feat(dev): Compare Two Lists — line set operations - #150
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One tool with six line/list set operations between two sources: merge & dedupe (union), in A not B, in B not A, common to both (intersection), in only one (symmetric difference), and duplicates (2+ across both). Options: ignore case, trim whitespace, ignore blank lines, sort. Swap A/B, copy, download .txt. Runs entirely in the browser. Comparison uses a normalised key (trim + case-fold) while preserving each line's original text (first occurrence wins). Pure lib with 17 unit tests. Bilingual (EN + ID) UI, SEO and OG. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Ubfx4XocHcECaL8twp9zsr
Deploying with
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| Status | Name | Latest Commit | Updated (UTC) |
|---|---|---|---|
| ✅ Deployment successful! View logs |
goodwebtools | 028cecd | Aug 03 2026, 09:14 AM |
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What
New Compare Two Lists tool (Dev) — paste two line-lists and combine them with six set operations in one tool:
Options: ignore case, trim whitespace, ignore blank lines, sort. Plus swap A/B, copy, and download .txt. Fully client-side — nothing uploaded.
Covers the three originally requested operations (merge+dedupe, subtract, find common) and adds the related ones you asked me to include.
Details
src/tools/dev/lineset.lib.ts— purecompareLines(a, b, mode, opts); comparison on a normalised key (trim + case-fold) while preserving each line's original text; 17 unit testssrc/islands/dev/CompareLists.tsx— thin island, liveuseMemoresultcompare-lists(beta); EN + ID SEO + OG/tools/compare-lists+/id/...)🤖 Generated with Claude Code