
OK, it makes sense, thanks for the quick reply. I don't plan on using obandit sorry.

Merci du pointeur, j'avais vu passé son dernier article mais sans relever que c'était quelqu'un d'Inria Grenoble 😮 !
Bonne continuation 👍 !