operator [] method

Column<Comparable, Comparable> operator [](
  1. String key
)

Implementation

Column operator [](String key) {
  if (numericColumns.containsKey(key)) {
    return numericColumns[key]!;
  }
  if (categoricColumns.containsKey(key)) {
    return categoricColumns[key]!;
  }
  throw PackhorseError.badArgument("Data frame has no column '$key'.");
}