Function isTupleOHLCDataPoint

examples/candlestick-streaming/main.ts:63–65

(
  p: OHLCDataPoint
)

let lastSimPerfNow = performance.now();

const isTupleOHLCDataPoint = (
  p: OHLCDataPoint
): p is readonly [timestamp: number, open: number, close: number, low: number, high: number] => Array.isArray(p);

const getTimestamp = (p: OHLCDataPoint): number => (isTupleOHLCDataPoint(p) ? p[0] : p.timestamp);
const getClose = (p: OHLCDataPoint): number => (isTupleOHLCDataPoint(p) ? p[2] : p.close);