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a1

2.2.0sjhorn/a1 ↗New releases in your daily digest, changelog included.

A package that implements A1 Notation used in spreadsheets and worksheets

Last release 8 months ago
31 Jan 2026
Ships unpredictably
gaps range from 9 days to 1.6 years
Nearly every release is documented
notes for 18 of 18 stable releases
Nothing withdrawn
no release was ever pulled
3 years old
18 releases · first in 2024

Release timeline

18 releases since 2024

202420252026

Releases

2.2.031 Jan 2026
Parse and round-trip $A$1, $A1, A$1 absolute reference markers. Equality and hashCode remain position-based only.
Parse and round-trip $A$1, $A1, A$1 absolute reference markers.
Equality and hashCode remain position-based only.

Co-Authored-By: Claude Opus 4.5 noreply@anthropic.com
Open source →
Additional notes
Added $ absolute reference notation support ($A$1, $A1, A$1, A1)

Added columnAbsolute and rowAbsolute fields to A1, A1Partial, and A1Reference

toString() round-trips absolute markers: $A$1 parses and serializes correctly

Equality and hashCode remain position-based (absolute state does not affect equality)

Added A1.copyWith() for changing absolute flags on existing references
Open source →
2.1.031 Jan 2026
Added A1.maxRows and A1.maxColumns constants with bounds validation on construction

One column per month.

Added A1.maxRows and A1.maxColumns constants with bounds validation on construction
Added A1Range.collapsed() factory, isCollapsed getter, rowIterable() and columnIterable() methods
Refactored [Quadtree] internals from array-based to map-based with Quadrant enum for correctness
Improved internal naming for row/column partial helpers
Fixed A1Reference.parse to treat bare cell/range strings (e.g. A1, A1:B2) as cell references instead of worksheet names
Upgraded to petitparser ^7.0.1 and lints ^6.1.0

Open source →

2.0.011 Jun 2024Breaking

Breaking changes on comparison of [A1], to provide deterministic binary searches

Breaking changes on comparison of [A1], to provide deterministic binary searches
Addition of [A1RangeSearch] that features a binary, quadtree searches and merge movements across mutliple [A1Range]s for a match
Simplified [A1Range], [A1] and [A1Partial] to use rectangle-like logic, even for unbounded ranges
Adding left,top,right,bottom as well as columnSpan and rowSpan to [A1Range]
Refactored numerous tests to match the new more deterministic logic for comparisons, column/row matches

Open source →

1.1.025 May 2024

Add features for A1Range to selection single border for left,top,right,bottom of range

Add features for A1Range to selection single border for left,top,right,bottom of range
Fix range [A1Range] comparison to compare whole single/multi-column, single/multi-whole row, whole sheet
Bug fix [A1Range] hashCode for range A1:A1, as this would return zero (0) for single value ranges like A1:A1, B2:B2
Add intersect, subtract and overlayRanges to assist with formatting ranges in a worksheet
Worthy of a minor version bump to 1.1.0

Open source →

1.0.1329 Apr 2024

Bug fix for hasRow, hasColumn for whole columns/rows ie. A:A, 1:1 cases

Bug fix for hasRow, hasColumn for whole columns/rows ie. A:A, 1:1 cases
Add features to check if a partial represents a whole row or column or either
Add A1Range.all and A1Partial.all to support these single use-cases

Open source →

1.0.1226 Apr 2024

Fixeg bug in hasCorner or the A:A, 2:2 cases ie. whole row or column selection

Fixeg bug in hasCorner or the A:A, 2:2 cases ie. whole row or column selection

Open source →

1.0.1126 Apr 2024

Add hasRow/Column method for A1Range to help with showing selection in a spreadsheet UI

Add hasRow/Column method for A1Range to help with showing selection in a spreadsheet UI
Fixed bug that didn't allow parsing A1Range A:C (cols)

Open source →

1.0.1025 Apr 2024

Add method for A1Range to check if an A1 is in one of its corners, typically a suitable place for an anchor cell

Add method for A1Range to check if an A1 is in one of its corners, typically a suitable place for an anchor cell

Open source →

1.0.923 Apr 2024

Fix edge case in a A1Range where the FROM has a greater column than the TO

Fix edge case in a A1Range where the FROM has a greater column than the TO

Open source →

1.0.823 Apr 2024

Enhanced A1Range with an optional anchor cell

Enhanced A1Range with an optional anchor cell

Open source →

1.0.723 Apr 2024

Enhanced A1Range with fromA1s method.

Enhanced A1Range with fromA1s method.
Enhanced A1Partial with fromA1 method.

Open source →

1.0.67 Apr 2024

Enhanced A1Partial to accept a vector

Enhanced A1Partial to accept a vector
Moved the int to A1 Letters into an extension on int

Open source →

1.0.57 Apr 2024

Added testing is an A1 is in an A1Range with contains method

Added testing is an A1 is in an A1Range with contains method
Slight tweak on comparing a A1Partial eg. A with 1, it will now use the larger index rather than have A always be larger
Adjusted tests for above tweak

Open source →

1.0.42 Apr 2024

Added support for A1 mapping as an extension on Map to Map to assist with A1 moves

Added support for A1 mapping as an extension on Map<String,String> to Map<A1,A1> to assist with A1 moves

Open source →

1.0.31 Apr 2024

Added support for A1 as an extension on Set to simplify creating an a1 set from String

Added support for A1 as an extension on Set to simplify creating an a1 set from String

Open source →

1.0.230 Mar 2024

Start matching GitHub releases with pub.dev

Open source →

Additional notes

Added A1Range and A1Reference examples to readme and example
Adjusted area to be a double for A1 and build this into a range
Fixed minor bug with parsing a partial range in a reference
Added github action build pipeline with coverage
Move test coverage to 100%

Open source →

1.0.128 Mar 2024

Minor fixes in docs and imports

Minor fixes in docs and imports
Added icon

Open source →

1.0.028 Mar 2024

Initial version that implements

Initial version that implements

Open source →

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