sort string array due to DayOfWeek

Question

I have an string array

string[] days={ "1", "2", "6" }

I want to sort it according to DayOfWeek increasingly. For example "1" is Monday, "2" is Tuesday,"6"is saturday. Today is Thursday. So nearest one is Saturday,Monday,Tuesday. So final array will be

days={ "6", "1", "2" }

I couln't find any solution to sort them . How can I sort them.

Thanks in advance.

Answer 1

String is a bit complex to explain, so I use int instead.

Let the day-of-week always not smaller than today, then compare.

int[] days = { 1, 2, 6 };
int today;
Array.Sort(days, (d1, d2) =>
{
    if(d1 < today)
       d1 += 7;
    if(d2 < today)
       d2 += 7;
    return d1.CompareTo(d2);
});

---

Short form

Array.Sort(days, (d1, d2) => (d1 < today ? d1 + 7 : d1).CompareTo(d2 < today ? d2 + 7 : d2));

https://dotnetfiddle.net/QsVnIr