Yesterday, I spent hours trying to figure out why some code didn't work. The code is like so: (defn replace-symbol-in-ast-node [old new ast] (tree-replace (symbol old) (symbol new) ast))
I use tree-replace directly like this: (ast/tree-replace (symbol 'a) (symbol 'c) (ast/sexp->parsley '(+ a b))) I thought the result would the the same but I was wrong. After hours of thinking, I finally figured it out. Guess what? The 'symbol' function in the first code snippet is not the standard 'symbol'. It actually is: (defn symbol [sym] (make-node :atom (core/vector (name sym)))) It's defined in another library. But I stupidly thought it was the standard 'symbol'. Part of this was my fault, I guess. I shouldn't have taken it for granted and guessed its meaning. But who know? In my opinion if we use less :use, it would easier for others to read our code and less likely to misunderstand the meaning, or at least *Do Not Use *those standard names*.* On Wednesday, July 24, 2013 1:50:50 AM UTC+10, Greg wrote: > > I think I read somewhere that :use is no longer encouraged, but I could be > mistaken. > > From what I've read, it seems like most people agree that Clojure has too > many ways of including/importing/referencing/requiring/using things: > > > http://blog.8thlight.com/colin-jones/2010/12/05/clojure-libs-and-namespaces-require-use-import-and-ns.html > > > The above gives a very nice explanation of all the various difference, but > it also acknowledges their complexity. > > Since :use uses :require, and since :require can do everything that :use > can, can we simplify Clojure programming a bit for newcomers by deprecating > the use of :use? The situation in ClojureScript is even worse because it > adds :require-macros on top of all the other ways of including files. > > Ideally, it would be awesome if there was just a single directive for > everything, but perhaps there's some complicated low-level reason why > that's not possible. :-\ > > Thoughts? > > Thanks, > Greg > > P.S. If this has already been brought up you have my sincere apologies. > > -- > Please do not email me anything that you are not comfortable also sharing > with the NSA. > > -- -- 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 --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
