Yi-Mu "Enoch" Chen

Reduction to unique elements

5

### Description of new feature Reduce array elements to unique along a specific axis, similar to [`numpy.unique`][npunique], but preserving dimensions: ``` x = awkward.Array([[1,1,2,3,],[4,5,5]]) y = awkward.unique(x, axis=-1) # y...

**Describe the bug** When reducing a 1-D histogram to 0-D via a hist.Hist.profile call, the resulting MeanView does not handle method calls as expected: **Steps to reproduce** ```python import hist...

[FEATURE] Non-uniform rebinning

10

Right now, histograms can only be rebinned by some integer amount via the `hist.rebin` indicator. I would be nice if there was some way to rebin a certain axis arbitrary...

Ungraceful failing when data isn't properly touched

7

I'm attempting to implement a function over an awkward collection and exposing it to `dask_awkward`. I've noticed that if the correct touching is not implemented (see the `arr.y.layout._touch_data` line), then...

Performance issue with `repartition`

27

I was testing a workflow of file skimming, and to account for the possibility that the rate that events of interest is very low in the skimming scheme, I attempted...

### Version of Awkward Array 2.6.6 ### Description and code to reproduce When working with pair-wise computations with `ak.cartesian`, if a collection was reordered using a `None`-able array, the computation...

Unserializable histogram generated if computed without fill call

3

Originally posted here: https://github.com/scikit-hep/hist/issues/586 And I found that this issue can be replicated entirely upstream using just `dask-histogram` ```python import pickle import boost_histogram import dask import dask_histogram.boost import numpy h...

**Describe the bug** `hist.dask.Hist` generates an unpickleable object if computed with no `fill` call **Steps to reproduce** ```python import pickle import dask import dask_awkward import hist.dask import numpy import awkward...