Function fieldNames

docs/app/js/sanddance-app.js:116946–116949

(fields, as)

    return ()=>pulse.materialize(pulse.SOURCE).source;
}
function fieldNames(fields, as) {
    if (!fields) return null;
    return fields.map((f, i)=>as[i] || (0, _vegaUtil.accessorName)(f));
}
function partition$1(data, groupby, field) {
    const groups = [], get17 = (f)=>f(t);
    let map, i, n, t, k, g; // partition data points into groups