Dear community, I needed a few functions which were missing in the OCaml library : Bigarray.Genarray , and decided to write them for my own purpose : Iteration on genarrays mapping on genarrays folding on genarrays Today I believe this can be usefull for others, and may suffer a code inspection a…

Maybe you could propose them as additions to the Stdlib.

I personally have wished frequently that mapping across Genarrays was something available in the stdlib. For my case, given an n-dimensional array I would like to map a function on (n-1)-dimensional arrays across it (which we can implement using slice_left). But, one could make it even more general …

I think you have mixed slice_left and sub_left, haven’t you ? sub_left has indeed this constraint of being only n-1 whereas slice_left does not. These two primitives are indeed part of the standard library now (and complex in my understanding, at least in their description). The purpose of the stan…

I would indeed love to, but If I need to clone the ocaml repos and build everything to make sur my change requests does not break anything before submitting, I guess I won’t be able to make it (or it would take a lot of time). Plus looking at some part of their code, it looks like (although I am not…

I did not speak clearly. I agree you can use slice_left to solve both of these problems at once. I meant that I only have encountered the need to map across (n-1)-dimensional arrays, but one could make it even more general using slice_left, and map an operator across a k-dimensional array of (n-k)-d…

[ANN] A small extension of Bigarray.Genarray adding iteration, mapping and folding

Ecosystem

NAlec July 16, 2026, 5:43pm 7

Just to let you know, it is now available as GenArrayIter opam package. PR welcome of course.
Documentation here

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[ANN] A small extension of Bigarray.Genarray adding iteration, mapping and folding

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