I have strings that follow the format "x Packs of y" so for example "15 packs of 5", "1 pack of 10" and so on.
I would like to use a regex that looks for "x Packs of y" and puts x in one variable and y in a second variable.
Please can somebody advise how I do this?
Try this...
Dim foo = "15 packs of 5"
Dim match = Regex.Match(foo, "(\d+) packs? of (\d+)", RegexOptions.IgnoreCase)
Dim x = match.Groups(1).Value
Dim y = match.Groups(2).Value
Console.WriteLine("x = " & x)
Console.WriteLine("y = " & y)
Update: Thanks Braj for pointing out the pack/packs.
In .NET, for ASCII Digits, use [0-9], not \d
In .NET, \d matches digits in any script, including Thai and Klingon. Assuming you only want ASCII digits 0 through 9 rather than 654۳۲١८৮੪૯୫୬१७੩௮, use this:
Dim firstNumber As String
Dim secondNumber As String
Dim RegexObj As New Regex("([0-9]+) packs? of ([0-9]+)", RegexOptions.IgnoreCase)
firstNumber = RegexObj.Match(yourString).Groups(1).Value
secondNumber = RegexObj.Match(yourString).Groups(2).Value
Explanation
RegexOptions.IgnoreCase makes it case-insensitive([0-9]+) captures one or more digits to Group 1packs? matches pack with an optional s([0-9]+) captures one or more digits to Group 2
Get the matched group from index 1 and 2
(\d+) packs? of (\d+)
String literals for use in programs: C# (ignore case is also added)
@"(?i)(\d+) packs? of (\d+)"
Read more about Ignore case and Regex.Match
\d pack of \d.. why is there a ?
? means 0 or 1.
packs and pack as well