So, any time I want to declare a local variable (inside a function for example), I use let form.
On Aug 26, 8:26 pm, nickikt <nick...@gmail.com> wrote: > Its for defining look variables (constants) that you use more then > once in your form and not have to write it more then once (or > calculated it more then once) > (let [r1 (random-int) > r2 (random-int)] > (when (the-same? r1 r2) > (str r1 " and " r2 " are the same")) > > Write this without let > > (when (the-same? (random-int) (random-int)) > (str (random-int) " and " (random-int) " are the same")) > > does this work? Of course not and thats one reason for let. > > Also it can make your code cleaner. > > (filter even? (take 10 (drop 10 (map inc (iterate inc 1))))) ;stuff > like this can get long > > (let [N-plus-one (map inc (iterate inc 1)) > my-range (take 10 (drop 10 N-plus-one))] > (filter even? my-range)) > > You can do destructoring in the binding block.http://clojure.org/special_forms > (search destructoring) > > Thats just some stuff, but as soon you have done some stuff yourself > it will become clear. > > On 26 Aug., 17:02, HB <hubaghd...@gmail.com> wrote: > > > > > Hey, > > Basically, I understand what let form does but I'm not sure when to > > use it. > > Would you please enlighten me about it? (if possible some typical Java > > code and then covert it to Clojure let form). > > I really appreciate your time and help. > > Thanks. -- 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
