Method LastOrNone

Namespace

SodaFlow.Functional

Assembly

SodaFlow.Functional.dll

LastOrNone<T>(IEnumerable<T>?)

Returns the last element of a sequence, if it has one.

[Pure]
public static Maybe<T> LastOrNone<T>(this IEnumerable<T>? source)

Parameters

source IEnumerable<T>

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

Returns

Maybe<T>

A Maybe<T> containing the last element, and one containing no value if the sequence is empty.

Type Parameters

T

The type of the values in the sequence.

Remarks

This code indexes a sequence that permits an index. It enumerates each other sequence to the end to find out what the last element was.

LastOrNone<T>(IEnumerable<T>?, Func<T, bool>)

Returns the last element of a sequence which satisfies a predicate, if there is one.

[Pure]
public static Maybe<T> LastOrNone<T>(this IEnumerable<T>? source, Func<T, bool> predicate)

Parameters

source IEnumerable<T>

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

predicate Func<T, bool>

The condition the element must satisfy.

Returns

Maybe<T>

A Maybe<T> containing the last matching element, and one containing no value if there is none.

Type Parameters

T

The type of the values in the sequence.