add more helper utilities for the .Mutable modules in Vector

[cartazio]

the .Mutable modules are currently a bit impoverished. could use some more utilities

[cartazio]

and hopefully this could be done for the 0.11 release

[archblob]

If you have anything in mind I can whip up a PR for this.

[cartazio]

I've not thought that far!

I'm thinking it'd be good to provide a bunch of the "functional" flavored operations (albeit with monadic results), plus a bunch of inplace operations.

Eg, map and imap, plus inplace versions thereof.

[cartazio]

basicaly: everything that has a reasonable definition for the .Mutable modules (though they wont fuse), and that we provide in the pure setting, we should provide, plus the inplace versions of applicable operations.

like http://hackage.haskell.org/package/vector-0.10.12.2/docs/Data-Vector-Generic-Mutable.html is pretty impoverished compared with http://hackage.haskell.org/package/vector-0.10.12.2/docs/Data-Vector-Generic.html

[archblob]

Yeah, I see. Also the documentation has some holes. I will have a go.

[cartazio]

you rock! (this is a lot of work mind you, lemme know if you want help!)

[osa1]

Is this for adding utilities like http://hackage.haskell.org/package/vector-0.11.0.0/docs/Data-Vector-Storable.html#g:29 to mutable ones? If so , a big 👍 from me.

[archblob]

Yes it is, but as you can see I'm really lazy so it may take a while.

[cartazio]

@archblob any chance this is still lying in your queue? :) or it is open season?

[archblob]

It seems I still have a branch on my fork. Though now that I'm reminded of this, it's pretty tempting.sigh.
But It's pretty much open season.

[paraseba]

Is this still planned?

Today I needed elemIndex for a mutable vector and I was disappointed when I couldn't find anything similar. In the ideal world, elemIndex could be extremely fast on unboxed mutable vectors, like memchr fast! This would be very useful in low level algorithms.

I might have some cycles, but no working knowledge of the vector package internals. How could I help get this issue moving?

[Shimuuar]

Closed in favor of #334