ИМ
Size: a a a
ИМ
x
RG
MS
A
ИМ
AR
A
ИМ
A
MS
O
ИМ
IV
??=
a ??= b; //присвоится если нулл
double SumNumbers(List<double[]> setsOfNumbers, int indexOfSetToSum)
{
return setsOfNumbers?[indexOfSetToSum]?.Sum() ?? double.NaN;
}
MS
double SumNumbers(List<double[]> setsOfNumbers, int indexOfSetToSum)
{
return setsOfNumbers?[indexOfSetToSum]?.Sum() ?? double.NaN;
}
MS
MS
A
RG
A