private double calcStandardDeviation()

in concurrency-loadbalancer-m3/src/main/java/com/uber/concurrency/loadbalancer/TallyMetricsTaskListener.java [133:140]

• 8 lines of code
• 1 McCabe index (conditional complexity)

    private double calcStandardDeviation(Function<EWMARates, EWMA> mapper) {
        double[] rates = taskRates.values().stream()
                .map(mapper)
                .map(o->o.getRate(TimeUnit.SECONDS))
                .mapToDouble(d->d)
                .toArray();
        return STANDARD_DEVIATION.evaluate(rates);
    }