« Return to Thread: Simple matching question

Re: Simple matching question

by Daniel Sobral :: Rate this Message:

Funny that I don't see Cees original message.

Anyway, "startsWith" is a method of both String and RichString, so I'm not sure how you weren't able to find it. A general matcher can be built like this:

class prefixMatcher(prefix: String) {

def unapply(s: String): Boolean =

s.startsWith(prefix)

}

val multipartMatcher = new prefixMatcher("multipart/")

for(contentType <- List("multipart/mixed", "application/soa")) contentType match {

case multipart @ multipartMatcher() => println("Found multipart: "+multipart)

case _ =>

}

Please note that the parenthesis after multipartMatcher are required inside the case statement.

On a totally unrelated note, I'm impressed how often the answer to a Scala question can be usable code without turning it into a dissertation!

On Fri, Jul 3, 2009 at 5:18 PM, Randall R Schulz <rschulz@...> wrote:

On Friday July 3 2009, Cees de Groot wrote:
> Hi,
>
> I'm writing some code to interpret MIME mails, and one of the things
> I want to do is create a matcher if the content-type says
> "multipart/* <garbage>" (multipart/alternative, multipart/mixed,
> multipart/related). I've scanned the Scala book up and down and
> (blame me) can't find a simple way to match on the beginning of a
> string save for the 'm','u','l',... Seq[Char] matching. Isn't there a
> simpler way?

Unless I'm misunderstanding you, a regular expression match is a good
fit for this sort of problem.

> TIA,
>
> Cees

Randall Schulz

--
Daniel C. Sobral

Something I learned in academia: there are three kinds of academic reviews: review by name, review by reference and review by value.

« Return to Thread: Simple matching question