What is the major benefit of as-> => (-> 4 (#(* % %)) (+ 12) )
28 => (-> 4 (as-> y (* y y)) (+ 12)) 28 On Monday, August 19, 2013 9:13:36 AM UTC-7, Ben Mabey wrote: > > On 8/19/13 8:58 AM, Jay Fields wrote: > > In the past, I've written code like the following > > > > (defn foo [x y] > > (let [x-squared (* x x)] > > (if (pos? y) > > (+ x-squared y) > > (- x-squared y)))) > > > > However, the introduction of as-> has led me to write the following, at > times > > > > (defn foo [x y] > > (as-> (* x x) x-squared > > (if (pos? y) > > (+ x-squared y) > > (- x-squared y)))) > > > > In essence, I've started replacing single binding lets with as->. John > > Hume has pointed out that as-> seems to have been introduced to work > > in conjunction with ->. Which brings me to my question - do you think > > it's better to use a single binding let from a readability > > perspective? Are there any (performance or otherwise) impacts that I > > should be aware of? > > > > Cheers, Jay > > > I prefer the standard `let` in these cases for readability since `as->`, > to me, implies some threading is going on. I only use `as->` when I'm > already using `->` as it saves me an extra binding that breaks up the > flow of the code. WRT performance, the only difference with the `as->` > version is an extra rebinding of `x-squared` as this expansion shows: > > (clojure.core/let [x-squared (* x x) > x-squared (if (pos? y) > (+ x-squared y) > (- x-squared y))] > x-squared) > > > -Ben > > -- -- 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.
