> (fz-node-seq x) is just (tree-seq coll? seq x)
Good Point! I had never noticed the parallels between tree-seq and zippers, but it's obvious when you point it out. Thanks for mentioning that. > (personally I don't have enough experience to be comfortable with > them), yeah, i haven't found a great use case for zippers yet either. but lately I've been experimenting with using them to write more readable code transforms. hence the need for form-zip. Like clojure.walk, but with the ability to backtrack. > fz-node-seq doesn't seem useful. Ouch! Ok, here's one that is. As you astutely noted above, fz-node-seq is functionally equivalent to (tree-seq coll? seq x), but what's interesting about it is, it is implemented like so: (map zip/node (fz-loc-seq form)) What's "useful" there is the call to fz-loc-seq which provides a seq of every zipper loc in the form. Useful again for code transforms, I think. Thanks again for exercising my brain cells. I haven't forgotten that beer I owe you. On Nov 8, 8:06 pm, Alan Malloy <[email protected]> wrote: > (fz-node-seq x) is just (tree-seq coll? seq x) then, yeah? I could see > form-zip being useful for people who like zippers (personally I don't > have enough experience to be comfortable with them), but fz-node-seq > doesn't seem useful. > > On Nov 1, 8:56 pm, George Jahad <[email protected]> wrote: > > > surely this one's been written before, but i needed it the other day > > and couldn't find it. > > > form-zip returns a zipper from a clojure form. > > > user=> (require '[clojure.zip :as zip]) > > user=> (use 'form-zip.core) > > user=> (-> '{1 2 3 4} form-zip zip/next zip/remove zip/root) > > {3 4} > > > fz-node-seq returns a seq of the nodes. > > > user=> (fz-node-seq '{1 2 3 4}) > > ({1 2, 3 4} [1 2] 1 2 [3 4] 3 4) > > > a one hour hack, probably full of edge cases i haven't thought of. > > > on clojars and github:https://github.com/GeorgeJahad/form-zip > > -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to [email protected] Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/clojure?hl=en
