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Think about Loose Coupling

XML's author has A Perl Problem

by ibanix (Hermit)
on Mar 19, 2003 at 01:01 UTC ( #244203=perlmeditation: print w/replies, xml ) Need Help??

Update: Whoops! I guess this has already been covered in is XML too hard?

I wasn't sure if I should put this in Perl News or Meditations. I think it fits here better.

Tim Bray, XML Co-author, has a discussion here about problems he has with XML, namely the challenges programmers face in parsing XML.

Tim notes that he has problems parsing XML in Perl,
The reasons are not complicated: If I use any of the perl+XML machiner +y, it wants me either to let it read the whole thing and build a stru +cture in memory, or go to a callback interface. Since we're typically reading very large datasets, and typically looki +ng at the vast majority of it, preloading it into a data structure wo +uld be impractical not to say stupid. Thus we'd be forced to use pars +er callbacks of one kind or another, which is sufficiently non-idioma +tic and awkward that I'd rather just live in regexp-land.
You can read his Perl code, and the type of code he really wants to be able to write, here.

I've written a small program with XML::Simple, which does not begin to approach Tim's size. However, I thought the end result was elegant and flexible.

How does anyone else feel about this topic?


$ echo '$0 & $0 &' > foo; chmod a+x foo; foo;

Replies are listed 'Best First'.
Re: XML's author has A Perl Problem
by diotalevi (Canon) on Mar 19, 2003 at 04:50 UTC

    Where's the program?

      1. Think up a great idea for a program.
      2. Post on Perlmonks saying you've written it.
      3. Keep the code closed.
      4. ???
      5. Profit!
It seems to be a problem for programmers from Antarctica
by zby (Vicar) on Mar 19, 2003 at 10:27 UTC
    I was a bit suprised that there are any.

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