Re: [Ocaml-lib-devel] Hashtbl.length and Hashtbl.size

[Nicolas C. <war...@fr...>]

> Hi,
>
> I am sometimes missing a function that returns the size of a hash table:
> 1. length of the underlying array
> 2. number of elements.
>
> let length tbl = Array.length tbl.data
> let size tbl = tbl.size
>
> The purpose of the length function is to return a good guess for the size
> of a table that we want to fill with more or less the same number of
> elements than an existing table.
>
> Did I miss anything?

They are actually useful, and I think we could add them to the ExtHashtbl
module.
However, I'm not sure about the naming : one could mistake size and length.

I propose the following :

"count" for the number of inserted elements (wrt Enum)
"allocated_size" (or something else) for the size of the underlying array.

Regards,
Nicolas Cannasse