{"adoption": {"forks": 74, "observed_at": "2026-08-28T04:04:59.728810+00:00", "stars": 1534}, "canonical_url": "https://ross.abutalabs.com/products/arquero", "card": {"archived": false, "artifact_type": "library", "description": "Query processing and transformation of array-backed data tables.", "domain": ["data-science", "developer-tools", "analytics"], "enriched": true, "function": ["database", "etl", "data-science", "serialization"], "health_score": 47, "homepage": "https://idl.uw.edu/arquero/", "language": "JavaScript", "license": "BSD-3-Clause", "license_family": "permissive", "maturity": "stable", "member_repos": ["uwdata/arquero"], "name": "uwdata/arquero", "platform": ["browser", "cross-platform"], "pushed_at": "2025-05-29T22:26:36+00:00", "repo": "uwdata/arquero", "stars": 1534, "tags": ["dataframe", "query-processing", "relational-algebra", "dplyr-inspired", "apache-arrow", "column-oriented", "data-wrangling", "table-transformations", "data-engineering", "nodejs", "javascript"], "topics": ["data", "query", "database", "table", "dataframe", "transform", "arrays"], "urls": [], "use_cases": ["filter and transform large in-memory tables in JavaScript", "perform group-by aggregations and window functions on data frames", "join and reshape datasets in the browser or Node.js", "query Apache Arrow columnar data with a fluent API", "clean and wrangle CSV or JSON data for analysis", "run dplyr-style data pipelines without a database server"], "what_it_is": "Arquero is a JavaScript library for query processing and transformation of array-backed, column-oriented data tables. It offers a fluent, dplyr-inspired API supporting filter, aggregation, window, join, and reshaping operations over arrays, typed arrays, and Apache Arrow columns.", "when_to_avoid": ["you need persistent storage or SQL queries over disk-based data", "you work primarily in Python or R with pandas or dplyr", "you need distributed or out-of-core processing of very large datasets", "you only need simple array utilities without table semantics"], "when_to_choose": ["you need fast in-memory data frame operations in JavaScript or TypeScript", "you want dplyr-like table verbs in the browser or Node.js", "you work with Apache Arrow columns or typed arrays", "you need million+ row transformations without a backend database"]}, "data_as_of": "2026-08-30T08:39:29.467469+00:00", "members": [{"path": "/products/arquero", "repo": "uwdata/arquero", "role": "main", "score": 45}], "provenance": {"archived": {"kind": "observed", "observed_at": "2026-08-28T04:04:59.728810+00:00", "source": "github"}, "artifact_type": {"confidence": null, "enriched_at": "2026-08-30T04:31:13.463222+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "b536a5c22bc5375385d34f6be512924e30bc552f37e249d64762607dfe0f71af", "fetched_at": "2026-08-28T04:04:59.728810+00:00", "kind": "readme", "missing": false, "url": "https://github.com/uwdata/arquero"}, {"content_hash": "1e0f1b0a3c44ae5ddfb59e2ba754b0c035d18970556a40548588d4a9b1fdbfa0", "fetched_at": "2026-08-29T11:33:23.405516+00:00", "kind": "homepage", "missing": false, "url": "https://idl.uw.edu/arquero/"}, {"content_hash": "ae9e0a6f5ef4cc3447783b807af740cfd42208b71b31bbfba93d58f229611218", "fetched_at": "2026-08-29T11:33:23.414698+00:00", "kind": "registry_npm", "missing": false, "url": "https://registry.npmjs.org/arquero"}], "taxonomy_version": 1}, "description": {"kind": "observed", "observed_at": "2026-08-28T04:04:59.728810+00:00", "source": "github"}, "domain": {"confidence": null, "enriched_at": "2026-08-30T04:31:13.463222+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "b536a5c22bc5375385d34f6be512924e30bc552f37e249d64762607dfe0f71af", "fetched_at": "2026-08-28T04:04:59.728810+00:00", "kind": "readme", "missing": false, "url": "https://github.com/uwdata/arquero"}, {"content_hash": "1e0f1b0a3c44ae5ddfb59e2ba754b0c035d18970556a40548588d4a9b1fdbfa0", "fetched_at": "2026-08-29T11:33:23.405516+00:00", "kind": "homepage", "missing": false, "url": "https://idl.uw.edu/arquero/"}, {"content_hash": "ae9e0a6f5ef4cc3447783b807af740cfd42208b71b31bbfba93d58f229611218", "fetched_at": "2026-08-29T11:33:23.414698+00:00", "kind": "registry_npm", "missing": false, "url": "https://registry.npmjs.org/arquero"}], "taxonomy_version": 1}, "enriched": {"inputs": [], "kind": "computed", "method": "enrichment_status"}, "function": {"confidence": null, "enriched_at": "2026-08-30T04:31:13.463222+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "b536a5c22bc5375385d34f6be512924e30bc552f37e249d64762607dfe0f71af", "fetched_at": "2026-08-28T04:04:59.728810+00:00", "kind": "readme", "missing": false, "url": "https://github.com/uwdata/arquero"}, {"content_hash": "1e0f1b0a3c44ae5ddfb59e2ba754b0c035d18970556a40548588d4a9b1fdbfa0", "fetched_at": "2026-08-29T11:33:23.405516+00:00", "kind": "homepage", "missing": false, "url": "https://idl.uw.edu/arquero/"}, {"content_hash": "ae9e0a6f5ef4cc3447783b807af740cfd42208b71b31bbfba93d58f229611218", "fetched_at": "2026-08-29T11:33:23.414698+00:00", "kind": "registry_npm", "missing": false, "url": "https://registry.npmjs.org/arquero"}], "taxonomy_version": 1}, "health_score": {"inputs": ["days_since_push", "days_since_release", "archived"], "kind": "computed", "method": "health_v1"}, "homepage": {"kind": "observed", "observed_at": "2026-08-28T04:04:59.728810+00:00", "source": "github"}, "language": {"kind": "observed", "observed_at": "2026-08-28T04:04:59.728810+00:00", "source": "github"}, "license": {"kind": "observed", "observed_at": "2026-08-28T04:04:59.728810+00:00", "source": "github"}, "license_family": {"inputs": ["license"], "kind": "computed", "method": "license_family"}, "maturity": {"confidence": null, "enriched_at": "2026-08-30T04:31:13.463222+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "b536a5c22bc5375385d34f6be512924e30bc552f37e249d64762607dfe0f71af", "fetched_at": "2026-08-28T04:04:59.728810+00:00", "kind": "readme", "missing": false, "url": "https://github.com/uwdata/arquero"}, {"content_hash": "1e0f1b0a3c44ae5ddfb59e2ba754b0c035d18970556a40548588d4a9b1fdbfa0", "fetched_at": "2026-08-29T11:33:23.405516+00:00", "kind": "homepage", "missing": false, "url": "https://idl.uw.edu/arquero/"}, {"content_hash": "ae9e0a6f5ef4cc3447783b807af740cfd42208b71b31bbfba93d58f229611218", "fetched_at": "2026-08-29T11:33:23.414698+00:00", "kind": "registry_npm", "missing": false, "url": "https://registry.npmjs.org/arquero"}], "taxonomy_version": 1}, "member_repos": {"kind": "observed", "observed_at": "2026-08-28T04:04:59.728810+00:00", "source": "github"}, "name": {"kind": "observed", "observed_at": "2026-08-28T04:04:59.728810+00:00", "source": "github"}, "platform": {"confidence": null, "enriched_at": "2026-08-30T04:31:13.463222+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "b536a5c22bc5375385d34f6be512924e30bc552f37e249d64762607dfe0f71af", "fetched_at": "2026-08-28T04:04:59.728810+00:00", "kind": "readme", "missing": false, "url": "https://github.com/uwdata/arquero"}, {"content_hash": "1e0f1b0a3c44ae5ddfb59e2ba754b0c035d18970556a40548588d4a9b1fdbfa0", "fetched_at": "2026-08-29T11:33:23.405516+00:00", "kind": "homepage", "missing": false, "url": "https://idl.uw.edu/arquero/"}, {"content_hash": "ae9e0a6f5ef4cc3447783b807af740cfd42208b71b31bbfba93d58f229611218", "fetched_at": "2026-08-29T11:33:23.414698+00:00", "kind": "registry_npm", "missing": false, "url": "https://registry.npmjs.org/arquero"}], "taxonomy_version": 1}, "pushed_at": {"kind": "observed", "observed_at": "2026-08-28T04:04:59.728810+00:00", "source": "github"}, "repo": {"kind": "observed", "observed_at": "2026-08-28T04:04:59.728810+00:00", "source": "github"}, "stars": {"kind": "observed", "observed_at": "2026-08-28T04:04:59.728810+00:00", "source": "github"}, "tags": {"confidence": null, "enriched_at": "2026-08-30T04:31:13.463222+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "b536a5c22bc5375385d34f6be512924e30bc552f37e249d64762607dfe0f71af", "fetched_at": "2026-08-28T04:04:59.728810+00:00", "kind": "readme", "missing": false, "url": "https://github.com/uwdata/arquero"}, {"content_hash": "1e0f1b0a3c44ae5ddfb59e2ba754b0c035d18970556a40548588d4a9b1fdbfa0", "fetched_at": "2026-08-29T11:33:23.405516+00:00", "kind": "homepage", "missing": false, "url": "https://idl.uw.edu/arquero/"}, {"content_hash": "ae9e0a6f5ef4cc3447783b807af740cfd42208b71b31bbfba93d58f229611218", "fetched_at": "2026-08-29T11:33:23.414698+00:00", "kind": "registry_npm", "missing": false, "url": "https://registry.npmjs.org/arquero"}], "taxonomy_version": 1}, "topics": {"kind": "observed", "observed_at": "2026-08-28T04:04:59.728810+00:00", "source": "github"}, "urls": {"kind": "observed", "observed_at": "2026-08-28T04:04:59.728810+00:00", "source": "github"}, "use_cases": {"confidence": null, "enriched_at": "2026-08-30T04:31:13.463222+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "b536a5c22bc5375385d34f6be512924e30bc552f37e249d64762607dfe0f71af", "fetched_at": "2026-08-28T04:04:59.728810+00:00", "kind": "readme", "missing": false, "url": "https://github.com/uwdata/arquero"}, {"content_hash": "1e0f1b0a3c44ae5ddfb59e2ba754b0c035d18970556a40548588d4a9b1fdbfa0", "fetched_at": "2026-08-29T11:33:23.405516+00:00", "kind": "homepage", "missing": false, "url": "https://idl.uw.edu/arquero/"}, {"content_hash": "ae9e0a6f5ef4cc3447783b807af740cfd42208b71b31bbfba93d58f229611218", "fetched_at": "2026-08-29T11:33:23.414698+00:00", "kind": "registry_npm", "missing": false, "url": "https://registry.npmjs.org/arquero"}], "taxonomy_version": 1}, "what_it_is": {"confidence": null, "enriched_at": "2026-08-30T04:31:13.463222+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "b536a5c22bc5375385d34f6be512924e30bc552f37e249d64762607dfe0f71af", "fetched_at": "2026-08-28T04:04:59.728810+00:00", "kind": "readme", "missing": false, "url": "https://github.com/uwdata/arquero"}, {"content_hash": "1e0f1b0a3c44ae5ddfb59e2ba754b0c035d18970556a40548588d4a9b1fdbfa0", "fetched_at": "2026-08-29T11:33:23.405516+00:00", "kind": "homepage", "missing": false, "url": "https://idl.uw.edu/arquero/"}, {"content_hash": "ae9e0a6f5ef4cc3447783b807af740cfd42208b71b31bbfba93d58f229611218", "fetched_at": "2026-08-29T11:33:23.414698+00:00", "kind": "registry_npm", "missing": false, "url": "https://registry.npmjs.org/arquero"}], "taxonomy_version": 1}, "when_to_avoid": {"confidence": null, "enriched_at": "2026-08-30T04:31:13.463222+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "b536a5c22bc5375385d34f6be512924e30bc552f37e249d64762607dfe0f71af", "fetched_at": "2026-08-28T04:04:59.728810+00:00", "kind": "readme", "missing": false, "url": "https://github.com/uwdata/arquero"}, {"content_hash": "1e0f1b0a3c44ae5ddfb59e2ba754b0c035d18970556a40548588d4a9b1fdbfa0", "fetched_at": "2026-08-29T11:33:23.405516+00:00", "kind": "homepage", "missing": false, "url": "https://idl.uw.edu/arquero/"}, {"content_hash": "ae9e0a6f5ef4cc3447783b807af740cfd42208b71b31bbfba93d58f229611218", "fetched_at": "2026-08-29T11:33:23.414698+00:00", "kind": "registry_npm", "missing": false, "url": "https://registry.npmjs.org/arquero"}], "taxonomy_version": 1}, "when_to_choose": {"confidence": null, "enriched_at": "2026-08-30T04:31:13.463222+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "b536a5c22bc5375385d34f6be512924e30bc552f37e249d64762607dfe0f71af", "fetched_at": "2026-08-28T04:04:59.728810+00:00", "kind": "readme", "missing": false, "url": "https://github.com/uwdata/arquero"}, {"content_hash": "1e0f1b0a3c44ae5ddfb59e2ba754b0c035d18970556a40548588d4a9b1fdbfa0", "fetched_at": "2026-08-29T11:33:23.405516+00:00", "kind": "homepage", "missing": false, "url": "https://idl.uw.edu/arquero/"}, {"content_hash": "ae9e0a6f5ef4cc3447783b807af740cfd42208b71b31bbfba93d58f229611218", "fetched_at": "2026-08-29T11:33:23.414698+00:00", "kind": "registry_npm", "missing": false, "url": "https://registry.npmjs.org/arquero"}], "taxonomy_version": 1}}, "score": {"components": {"activity": 24, "longevity": 100, "rhythm": 40}, "computed_at": "2026-09-03T02:20:16.233290+00:00", "flags": [], "formula": "round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)", "inputs": {"age_days": 2192, "days_push": 461, "days_rel": 461, "gap_med": 13, "n_releases_24m": 8}, "score": 45, "version": 2}, "staleness": {"enrichment_outdated": false, "low_confidence": false, "scrape_days": 9, "stale_scrape": false}}