On Monday, February 18, 2013 5:40:51 PM UTC+1, vemv wrote: > > And neither can be solved by adding a lambda: > > (-> [[1 1 1] 2 3] (nth 0) #(map inc %)) ;; fail >
Lambda does solve it, you are just missing the parens around the lambda: (-> [[1 1 1] 2 3] (nth 0) (#(map inc %))) > Clojure 1.5's as->, though, can come to the rescue. > > (-> [[1 1 1] 2 3] (nth 0) (as-> x (map inc x))) ;; cool > > Now, I only wish 1.5 came with as->> macro! Its implemetation is trivial > anyway. > > (->> [1 2 3] (as->> _ (nth _ 0))) > > Of course, for the given examples, using these "as" forms is overkill. But > if you've ever ended up writing large expressions (especially when > experimenting) which arbitrarily nest/interleave ->> and ->, using as-> and > as->> can provide a more sequential, structured alternative. > > Couldn't find any related discussion about the uses of as->, as its name > is unfriendly to Google/JIRA searches. Thoughts? > as-> is actually a generalization of both -> and ->>: you get to choose where to involve the previous result in each form. That is why as->> would be redundant. -Marko -- -- 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.
