double stdev()

in lib/github_datatypes.dart [1950:1987]

• 36 lines of code
• 10 McCabe index (conditional complexity)

  double stdev() {
    double m = mean();
    double sum = 0.0;
    double l = 0.0;
    switch (type) {
      case ClusterType.byAuthor:
        l = (clusters.keys.contains(_unassignedKey)
                ? clusters.keys.length - 1
                : clusters.keys.length)
            .toDouble();
        break;
      case ClusterType.byAssignee:
      case ClusterType.byReviewer:
        l = (clusters.keys.contains(_unassignedKey)
                ? clusters.keys.length - 1
                : clusters.keys.length)
            .toDouble();
        break;
      case ClusterType.byMilestone:
        l = (clusters.keys.contains(_noMilestoneKey)
                ? clusters.keys.length - 1
                : clusters.keys.length)
            .toDouble();
        break;
      case ClusterType.byLabel:
        l = (clusters.keys.contains(_unlabeledKey)
                ? (clusters.keys.length - 1)
                : clusters.keys.length)
            .toDouble();
        break;
    }
    clusters.keys.forEach((key) =>
        sum += ((clusters[key].length - m) * (clusters[key].length - m)));

    double deviation = sum / l;

    return sqrt(deviation);
  }