iOS Question Regex gives different result in B4I to B4A

[tsteward]

In B4A this routine returns True but in B4I it returns False
Should return true (and does in B4A) for any number entered between 1 and 8100

'reg = ^([1-9])|([1-9][0-9])|([1-9][0-9][0-9])|([1-7][0-9][0-9][0-9])|([8][0][0-9][0-9])|([8][1][0][0])$
'txt = "3221"
Sub isValid(reg As String, txt As String) As Boolean
    If reg = "" Then
        Return True
    End If
    Return Regex.IsMatch(reg,txt)
End Sub

 

[Erel]

Force the anchors to apply to all options:

Dim pattern As String = "^(([1-9])|([1-9][0-9])|([1-9][0-9][0-9])|([1-7][0-9][0-9][0-9])|([8][0][0-9][0-9])|([8][1][0][0]))$"
Log(Regex.IsMatch(pattern, "3321"))