Hi!

Please use the mailing list for questions about TBNL.

On Wed, 5 Jul 2006 22:55:08 -0500, Cameron Desautels cam@apt2324.com wrote:

I have a quick question about TBNL that I am hoping you wouldn't mind helping me with.

I'm a little surprised to see that TBNL does not contain a function which creates a dispatcher that matches an exact string (rather than a prefix or a regexp). Perhaps something like this?:

(defun create-static-dispatcher (str page-function) "A convenience function which will return a dispatch function which will return `page-function' whenever the path portion of the URI matches the string `str'." (lambda (request) (if (string= (script-name request) str) page-function)))

I'm somewhat curious what the reason for this omission is. Is it because the same functionality can be achieved with create-regex-dispatcher given a string with no wildcards? Certainly that method would be less efficient and isn't as (logically) clear. Am I missing something?

Your enlightening reply is appreciated.

I've never needed such a function, but as you demonstrate above it is trivial to build it yourself. I could add it to the next release if people feel that it's a worthwhile contribution.

Concerning your remark about efficiency: Do you really think that the speed difference between a regex scan and a string comparison (if there is one) would be noticable in a web application?

Cheers, Edi.