average property
num
average
Returns the average (mean) of all values in this
.
this
is only enumerated once.
Implementation
num get average {
var count = 0;
num runningSum = 0;
for (var value in this) {
count++;
runningSum += value;
}
if (count == 0) {
throw ArgumentError(
'Cannot calculate the average of an empty collection.',
);
}
return runningSum / count;
}