public static IEnumerable <double> PartialSums(this IEnumerable <double> self)
{
return(self.Accumulate(0.0, (x, y) => x + y));
}
public static IEnumerable <int> PartialSums(this IEnumerable <int> self)
{
return(self.Accumulate((x, y) => x + y));
}
/// <inheritdoc />
/// <summary>
/// Calculate multiplication of elements in collection.
/// </summary>
/// <param name="source">Input collection.</param>
/// <returns>Multiplication of elements in collection.</returns>
public BigInteger Multiply(
IEnumerable <int> source)
=> source.Accumulate(
(accumulator, value)
=> accumulator * value,
BigInteger.One);
public static IEnumerable <T> Accumulate <T>(this IEnumerable <T> self, Func <T, T, T> f)
{
return(self.Accumulate(default(T), f));
}
/// <inheritdoc />
/// <summary>
/// Calculate sum of elements in collection.
/// </summary>
/// <param name="source">Input collection.</param>
/// <returns>Sum of elements in collection.</returns>
public BigInteger Sum(
IEnumerable <int> source)
=> source.Accumulate(
(accumulator, value)
=> accumulator + value,
BigInteger.Zero);
