Comments on: XML prettifier in Haskell

By: endrew

endrew — Wed, 15 Jul 2009 13:50:47 +0000

Aha! I knew there was something to it

By: Andreas Krey

Andreas Krey — Wed, 15 Jul 2009 09:56:22 +0000

And, of course, you technically can't pretty-print XML, because all the whitespace is significant. Except for within the tags.

By: Magnus

Magnus — Wed, 15 Jul 2009 08:12:54 +0000

@endrew & David, every time I use getArgs I forget it doesn’t include argv[0] so I always start out with liftM (!! 1) and when reminded (through a run-time exception) I put in the zero. Of course I could always us (_:fn), but pattern matching in do (or let) still doesn’t come naturally for me.

By: David

David — Wed, 15 Jul 2009 01:01:38 +0000

For your first line in main, I recommend:

main = do [fn] <- getArgs ...

By: endrew

endrew — Tue, 14 Jul 2009 18:09:38 +0000

I'm really just a noob, but what's the point of using (!! 0) instead of head?

By: Magnus

Magnus — Tue, 14 Jul 2009 15:56:58 +0000

@Gutkovas, what's the fun in that? Kidding aside, I didn't know xmllint did that, thanks for pointing it out.

@ephemient, yes, that's what I've often done, but as you point out, it's not always reliable.

By: ephemient

ephemient — Tue, 14 Jul 2009 15:48:52 +0000

As cool as that is, what about Vim's "gg=G"? It sometimes gets confused by what the proper indentation should be around comments, but aside from that, it's pretty good.

By: Ram?nas Gutkovas

Ram?nas Gutkovas — Tue, 14 Jul 2009 15:13:10 +0000

There is an utility command "xmllint" which comes with "libxml2-utils" package on Ubuntu.

xmllint --format cluttered.xml > prettified.xml