gistfile1.txt

ジェネリックメソッドの戻り値を T? と書けないC#8.0かっこ悪い

#nullable disable
public static T elementOrNull<T>(this List<T> list, Int32 index) {
    try {
        return list[ index ];
    } catch (IndexOutOfRangeException) {
        return default;
    }
}
public static T firstOrNull<T>(this List<T> list) => elementOrNull( list, 0 );
public static T lastOrNull<T>(this List<T> list) => elementOrNull( list, list.Count-1 );
#nullable enable