collections/columnar_view_utils library
Columnar view of list<Map<String, Object?>> for analytics — roadmap #470.
Functions
-
columnValues(
List< Map< rows, String key) → List<String, Object?> >Object?> -
Returns a single column
keyfromrowsas List<Object?>. Audited: 2026-06-12 11:26 EDT -
toColumnar(
List< Map< rows) → Map<String, Object?> >String, List< Object?> > -
Returns map of key -> list of values, using the keys of the FIRST row as the
column schema. Keys that appear only in later rows are NOT included; rows
missing a first-row key contribute
nullfor that column. Pre-normalize the rows (union their keys) if every key must appear. Audited: 2026-06-12 11:26 EDT