I have a string of format:
"one two 33 three"
I need to split it on the numeric value so that I get an array of length 2:
"one two"
"33 three"
or an array of length 3:
"one two"
"33"
"three"
I tried Regex.Split(str,"\D+") but it gave me:
""
"33"
""
and Regex.Split(str,"\d+") gave me:
"one two"
"three"
and Regex.Split(str,"\d") gave me:
"one two"
""
"three"
So none gave me the desired result. Can anyone help?
(?=\b\d+\b)
Split on this regex.
This uses a positive lookahead to check if at the point of split there is an integer separated by word boundary.See demo.
https://regex101.com/r/wV5tP1/5
EDIT:
If you wanna remove the space too use
(?=\d+\b)
See demo.
twoUse a lookahead in your regex like,
Regex.Split(str," (?=\d+)")
(?=\d+) Positive lookahead asserts that the match must be followed by a number. So the above regex would match the space which exists just before to the number. Splitting according to the matched space will give you "one two" "33 three" as result.
Dim input As String = "one two 33 three"
Dim pattern As String = " (?=\d+)"
Dim substrings() As String = Regex.Split(input, pattern)
For Each match As String In substrings
Console.WriteLine("'{0}'", match)
Next
Output:
'one two'
'33 three'
To get an array of length 3.
Public Sub Main()
Dim input As String = "one two 33 three"
Dim pattern As String = " (?=\d+)|(?<=\b\d+) "
Dim substrings() As String = Regex.Split(input, pattern)
For Each match As String In substrings
Console.WriteLine("'{0}'", match)
Output:
'one two'
'33'
'three'