On Wed, Feb 24, 2010 at 8:09 PM, James Sofra <james.so...@gmail.com> wrote: > Hi all, > > I am trying to use (abuse? *) zip-filter to remove some nodes and > return the xml tree to me. > If I do something like this: > (xml1-> zipped-xml zf/descendants :model zip/remove zip/root) > > I can remove one :model node, but what if I want to remove more than > one or all of the :model nodes? > > If I do this: > (xml-> zipped-xml zf/descendants :model zip/remove zip/root) > > I get multiple xml-trees each with one node removed from each. So I > wrote a function "zip-top" to take me back to the top (like zip/root > but returns the loc not node) and can do this: > (xml-> zipped-xml zf/descendants :model zip/remove zip-top zf/ > descendants :model zip/remove zip/root) > > and that will remove two of them but that is not really ideal I would > like to remove all of them ... any ideas? am I way off track? is there > better ways to manipulate xml trees in clojure? Enlive maybe? I > haven't played with it yet. > > * I realise this probably abusing zip-filter since it is only supposed > to take predicates and zip/remove is not really a predicate.
You have correctly identified the behavior of zip-filter and its negative consequences. I didn't realize until too late that my design for zip-filter essentially prevents using it to edit more than a single filter result. I haven't thought deeply about what could be done to fix it -- I think it would have to be pretty radical. Instead of returning a lazy seq it would have to have some kind of mechanism for continuation, or perhaps using a monad or one of these new cells. Christophe Grand's "enlive" lib address a lot of these problems for html and some xml. I'd recommend you take a look at it and see if it would work in your case. --Chouser http://joyofclojure.com/ -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
