Version 2.8.12

New features

• feat: improve merging of NumpyArrays and simplification of UnionArrays + fix ak.almost_equal for UnionArrays by @ikrommyd in #3773
• feat: Add ak.sort() for CUDA backend by @shwina in #3750
• feat: Make ak.combinations faster on GPU by using cp.searchsorted to compute output list indexes by @shwina in #3795
• feat: add argmax implementation using CCCL by @maxymnaumchyk in #3777
• feat: make ak.combinations faster on GPU by using cp.searchsorted to compute output list indexes by @ianna in #3798
• feat: add argmin implementation using CCCL by @maxymnaumchyk in #3811

Bug-fixes and performance

• fix: incorrect type passed down for the mergeastable argument by @ikrommyd in #3779
• fix: fix ak.validity_error for typetracer-backed layouts with unknown length by @ikrommyd in #3784
• fix: make ak.enforce_type work with typetracers by @ikrommyd in #3764
• fix: ArrayBuilder.show() formatter forwarding by @X0708a in #3796
• fix: fix and test Form.length_zero/one_array() by @ikrommyd in #3810
• fix: make named axis thread-safe and start testing using multiple threads in CI by @ikrommyd in #3805

Other

• ci: use codecov token by @ariostas in #3769
• chore(ci): use macOS to test ML dependencies by @ariostas in #3774
• chore(deps): bump the actions group across 1 directory with 5 updates by @dependabot[bot] in #3778
• ci: xfail failing cudf tests until fixed by @ikrommyd in #3781
• chore: update pre-commit hooks by @pre-commit-ci[bot] in #3785
• chore: request for tensorflow in requirements only if python < 3.14 by @ikrommyd in #3787
• chore: fix noxfile on Intel macOS by @henryiii in #3815
• docs: add X0708a as a contributor for code by @allcontributors[bot] in #3797
• docs: add a comparison of different argmax implementations (using unary_transform, segmented_reduce and cuda-kernels) by @maxymnaumchyk in #3800
• docs: Document GPU backend and cuDF compatibility limitations by @X0708a in #3813

New Contributors

• @X0708a made their first contribution in #3796

Full Changelog: v2.8.11...v2.8.12

Version 2.8.11

New features

• feat: add behavior cls validation hook by @pfackeldey in #3710
• feat: add a playground for cccl studies by @pfackeldey in #3734
• feat: add cuda.compute implementation to CCCL study by @shwina in #3748
• feat: ability to optionally disable the caching of virtual arrays on themselves by @ikrommyd in #3741

Bug-fixes and performance

• fix: string array numpy conversion fails with int32 offsets from parquet by @DylanModesitt in #3697
• fix: only check length against empty form in ak.from_buffers if it is known by @ikrommyd in #3714
• fix: typestr respects now limit_cols for .show and repr_mimebundle by @pfackeldey in #3712
• fix: ArrayBuilder.__bool__ raises TypeError when builder length is 1 by @T90REAL in #3738
• fix: prevent teardown from crashing GPU test suite by @ianna in #3747
• fix: hide awkward.ak_* and awkward.str.akstr_* from 'awkward' and 'awkward.str' module by @pfackeldey in #3752
• fix: align multi-level indices before merge in to_dataframe() by @TaiSakuma in #3733
• fix: numba test failures on Python 3.14 by @ianna in #3757
• fix: incorrect passing of Index inside nplike function in to_IndexedOptionArray64 by @ikrommyd in #3727
• fix: weights should not be raised to the power n in the n-th moment calculation by @ikrommyd in #3729
• fix: ak.Record creation from iterable with nested dicts by @ikrommyd in #3728
• fix: keep track of buffer key instead of field path for VirtualNDArrays & PlaceholderArrays by @pfackeldey in #3751
• fix: typetracer nplike's all function leads to infinite recursion for axis=None by @ikrommyd in #3765

Other

• ci: fix compilation on self-hosted CI and test with multiple versions of CUDA by @ariostas in #3704
• chore: update acknowledgements to include NumFOCUS affiliation by @ianna in #3708
• chore: update pre-commit hooks by @pre-commit-ci[bot] in #3709
• chore: pytest log_level is better than log_cli_level by @henryiii in #3719
• chore: update requirements files for latest possible python versions by @ikrommyd in #3739
• chore(deps): bump the actions group with 2 updates by @dependabot[bot] in #3744
• chore: update pre-commit hooks by @pre-commit-ci[bot] in #3754
• chore: Remove CUDA 11 support by @shwina in #3758
• chore(ci): use macos-15-intel for x86 wheel building and testing by @ariostas in #3720
• docs: add new versions to version selector by @ariostas in #3707
• docs: 3.14 is supported by @henryiii in #3717
• docs: add T90REAL as a contributor for code by @allcontributors[bot] in #3742
• docs: Add dependency and version change guidelines by @ianna in #3745
• docs: add shwina as a contributor for code by @allcontributors[bot] in #3759
• docs: Add an example summation reducer using cccl by @maxymnaumchyk in #3762

New Contributors

• @T90REAL made their first contribution in #3738
• @shwina made their first contribution in #3748

Full Changelog: v2.8.10...v2.8.11

Version 2.8.10

New features

• feat: preserve field order when replacing existing fields in with_field by @DylanModesitt in #3681
• feat: add to_/from_safetensors by @pfackeldey in #3685

Bug-fixes and performance

• fix: update image cell in thinking-in-arrays.ipynb by @ianna in #3660
• fix: prefix with an underscore unused variables by @ianna in #3672
• fix(ci): fix issues with dependencies for GPU tests by @ariostas in #3673
• fix: convert integer-like objects to python integers in shapes by @ikrommyd in #3662
• fix: avoid recursion limit when concatenating EmptyArrays by @ikrommyd in #3664
• fix: only check VirtualNDArray's shape versus count in from_buffers if both are known by @ikrommyd in #3667
• fix: preserve the type when indexed by an empty array by @TaiSakuma in #3678
• fix: ensure masked string/bytestring dtypes can hold 'nan' fill value… by @JamesBrofos in #3692
• fix: add missing units to datetime/timedelta in a test by @TaiSakuma in #3688
• fix: pass attrs parameter to wrap_layout in from_* by @DylanModesitt in #3687
• fix: use jax's __setitem__ syntax in ak.merge_union_of_records to make it work with the jax backend by @ikrommyd in #3596

Other

• chore(deps): bump pypa/cibuildwheel from 3.1 to 3.2 in the actions group by @dependabot[bot] in #3665
• chore(deps): bump the actions group with 2 updates by @dependabot[bot] in #3670
• chore: update pre-commit hooks by @pre-commit-ci[bot] in #3671
• chore: mac os 13 hosted runner image is closing down by @ianna in #3666
• chore: improve pyproject.toml from sp-repo-review checks by @henryiii in #3677
• chore(deps): bump astral-sh/setup-uv from 6 to 7 in the actions group by @dependabot[bot] in #3689
• chore: small inconsistency/typo with the non-jax case below by @ikrommyd in #3698
• chore(deps): bump the actions group with 2 updates by @dependabot[bot] in #3699
• docs: add TaiSakuma as a contributor for code by @allcontributors[bot] in #3679
• docs: add DylanModesitt as a contributor for code by @allcontributors[bot] in #3684
• docs: add JamesBrofos as a contributor for code by @allcontributors[bot] in #3693
• test: add cuda tests for virtual arrays by @ikrommyd in #3459
• test: add a test on flattering empty arrays by @TaiSakuma in #3700

New Contributors

• @DylanModesitt made their first contribution in #3681
• @TaiSakuma made their first contribution in #3678
• @JamesBrofos made their first contribution in #3692

Full Changelog: v2.8.9...v2.8.10

Version 2.8.9

New features

• feat: cuda reducers - add combinations for n>2, argmin and argmax, and fix min. by @ianna in #3645
• feat: add axis=None reducer specializations by @pfackeldey in #3653
• feat: add 'how=' to ak.unzip by @pfackeldey in #3655

Bug-fixes and performance

• fix: virtual array deep copy generator reference + better error message for assert_never by @ikrommyd in #3644
• fix: SVG bug in diagram depicting ragged aggregation by @jpivarski in #3648
• fix: json signedness fixes by @ianna in #3651
• fix: cartoon combinations by @ianna in #3654
• perf: detect & fastpath no-op range slices in all layout types by @pfackeldey in #3642

Other

• chore(deps): bump the actions group with 4 updates by @dependabot[bot] in #3650
• docs: fix touch_data typo by @ikrommyd in #3641
• docs: update CONTRIBUTING guidelines by @ianna in #3656

Full Changelog: v2.8.8...v2.8.9

Version 2.8.8

New features

• feat: adapt __array__ according to numpy guidelines by @ikrommyd in #3592
• feat: ensure ability to pickle ak.Array and ak.Record with VirtualArray buffers by @ikrommyd in #3612
• feat: skip materialization of placeholders in to_packed by @ikrommyd in #3637

Bug-fixes and performance

• fix: catch off-by-one out of bound error by @agoose77 in #3621
• fix: avoid unnecessary recursion if not needed by @pfackeldey in #3611
• fix: VirtualArray's deep copy + accidental .data access by @ikrommyd in #3599
• fix: allow arrays with Nones in single argument usage of ak.where by @ikrommyd in #3563
• fix: properly handle VirtualArray in nplike.asarray by @ikrommyd in #3597
• fix: do not materialize before custom pickling by @ikrommyd in #3633
• fix: do not force LE data-order in form.py by @nileshpatra in #3629
• fix: make to_packed work for typetracer backed IndexedOptionArray, BitMaskedArray, and UnionArray by @ikrommyd in #3608
• perf: add slots to virtual array to reduce instance alloc size by @pfackeldey in #3613
• perf: avoid method chaining for some shape_generators by @pfackeldey in #3615

Other

• chore: update pre-commit hooks by @pre-commit-ci[bot] in #3602
• chore(deps): bump the actions group across 1 directory with 3 updates by @dependabot[bot] in #3624
• chore: remove materialize_if_virtual by @ikrommyd in #3632
• chore(deps): bump actions/attest-build-provenance from 2.4.0 to 3.0.0 in the actions group by @dependabot[bot] in #3635
• chore: update pre-commit hooks by @pre-commit-ci[bot] in #3634
• test: test the virtual array generator before calling .shape in copy test by @ikrommyd in #3631
• refactor: VirtualArrays by @pfackeldey in #3620
• docs: add nileshpatra as a contributor for code by @allcontributors[bot] in #3638
• ci: move job to deploy doc preview to a separte workflow by @ariostas in #3627
• ci: doc previews for PRs from forks by @ariostas in #3625

New Contributors

• @nileshpatra made their first contribution in #3629

Full Changelog: v2.8.7...v2.8.8

Version 2.8.7

New features

(none!)

Bug-fixes and performance

(none!)

Other

• refactor: add jax DeprecationWarning by @ianna in #3609

Full Changelog: v2.8.6...v2.8.7

Version 2.8.6

New features

(none!)

Bug-fixes and performance

• fix: first maybe materialize, then check for PlaceholderArray by @pfackeldey in #3566
• fix: ak.any and ak.combinations with cuda backend kernels by @ianna in #3561
• fix: length0 array repr by @pfackeldey in #3564
• fix: to_buffers for duplicate fields in records by @pfackeldey in #3567
• fix: overflow error when concatenating more than 128 regular arrays by @ikrommyd in #3568
• fix: patch emscripten RPath by @henryiii in #3575
• fix: removal of pyarrow.lib.PyExtensionType in pyarrow 21 by @ikrommyd in #3581
• fix: filter also for new (v0.7.0) LinearizeTracer type by @pfackeldey in #3586
• refactor: define common nplike method to get pointer to memory by @pfackeldey in #3565

Other

• chore: update CITATION.cff by @ianna in #3571
• chore(ci): bump minimal pyarrow version being tested by @ariostas in #3584
• chore(deps): bump pypa/cibuildwheel from 3.0 to 3.1 in the actions group by @dependabot[bot] in #3591
• chore: update zenodo citation in README by @ikrommyd in #3574
• chore: fix pyodide link in README by @ikrommyd in #3576
• chore: update pre-commit hooks by @pre-commit-ci[bot] in #3569
• docs: add missing funding badges by @ariostas in #3588

Full Changelog: v2.8.5...v2.8.6

Version 2.8.5

New features

(none!)

Bug-fixes and performance

• fix: cudf strings column by @ianna in #3555
• fix: ak.categories should return None if no categories are present by @pfackeldey in #3553
• fix: combinations explicit cuda test for n == 0 by @ianna in #3554
• fix: cuda atomicMin and atomicMax for <double>s by @Moelf in #3545
• fix: error if a complex JAX arrays type is passed to Awkward's C++ kernels by @pfackeldey in #3546
• fix: too many dashes in jupyter repr by @pfackeldey in #3552
• fix: use older manylinux for CPython 3.10 and 3.9 by @henryiii in #3558
• fix: use std::memcpy instead of *reinterpret_cast by @APN-Pucky in #3514

Other

• chore(deps): bump the actions group across 1 directory with 2 updates by @dependabot in #3549
• chore: use PEP 639 license by @henryiii in #3559
• ci: add workflow to run GPU tests on selfhosted runner by @ariostas in #3543
• ci: run cuda kernel tests by @ariostas in #3551
• docs: Add MODE talk + update publications by @Saransh-cpp in #3547
• docs: add APN-Pucky as a contributor for code by @allcontributors in #3557
• docs: add Moelf as a contributor for code by @allcontributors in #3556

Full Changelog: v2.8.4...v2.8.5

Version 2.8.4

New features

(none!)

Bug-fixes and performance

• fix: simplify unmasked array by @ianna in #3518
• fix: numpy 2.3 compatibility by @ikrommyd in #3534
• fix: improve type consistency in to_packed for num_none by @ianna in #3538
• fix: make awkward compatible with numexpr 2.11 by @ikrommyd in #3533
• fix: do not use atol=np.inf in a jax test and xfail sorting test which fails by @ikrommyd in #3542

Other

• chore: update pre-commit hooks by @pre-commit-ci in #3523
• chore: update pre-commit hooks by @ianna in #3524
• chore: update pre-commit hooks by @pre-commit-ci in #3515
• chore: restrict numpy and numexpr for now by @ianna in #3539
• ci: change pre-commit autoupdate to a monthly schedule by @ariostas in #3516
• ci: fix Windows 3.13 by @henryiii in #3536
• revert: "fix: numpy 2.3 compatibility" by @ianna in #3537
• test: fix test names by @Saransh-cpp in #3532

Full Changelog: v2.8.3...v2.8.4

Version 2.8.3

New features

• feat: add a ref to the original 'unclipped' buffer generator by @pfackeldey in #3497
• feat: improve assertion error message in kernels by @pfackeldey in #3498
• feat: do not allow records, primitives, or bare strings in ak.materialize (+ docs display fix) by @ikrommyd in #3501

Bug-fixes and performance

• fix: more meaningful assertion error in length calculation in case of column optimization problems in dask-awkward by @ikrommyd in #3499
• fix: use cmath instead of bit mask for infinite doubles by @APN-Pucky in #3505
• fix: runtime for ak.combinations with cuda backend by @ianna in #3502
• fix: pass backend to RecordArray by @ianna in #3507
• fix: pass backend to EmptyArray by @ikrommyd in #3508
• fix: Python 3.13 classifier to awkward-cpp by @APN-Pucky in #3510

Other

• docs: fix a small typo in IndexedArray docstring by @ikrommyd in #3496
• chore: update pre-commit hooks by @pre-commit-ci in #3500
• chore: update pre-commit hooks by @pre-commit-ci in #3506

New Contributors

• @APN-Pucky made their first contribution in #3505

Full Changelog: v2.8.2...v2.8.3