FruityFoundation/Base/Structures/MaybeExtensions.cs

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C#
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using System;
using System.Collections.Generic;
namespace FruityFoundation.Base.Structures;
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public static class MaybeExtensions
{
public static Maybe<T> FirstOrEmpty<T>(this IEnumerable<T> collection)
{
using var enumerator = collection.GetEnumerator();
return !enumerator.MoveNext() ? Maybe<T>.Empty() : enumerator.Current;
}
public static Maybe<T> FirstOrEmpty<T>(this IEnumerable<T> collection, Func<T, bool> pred)
{
foreach (var item in collection)
if (pred(item))
return item;
return Maybe<T>.Empty();
}
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public static T? ToNullable<T>(this Maybe<T> item) where T : struct =>
item.HasValue ? item.Value : null;
}