Method AggregateOrNone

Namespace

SodaFlow.Functional

Assembly

SodaFlow.Functional.dll

AggregateOrNone<T>(IEnumerable<T>?, Func<T, T, T>)

Combines the elements of a sequence with a function, if it has any.

[Pure]
public static Maybe<T> AggregateOrNone<T>(this IEnumerable<T>? source, Func<T, T, T> f)

Parameters

source IEnumerable<T>

The sequence to fold. A null sequence counts as empty.

f Func<T, T, T>

Applied to the result so far and the next element, starting with the first two elements.

Returns

Maybe<T>

A Maybe<T> containing the combined value, the single element if there was only one, and no value if the sequence was empty.

Type Parameters

T

The type of the values in the sequence.

Remarks

The seedless Aggregate<TSource>(IEnumerable<TSource>, Func<TSource, TSource, TSource>) , which throws on an empty sequence because it has nothing to return. There is no such problem when the answer can say there was nothing to put together. Where a seed exists, Aggregate<TSource, TAccumulate>(IEnumerable<TSource>, TAccumulate, Func<TAccumulate, TSource, TAccumulate>) is total and is the one to use.