average method
Implementation
double? average(){
List<double> a = [0.0,0.0];
var r = reduce<List<double>>(a, (t, u) {
return [t[0]+1,t[1]+u];
});
if(r[0]==0) return null;
else return r[1]/r[0];
}
double? average(){
List<double> a = [0.0,0.0];
var r = reduce<List<double>>(a, (t, u) {
return [t[0]+1,t[1]+u];
});
if(r[0]==0) return null;
else return r[1]/r[0];
}