Getting datasets in a group

[braunsonm]

What are you trying to do?

Getting a list of datasets from a group for looping.

What did you do?

I believe it's possible to use a combination of the functions here:
https://github.com/gonum/hdf5/blob/master/h5g.go#L108

num := f.NumObjects()

Then looping for the range of num and calling ObjectNameByIndex on each.

What did you expect to happen?

A property in the Group struct here: https://github.com/gonum/hdf5/blob/master/h5g.go#L25

An array with each of the dataset names so that they can be looped and opened easily with a f.OpenDataset("myname")

What version of Go, Gonum, Gonum/netlib and libhdf5 are you using?

1.10.2

Does this issue reproduce with the current master?

Yes.

[kortschak]

Please do not edit out parts of the pro forma.

### What did you do?
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### What actually happened?
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It seems that this is more of a question than an issue.

If the issue is a question about usage or similar, please ask at the
Gonum discussion list rather than filing an issue:

https://groups.google.com/forum/#!forum/gonum-dev

[braunsonm]

This is more of a feature request. Currently there is no way to get a list of dataset names from a group from the API unless you did what I mentioned above.

It seems like something you could reasonably assume would be in the struct for a group.