static double length(ObjectToCounterMap<String> otc) {
double sum = 0.0;
for (Counter counter : otc.values()) {
double count = counter.doubleValue();
sum += count; // tf =sqrt(count); sum += tf * tf
}
return Math.sqrt(sum);
}
static double length(ObjectToCounterMap<String> otc) {
double sum = 0.0;
for (Counter counter : otc.values()) {
double count = counter.doubleValue();
sum += count; // tf =sqrt(count); sum += tf * tf
}
return Math.sqrt(sum);
}