VBA copy values from one array and store them into another - arrays

Question

I am hoping to find help with this current VBA problem. I have looked throughout Stack Overflow and other Google searches, but can't seem to find what I'm looking for.
Essentially, I have a user pasted value on my page which I am delimiting on a comma, and then storing that into an array. What I am aiming to do is then loop through that array and eliminate any extra spaces, and then also delete any values that AREN'T a number.
Copy user values
Store into an array
Erase whitespace
So far, I have not been able to:
Copy items that ARE a number to new array
Currently, my code looks like:
Sub grabText()
' This macro was written as a test macro to grab and filter data entered in a textbox
Application.ScreenUpdating = False
Dim enteredValue As String ' Value taken from page
Dim vals() As String ' Array once it is split
Dim goodvals() As String 'Formatted array
Dim i As Integer 'Index
enteredValue = ActiveSheet.myTxt.Text
' MsgBox enteredValue
vals() = Split(enteredValue, ",")
lastitem = UBound(vals)
' MsgBox lastitem
'Formats array
For i = LBound(vals) To UBound(vals)
i = TRIM(vals(i))
'
' If (ISNUMBER(vals(i)) == TRUE) Then
' enter i into goodvals()
'
Next i
Application.ScreenUpdating = True
Any help or advice would be greatly appreciated. I was thinking about ways to do this in other languages (Java, Python) and I was thinking about Linked-Lists.
Thanks in advance!

Answer 1

Some issues:
Don't assign the result of Split to vals(), but to vals
Don't re-use the variable i for the result of the Trim. It is better to use a separate variable for that, which you can then type as a String
You can capture the desired result if you
First reserve enough room for your target array: it can never be longer than the Split result, so use that as the initial size
Use a separate index variable for referencing the target array index, and only increment it when you have stored a number in it
Finally reduce the size of the target array to the size that was actually used
Code:
Dim enteredValue As String ' Value taken from page
Dim vals() As String ' Array once it is split
Dim goodvals() As String 'Formatted array
Dim i As Long 'Index in vals
Dim j As Long 'Index in goodvals
Dim s As String 'Individual string
enteredValue = ActiveSheet.myTxt.Text
vals = Split(enteredValue, ",")
' Reserve as many entries in the target array
ReDim goodvals(UBound(vals))
j = LBound(goodvals)
For i = LBound(vals) To UBound(vals)
s = Trim(vals(i))
If IsNumeric(s) Then
goodvals(j) = CDbl(s)
MsgBox goodvals(j)
j = j + 1
End If
Next
' Shorten the array size to the part that is used
If j Then
ReDim Preserve goodvals(j - 1)
Else ' There were no numericals at all, so erase the array:
Erase goodvals
End If