如何对不同时间的数组进行排序？

Question

So I have an array of various timeslots, but I want to sort out the times from the earliest ones to the latest ones, however, I also want to delete any elements within the array that has the time value of 12:00am.

Appointment(0) = #10:45:00 AM#
Appointment(1) = #12:00:00 AM# 'My actual has up 80 elements of different timeslots but I'm using 3 elements as an example
Appointment(2) = #12:00:00 AM#

Is there anyone who can help me with this problem?

Answer 1

Using a string array is not a good idea if that's what you used just use a list of DateTime and the Sort method.

Dim list As List(of DateTime) = new List(of DateTime)
For Each val As String In Appointment
    list.Add(val.replace(" ",""))
Next
list.Sort(New Comparison(Of Date)(Function(x As Date, y As Date) y.CompareTo(x)))

Answer 2

Nothing in .Net for removing specific items from array, but it can be "simplified" a bit with LINQ:

Dim Appointment = {#10:45#, #12AM#, #12AM#}

Appointment = (From a In Appointment Where a <> #12AM# Order By a).ToArray

or

Appointment = Appointment.Except({#12AM#}).ToArray
Array.Sort(Appointment)

---

A bit more efficient alternative can be to use generic collection like List or SortedSet instead:

Dim list = New List(Of Date) From {#10:45#, #12AM#} ' or Dim list = Appointment.ToList
list.Add(#12AM#)

list.RemoveAll(Function(a) a = #12AM#)
list.Sort()