I actually wish this was how the if-let macro in core worked. Once in a blue moon I end up writing nested if-let statements or an if-let with a nested let. Both of these cases look so ridiculous I often re-write the the code just avoid it.
On Tuesday, June 9, 2015 at 2:00:53 PM UTC+2, crocket wrote: > > It evaluates true-case only if every local binding evaluates to true values. > false-case has no access to local bindings. > > (defmacro if-let-all > "if-let-all evaluates every local binding sequentially and evaluates > true-case only if every local binding is a truthy value. > true-case has access to all local bindings, but false-case doesn't have > access to local bindings." > [bindings true-case false-case] > (let [pairs (partition 2 bindings) > names (mapv first pairs) > exprs (map second pairs) > exprs-in-if-let (fn self [[name1 & more-names] [expr1 & more-exprs]] > `(if-let [~name1 ~expr1] > ~(if more-names > (self more-names more-exprs) > names))) > things (exprs-in-if-let names exprs)] > `(if-let [~names ~things] > ~true-case > ~false-case))) > > I think this macro could benefit people if I found the right project where it > should reside. > Can anyone help me find the right project for if-let-all? > > -- 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/d/optout.
