While Forever

[alexispurslane]

In the Wisp console, this code goes on forever:

(def i 0)
(while (< i 10)
    (.log console i)
    (set! i (+ i 1)))

I have tried it in the equivalent JavaScript in the Chrome Console and it worked fine! I otherwise LOVE the idea of Wisp, and will probably use it! I installed wisp using npm install -g wisp and started the repl using wisp. I am on a mac 13in retina 2013 running mavericks...

[Gozala]

I'm surprised it actually does compile into something runnable o_0. Anyway there is no while forms in wisp, in fact while here is assumed to be a function. If you paste your code into http://jeditoolkit.com/try-wisp/ you'll see output:

var i = exports.i = 0;
while(i < 10, console.log(i), i = i + 1);

I'm guess it turns out to be a vaid JS, although wisp just thinks of it as invocation of function named while with arguments (i < 10), (.log console i) and (set! i (+ i 1)))

Anyhow plain while loops & mutations isn't idiomatic way to write code in clojure(script) and inherently in wisp. This kind of loop would be expressed as follows:

(loop [i 0]
  (if (> i 9)
    (do
      (print i)
      (recur (+ i 1)))))

Note: Current compilation output isn't all that pretty I'm afraid although I do have plans on making a lot better.

[markjreed]

Since Clojure has a while, it seems wisp should as well... although the code above needs a (do ...) wrapped around the body to be valid Clojure.

On Sun, Mar 16, 2014 at 1:29 AM, Irakli Gozalishvili < notifications@github.com> wrote:

I'm surprised it actually does compile into something runnable o_0. Anyway there is no while forms in wisp, in fact while here is assumed to be a function. If you paste your code into http://jeditoolkit.com/try-wisp/you'll see output:

var i = exports.i = 0;while(i < 10, console.log(i), i = i + 1);

I'm guess it turns out to be a vaid JS, although wisp just thinks of it as invocation of function named while with arguments (i < 10), (.log console i) and (set! i (+ i 1)))

Anyhow plain while loops & mutations isn't idiomatic way to write code in clojure(script) and inherently in wisp. This kind of loop would be expressed as follows:

(loop [i 0](if %28> i 9%29 %28do %28print i%29 %28recur %28+ i 1%29%29%29))

Note: Current compilation output isn't all that pretty I'm afraid although I do have plans on making a lot better.

— Reply to this email directly or view it on GitHubhttps://github.com/Gozala/wisp/issues/86#issuecomment-37749347 .

Mark J. Reed markjreed@gmail.com

[Gozala]

It's unlikely while form will end up in wisp, although there is some effort being made to raise compile time warnings when attempting to forms not known to a compiler rather than trying to treat everything as a function call (see #93)