On Fri, Nov 30, 2012 at 10:15 AM, Alex Baranosky <alexander.barano...@gmail.com> wrote: > I've got a utility function I've been using called `conditionally-transform` > which is a non-macro version of `test->`.
Likewise, except with use a HOF called "conditionalize": (defn conditionalize "When called with a function f, returns a function that returns its arguments if they arguments do not satisfy pred, or the result of the application of f to its arguments otherwise." [pred f] (fn [& args] (if (apply pred args) (apply f args) (apply identity args)))) Jay's example would then be (-> x ((conditionalize number? str)) (conditionalize string? count))), which tbh I like more because (a) it doesn't introduce a new macro that can only be used in one syntactic position (and there are other cases where you'd want to be able to pass these transformed functions around) and (b) it groups the transformations syntactically with their tests. -- Ben Wolfson "Human kind has used its intelligence to vary the flavour of drinks, which may be sweet, aromatic, fermented or spirit-based. ... Family and social life also offer numerous other occasions to consume drinks for pleasure." [Larousse, "Drink" entry] -- 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
