My request is one that can extract a number somewhat by a search.
Example:
animalsOwned|4 would return an containing "4"
animals|3|2|1|3 would return an array containing "3", "2", "1", "3"
This would make it easier for me during a file stream reader. Thank you
Dim astring = "ABCDE|1|2|3|4"
Dim numbers = (From s In astring
Where Char.IsDigit(s)
Select Int32.Parse(s)).ToArray()
This LINQ statement should help. It simply checks each character in a string to see if it's a digit. Note that this only applies to single digit numbers. It becomes a bit more complicated if you want "ABC123" to return 123 vs. 1, 2, 3 array.
Try regular expression. It's a powerful tool for simple text parsing.
Imports System.Text.RegularExpressions
Namespace Demo
Class Program
Shared Function Main(ByVal args As String()) As Integer
Dim array As Integer() = ExtractIntegers("animals|3|2|1|3")
For Each i In array
Console.WriteLine(i)
Next
Return 0
End Function
Shared Function ExtractIntegers(ByVal input As String) As Integer()
Dim pattern As String = "animals(\|(?<number>[0-9]+))*"
Dim match As Match = Regex.Match(input, pattern)
Dim list As New List(Of Integer)
If match.Success Then
For Each capture As Capture In match.Groups("number").Captures
list.Add(Integer.Parse(capture.Value))
Next
End If
Return list.ToArray()
End Function
End Class
End Namespace
I haven't programmed VB for awhile but I'll give you some pseudo code: First, loop through each line of file. Call this variable Line. Then, take the index of what you're searching for: like Line.indexOf("animalsOwned") If it returns -1 it isn't there; continue. Once you find it, add the Index variable to the length of the search string and 1. (Index=Index+1+Len(searchString)) Then, take a substring starting there, and end at the end of the line. Explode the substring by | characters, then add each into an array. Return the array.
Sorry that I can't give you much help, but I'm working on an important PHP website right now ;).
You can do a variable.Split("|") and then assign each piece to an array level.
You can do a count on string and with a while or for loop, you can assign the splited sections to array levels. Then you can do a IsNumeric() check for each array level.
