Table

In std/format.

type Table<R>

Rows of type R under ordered columns: the shape every format's encoder writes as a table. R is a record type or Data; Table written without it is Table<Data>.

fn Table<T>(rows: Collection<T>, columns: List<String> = []) : Table<T>

A Table of rows, its columns named by columns in the order they are written; with columns empty, the columns are the first row's fields in the order the row holds them. Over a declared record, a column naming no field is a type error; over Data, a missing field is an empty cell. Table([{a: 1, b: 2}], ["b"]) | csv is the header b and the row 2.