GH-50434: [Ruby] Add ArrowFormat::Date{32,64}.new(values)

[kou]

Rationale for this change

Building a date{32,64} Arrow array from Ruby objects is convenient.

What changes are included in this PR?

Accept ArrowFormat::Date{32,64}.new(values).

Are these changes tested?

Yes.

Are there any user-facing changes?

Yes.

• GitHub Issue: [Ruby] Add ArrowFormat::Date{32,64}.new(values) #50434

[github-actions]

⚠️ GitHub issue #50434 has been automatically assigned in GitHub to PR creator.

[Copilot]

Pull request overview

This PR enables constructing ArrowFormat::Date32Array and ArrowFormat::Date64Array directly from Ruby value arrays (including nils) by providing the missing packing templates needed for buffer construction, and adds targeted tests for the new behavior.

Changes:

• Add pack_template implementations for Date32Type and Date64Type so Date{32,64}Array.new(values) can build value buffers.
• Add new unit tests for Date32Array and Date64Array initialization and equality/slicing behavior.
• Minor test refactor across several numeric array tests to use array splat ([0, *values, 0]) instead of concatenation.

Reviewed changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
ruby/red-arrow-format/lib/arrow-format/type.rb	Provide pack_template for Date32/Date64 types to support array construction from Ruby values.
ruby/red-arrow-format/test/test-date32-array.rb	New tests covering Date32Array.new(values) and equality/slicing behavior.
ruby/red-arrow-format/test/test-date64-array.rb	New tests covering Date64Array.new(values) and equality/slicing behavior.
ruby/red-arrow-format/test/test-int8-array.rb	Use splat-based array construction in slice-related tests.
ruby/red-arrow-format/test/test-int16-array.rb	Use splat-based array construction in slice-related tests.
ruby/red-arrow-format/test/test-int32-array.rb	Use splat-based array construction in slice-related tests.
ruby/red-arrow-format/test/test-int64-array.rb	Use splat-based array construction in slice-related tests.
ruby/red-arrow-format/test/test-uint8-array.rb	Use splat-based array construction in slice-related tests.
ruby/red-arrow-format/test/test-uint16-array.rb	Use splat-based array construction in slice-related tests.
ruby/red-arrow-format/test/test-uint32-array.rb	Use splat-based array construction in slice-related tests.
ruby/red-arrow-format/test/test-uint64-array.rb	Use splat-based array construction in slice-related tests.
ruby/red-arrow-format/test/test-float32-array.rb	Use splat-based array construction in slice-related tests.
ruby/red-arrow-format/test/test-float64-array.rb	Use splat-based array construction in slice-related tests.

[kou]

+1

[conbench-apache-arrow]

After merging your PR, Conbench analyzed the 4 benchmarking runs that have been run so far on merge-commit 32513fe.

There were no benchmark performance regressions. 🎉

The full Conbench report has more details. It also includes information about 1 possible false positive for unstable benchmarks that are known to sometimes produce them.