随机选择一个数组元素

Question

So I'm trying to select a random element and then save said element, not quite knowing as to how I would go about doing this. The first thing that came to mind, although messy to write was:

Rnd(griddata(1), griddata(2), griddata(...))

I did receive an error however from this:

Overload resolution failed because no accessible 'Rnd' accepts this number of arguments.

The plan is to store whatever random element it chooses as memory as well.

Any help would be greatly appreciated. Thanks!

Answer 1

    Dim myArray() As Integer = {1, 10, 12, 11, 44, 23, 2, 1, 5, 6, 2, 7}
    Dim rnd As New Random
    Dim randomArrayElement = myArray(rnd.Next(0, myArray.Length - 1))

Or even you can try the same from a string also

    Dim chars = "0123456789"
    Dim random = New Random()
    Dim result = New String(Enumerable.Repeat(chars, 1).[Select](Function(s) s(randomOtp.[Next](s.Length))).ToArray())

Answer 2

Dim rnd = new Random()
...
Dim randomIndex = rnd.Next(0, griddata.Length)
Dim randomValue = griddata(randomIndex)

This is assuming that your array is 0-based (as .NET arrays usually are).