With classic pattern matching, you can't. I suggest you to use .NET Regexp library and active patterns. You should read this paper about active patterns: [link:blogs.msdn.com]
One solution is:
1 2 3 4 5 6 7 8 9 10 11 12
open System.Text.RegularExpressions let (|ParseRegex|_|) re s = if Regex(re).Match(s).Success then Some() else None let urlFilter2 url agent = match url,agent with | ParseRegex "http://" (), _ -> true | _ -> false
- Laurent LB
Thank you for the reply :) Very interesting article.
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Hi there
How do you pattern match for a part of a string?
let urlFilter2 url agent =
match url,agent with
| "[link:www.control.org",] _ -> true
, for example, lets say i wanted to change the above code to making it check whether url starts with "http"
instead.
- Fredrik