Function isTupleDataPoint

examples/interactive/main.ts:112–112

(p: DataPoint)

): ChartGPUOptions => {
  type DataPointTupleLocal = readonly [x: number, y: number, size?: number];
  const isTupleDataPoint = (p: DataPoint): p is DataPointTupleLocal => Array.isArray(p) && p.length >= 2;
  const getX = (p: DataPoint): number => (isTupleDataPoint(p) ? p[0] : p.x);
  const first = seriesA[0];
  const last = seriesA.length > 0 ? seriesA[seriesA.length - 1] : undefined;