Clojure Distilled

Post by mendort » Sat, Sep 27, 2014, 1:01 PM UTC

craigching wrote: post #41

mendort wrote: post #28

Earlier quoted context omitted.

I also am a long time emacs user, but whenever a plugin freezes emacs I immediately stop using it. Is is cider now stable? I know nrepl.el would crash emacs frequently if you asked it to evaluate the wrong thing.

I've never had cider or the old nrepl.el crash or freeze on me, they've always worked fine. I develop on Mac OSX and Linux, what platform are you on? And what Emacs version? I tend to be on the latest GNU releases. Are you using a GNU Emacs or something else? If you're on Mac, I highly recommend this distribution [1] [1] -- http://emacsformacosx.com

Post by malisper » Sat, Sep 27, 2014, 3:17 PM UTC

zeroyzeroa wrote: post #35

Extracting keys from maps into a definition, with common-lisp (using my macro defk) (defk login (user pass) (and (string= user "Bob") (string= pass "secret"))) (login (list-to-hash '(user "Bob" pass "secret")) (list-to-hash '(user "Bob" pass "secret")) Given the following definitions: (defmacro defk(name h-list &rest body) `(defun ,name (h) (let ,h-list ,@(loop for k in h-list collect `(setq ,k (gethash (quote ,k) h)…

  (defmacro with-keys (keys table &body body)
    (let ((gtable (gensym)))
      `(let ((,gtable ,table))
         (symbol-macrolet ,(loop for k in keys
                                 collect `(,k (gethash ',k ,gtable)))
           ,@body))))

  CL-USER> (defparameter *table* (make-hash-table))
  *TABLE*
  CL-USER> (setf (gethash 'a *table*) 10
                 (gethash 'b *table*) 20)
  20
  CL-USER> (with-keys (a b) *table*
             (list a b))
  (10 20)
  CL-USER> (with-keys (a b) *table*
             (setf a 100
                   b 200))
  200
  CL-USER> (list (gethash 'a *table*)
                 (gethash 'b *table*))
  (100 200)

Post by AlexeyBrin » Sat, Sep 27, 2014, 3:20 PM UTC

dschiptsov wrote: post #30

I am really suggesting to try some classic Scheme course first, like my favorite CS61A by Brian Harvey, or that wonderful Racket-based course (what's the difference?) on Coursera by Gregor Kiczales (which is worth watching even if you are mere a brainwashed Java dev). Another way is through pg's books, especially, of course, "On Lisp" and Arc tutorial and then arc.arc (original version from the 2009 arc3.tar which is…

    which is worth watching even if you are mere a brainwashed Java dev

Post by yogthos » Sat, Sep 27, 2014, 3:37 PM UTC

arms wrote: post #14

arms wrote: post #9

I'm currently learning Clojure. For all the "aha!" moments, there are plenty of "WTFs?", too. Not that it's a fault of the language, it's just that it requires a different way of looking at things. I've only skimmed this article, but look forward to reading it in depth later. Thanks! I'd be interested if anyone has some similar pieces to share.

So I'm about half way through it now. I'm really impressed with how much information it's conveying in a succinct form. I'm going through Clojure for the Brave and True, and think this supplements it nicely. There are a few typos, but the most glaring one was the incomplete python code underneath the "Code Structure" heading: l = [1, 2, 3, 4, 5] for i in l i = i*i for i in l if (i mod 2 == 0) print l I assume the aut…

Post by bwanab » Sat, Sep 27, 2014, 4:22 PM UTC

mendort wrote: post #28

craigching wrote: post #23

Earlier quoted context omitted.

I will say that cider has done a very nice job of getting interactive development using Emacs to work well. I am a 20+ year Emacs user and love working with Clojure via cider. I will say that I think getting started with Light Table is a great way to start, but don't leave Emacs too far behind! Good luck go you!

I also am a long time emacs user, but whenever a plugin freezes emacs I immediately stop using it. Is is cider now stable? I know nrepl.el would crash emacs frequently if you asked it to evaluate the wrong thing.