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Factorial in LISP

Name: Anonymous 2011-02-05 13:59


factorial 1->1; n->n*(factorial n-1)


compare to Haskell

factorial::Integer->Integer
factorial 0=1
factorial n=n*factorial(n-1)

Name: Anonymous 2011-02-05 14:00

``in Lisp''.

Name: Anonymous 2011-02-05 14:02

>>2
sorry :-(

Name: Anonymous 2011-02-05 14:07

(fun x) is superior to fun(x)

Name: Anonymous 2011-02-05 15:21

>>1
theres somethin rong w/ ur lambda caluclus but i ftfy :)

(λ(lambda)(((((((λ(lambda)(λ(λλ)(λ(λλλ)(λ(λambda)(λ(λαμβδα)(λ(λ)(if(λambda λαμβδα)λ((((((lambda lambda)λλ)λλλ)λambda)(λλλ λαμβδα))(λλ λαμβδα λ)))))))))(λ(lambda)(λ(λλ)(λ(λλλ)(λ(λambda)(λ(λαμβδα)(λ(λ)(if(λambda λαμβδα)λ((((((lambda lambda)λλ)λλλ)λambda)(λλλ λαμβδα))(λλ λαμβδα λ))))))))))(λ(lambda λαμβδα)(((((((λ(lambda)(λ(λλ)(λ(λλλ)(λ(λambda)(λ(λλλλ)(λ(λ)(if(λλ λλλλ)λ((((((lambda lambda)λλ)λλλ)λambda)(λλλ λλλλ))(λambda λ λαμβδα)))))))))(λ(lambda)(λ(λλ)(λ(λλλ)(λ(λambda)(λ(λλλλ)(λ(λ)(if(λλ λλλλ)λ((((((lambda lambda)λλ)λλλ)λambda)(λλλ λλλλ))(λambda λ λαμβδα))))))))))zero?)sub1)(λ(lambda λαμβδα)(((((((λ(lambda)(λ(λλ)(λ(λλλ)(λ(λambda)(λ(λλλλ)(λ(λ)(if(λλ λλλλ)λ((((((lambda lambda)λλ)λλλ)λambda)(λλλ λλλλ))(λambda λ)))))))))(λ(lambda)(λ(λλ)(λ(λλλ)(λ(λambda)(λ(λλλλ)(λ(λ)(if(λλ λλλλ)λ((((((lambda lambda)λλ)λλλ)λambda)(λλλ λλλλ))(λambda λ))))))))))zero?)sub1)add1)lambda)λαμβδα)))lambda)0)))sub1)zero?)lambda)1))

Name: Anonymous 2011-02-05 15:48

>>1
factorial n = procuct [1..n]

IHBT

Name: code less, create more 2011-02-05 15:52


factorial 1->1; n->n*(factorial n-1)


versus:

product :: [Integer] -> Integer
product []     = 1
product (x:xs) = x * product xs
factorial n = procuct [1..n]

Name: Anonymous 2011-02-05 15:53

>>7
Now post the implementation of the DSL.

>>5 is superior.

Name: Anonymous 2011-02-05 15:59

>>8
Sorry, I dont know about any free Common Lisp hosting to provide you web access to it.

Name: Anonymous 2011-02-05 16:01

>>9
How about just putting it on pastebin?

Name: Anonymous 2011-02-05 16:02

Name: Anonymous 2011-02-05 16:03

>>10>>11
First you put Haskell implementation there.

Name: Anonymous 2011-02-05 16:04

>>10
>pastebin
Pasting Lisp code to this lowly PHP site would be a disgrace.

Name: Anonymous 2011-02-05 16:07

Name: Anonymous 2011-02-05 16:14

Name: Anonymous 2011-02-05 16:16

>>15
But I'm >>5, I don't care about dead dogs.

Name: Anonymous 2011-02-05 16:18

>>9
Why do you need a hosting? Just zip/rar/7z up the source and upload it. If you want to update it, use github or similar.

Name: Anonymous 2011-02-05 16:20


: factorial 1 swap 1- for i * next ;

Name: Anonymous 2011-02-05 16:22

>>17
But I need a guestbook to store hate mails about how I butchered LISP and misunderstood concepts of Haskell. I also want to provide access for exectuing code directly from browser, so people I troll wont have to install SBCL beforehand or trust that my code wont mess their system.

Name: Anonymous 2011-02-05 16:25

>>19
Fake account on gitdumb.

Name: Anonymous 2011-02-05 16:27

>>20
git doesnt provide Common Lisp

Name: Anonymous 2011-02-05 16:37

Name: Anonymous 2011-02-05 16:38

In Lisp:
(((((((((((((((((((((((((((((((((())))))))))))))))))))))))))))))))))))))))

Name: Anonymous 2011-02-05 16:41

>>22
Not anonymous and they dont provide CL environment, only static pages.

Name: Anonymous 2011-02-05 16:43

>>23
In Lisp: >>5

Name: Anonymous 2011-02-05 16:44

>>24
Just fuck you and paste it somewhere.

Name: Anonymous 2011-02-05 16:44

>>18
: factorial 1+ 1 tuck +do i * loop ;

Fixed.

Name: Anonymous 2011-02-05 16:50

>>26
But I've nowhere to paste!

Name: Anonymous 2011-02-05 16:50

>>19
I chortled.

Name: code less, create more 2011-02-05 16:51

>>27
Lisp:

f 1->1; n->n*(f n-1)

Forth:

: f 1+ 1 tuck +do i * loop ;

Name: Anonymous 2011-02-05 16:52

>>30

                       //`'''````````,
             o        // ``in LISP'' `.,
       ,....OOo.   .c;.',,,.'``.,,.```
    .'      ____.,'.//
   / _____  \___/.'
  | / ||  \\---\|
  ||  ||   \\  ||
  co  co    co co

Name: Anonymous 2011-02-05 17:01

>>30
In Lisp: {(x) (apply * (range 1 x))}

Name: Anonymous 2011-02-05 17:24

>>30
f 0=1; f=n*f(n-1)

Name: Anonymous 2011-02-05 17:30

>>33
I tried `=`, but it made code look a bit messy. That is why I decided to use `->` for maps and `//` for comments, because `--` just didnt stand on its own and `;;` is way better as a delimiter.

Name: Anonymous 2011-02-05 17:33

Though I still use `=` for sorted list construction and modification. For example:

[x=1 y=2 @xs]

adds to `xs` keys `x` and `y` with their respectively values.

Name: Anonymous 2011-02-05 17:34

>>1
Haskell:
factorial = factorial'
factorial' isn't built in you say? Neither is your whoredsl.

Name: Anonymous 2011-02-05 17:34

PERL 6: n! THREAD OVER.

Name: Anonymous 2011-02-05 17:35

>>35
In C/C++ it would look like

xs[x]=1; xs[y]=2;

Name: Anonymous 2011-02-05 17:36

>>36
Haskell isnt builtin either.

Name: Anonymous 2011-02-05 17:36

>>39
It had better be.

Name: Anonymous 2011-02-05 17:39

>>40

$ ghc
bash: ghc: command not found

Name: Anonymous 2011-02-05 17:39

>>39
Neither are processor instructions.

Name: Anonymous 2011-02-05 17:40

>>41
Install House.

Name: Anonymous 2011-02-05 17:40

>>42
stop butthurting.
your language lost.
deal with it.

Name: Anonymous 2011-02-05 17:50

>>28
Excuses, excuses... if github doesn't work out for you, just archive it and put it on megaupload or some other file sharing site.

Name: Anonymous 2011-02-05 17:57

>megaupload
Pasting Lisp code to this lowly PHP site would be a disgrace.

Name: Anonymous 2011-02-05 18:01

>>44
your language lost.
Lisp never loses.

>>46
Pasting Lisp code to this lowly PHP site would be a disgrace.
paste.lisp.org

Name: Anonymous 2011-02-05 19:01

Name: Anonymous 2011-02-05 19:04

>>48
There's /prog/ for that.

Name: Anonymous 2011-02-05 19:07

>>49
/prog/ is too general

Name: Anonymous 2011-02-05 19:09

Name: Anonymous 2011-02-05 19:18

>>50
He obviously doesn't want to post his code since he's ashamed of it for some reason, so he'll give all kinds of excuses. If he wanted to publish his code for people to see, it would be incredibly easy and wouldn't take more than a few minutes to pack it up and upload anywhere.

Name: Anonymous 2011-02-05 19:26

>>52
Pasting Lisp code to this lowly PHP site would be a disgrace.

Name: Anonymous 2011-02-05 19:27

>>53
Pasting Lisp code to this lowly PHP site would be a disgrace.

Name: Anonymous 2011-02-05 19:31

>>54
doesnt stack

Name: Anonymous 2011-02-05 19:31

>>55
Pasting Lisp code to this lowly PHP site would be a disgrace.

Name: Anonymous 2011-02-05 19:34

Isn't the ``In Lisp'' DSL technically Lisp code? Isn't 4chan a lowly PHP site?

Name: Anonymous 2011-02-05 19:35

>>57
Shiichan is AN EXCEPTION.

Name: Anonymous 2011-02-05 19:50

>>58
Shiichan is also written in PHP, how is it an exception?

Name: Anonymous 2011-02-05 19:51

>>59
throw new Shiichan();

Name: Anonymous 2011-02-05 20:08

That exception will always go unhandled. Who would want to catch Shiichan?

Name: Anonymous 2011-02-05 20:23

>>61
That's why he shouldn't bitch about Shiichan, he doesn't handle it.

Name: Anonymous 2011-02-05 20:33

>>59
catch (Shiichan $_) {
   throw
new Up();
}

Name: Anonymous 2011-02-05 20:37

>>57
It was just little snippet. But if you host Lisp compiler on a PHP site, that would be a little strange as it would imply that your language is so useless, that it cant host even its own distribution. Of course this dont apply to Haskell, as Haskell is an ongoing research project, not a practical language, so its site is in PHP...

$ telnet haskell.org 80
Trying 78.46.100.180...
Connected to haskell.org.
Escape character is '^]'.
GET / HTTP/1.1
Host: haskell.org

HTTP/1.1 307 Temporary Redirect
Date: Tue, 21 Dec 2010 23:38:48 GMT
Server: Apache/2.2.9 (Debian) PHP/5.2.6-1+lenny9 with Suhosin-Patch

Name: Anonymous 2011-02-05 20:37

>>63
throw jew Up();

Name: Anonymous 2011-02-05 20:41

0]=> telnet common-lisp.net 80
Trying 208.72.159.207...
Connected to common-lisp.net.
Escape character is '^]'.
GET / HTTP/1.1
Host: common-lisp.net

HTTP/1.1 200 OK
Date: Sun, 06 Feb 2011 01:52:06 GMT
Server: Apache/1.3.34 (Debian)
PHP/4.4.4-8+etch6 mod_fastcgi/2.4.2 mod_perl/1.29
Transfer-Encoding: chunked
Content-Type: text/html; charset=iso-8859-1

Name: Anonymous 2011-02-05 20:42

>>65
Jewish wedding?

Name: Anonymous 2011-02-05 20:47

>>66
That is sad.

Name: Anonymous 2011-02-05 22:00

>>68
And expected.

Name: Anonymous 2011-02-05 23:03

>>68
what's so sad about it?
look like a normal LAMP server to me.

Name: Anonymous 2011-02-05 23:13

Non-toy language is non-toy. And learn2 HTTP.
[m]$ nc python.org 80
HEAD / HTTP/1.1
host: python.org

HTTP/1.1 200 OK
Date: Sun, 06 Feb 2011 04:06:44 GMT
Server: Apache/2.2.9 (Debian) DAV/2 SVN/1.5.1 mod_ssl/2.2.9 OpenSSL/0.9.8g mod_wsgi/2.5 [/code]Python/2.5.2
Last-Modified: Fri, 04 Feb 2011 10:18:37 GMT
ETag: "105800d-49a0-49b72348bd940"
Accept-Ranges: bytes
Content-Length: 18848
Content-Type: text/html

Name: Anonymous 2011-02-05 23:40

>>71
Non-shitty BBCoder doesn't fail BBCode.


0]=> telnet cliki.net 80
Trying 208.72.159.217...
Connected to cliki.net.
Escape character is '^]'.
GET / HTTP/1.1
Host: cliki.net

HTTP/1.1 302 Redirected
Date: Sun, 06 Feb 2011 04:45:33 GMT
Server: Araneida/0.84
Content-Type: text/html
Last-Modified: Sun, 06 Feb 2011 04:45:33 GMT
Location: http://www.cliki.net/index
Pragma: no-cache
Expires: Fri, 30 Oct 1998 14:19:41 GMT
Via: 1.1 cliki.net
Vary: Accept-Encoding
Transfer-Encoding: chunked

http://www.cliki.net/araneida


0]=> telnet racket-lang.org 80
Trying 129.10.115.116...
Connected to racket-lang.org.
Escape character is '^]'.
GET / HTTP/1.1
Host: racket-lang.org

HTTP/1.1 200 OK
Date: Sun, 06 Feb 2011 04:36:12 GMT
Server: Apache/2.2.15 (Fedora)
Last-Modified: Sat, 05 Feb 2011 09:10:12 GMT
ETag: "625b46-102f0-49b855db5e500"
Accept-Ranges: bytes
Content-Length: 66288
Connection: close
Content-Type: text/html; charset=UTF-8

(It's written in Racket)

Name: Anonymous 2011-02-06 0:13

Factorial in LISP
SLOW ASS FUCK

Name: Anonymous 2011-02-06 6:56

>>70
Maybe some hack to make some browsers work better, but real site is surelly in Lisp, just reports itself as PHP.

Name: Anonymous 2011-02-06 9:07

>>73
Chicken faster than C.

Name: Anonymous 2011-02-06 11:55

>>75
Only if you completely fail at C or intentionally write bad C code.

Name: Anonymous 2011-02-06 12:44

>>75
Why does chicken crossed the road?

Name: Anonymous 2011-02-06 12:46

>>77
Because it's AS FAST AS C

Name: Anonymous 2011-02-06 13:09

What about a memoizing factorial?

factorials = scanl (*) 1 [1..]
factorial n = factorials !! n

Name: Anonymous 2011-02-06 13:31

This is even garbage collector-friendly.
(define (memoize f)
  (let ((c (make-weak-hash)))
    (λ x
      (hash-ref c x(λ () (let ((y (apply f x))) (hash-set! c x y) y))))))
(define fib
  (memoize
   (λ (x)
     (if (< x 2) x
         (+ (fib (- x 1))
            (fib (- x 2)))))))

Name: Anonymous 2011-02-06 14:28

>>79
You dont need memoization to program video games.
But you do need side effects and maps to easily code stuff like

cursors =:
  ["human"=
     ["point"    =[ 3  2 (loadSprite 28 32 "ui/human/cursors/point.png")]
      "invalid"  =[ 3  2 (loadSprite 31 32 "ui/human/cursors/invalid.png")]
      "ch-green" =[15 15 (loadSprite 32 32 "ui/human/cursors/ch-green.png")]
      "ch-yellow"=[15 15 (loadSprite 32 32 "ui/human/cursors/ch-yellow.png")]
      "ch-red"   =[15 15 (loadSprite 32 32 "ui/human/cursors/ch-red.png")]]
   "orc"=
     ["point"    =[ 3  2 (loadSprite 26 32 "ui/orc/cursors/point.png")]
      "invalid"  =[ 3  2 (loadSprite 28 32 "ui/orc/cursors/invalid.png")]
      "ch-green" =[15 15 (loadSprite 32 32 "ui/orc/cursors/ch-green.png")]
      "ch-yellow"=[15 15 (loadSprite 32 32 "ui/orc/cursors/ch-yellow.png")]
      "ch-red"   =[15 15 (loadSprite 32 32 "ui/orc/cursors/ch-red.png")]]
   ]

cursor =: cursors."human"."point"
cursorXY =: [screen.w/2 screen.h/2]

main input gfx ->
  updateWorld input gfx !world && drawViewport world.thisPlayer world gfx

Name: Anonymous 2011-02-06 14:33

>>81
But you need syntactic sugar
FTFY

Name: Anonymous 2011-02-06 14:34

>>82
I need REPL to test my fucking cursors

cursor =: cursors."orc"."point"


in haskell I would have to recompile whole project :-[

Name: Anonymous 2011-02-06 14:36

>>83
>to recompile whole project
and then upload it back to xbox360/ps3

Name: Anonymous 2011-02-06 14:37

>>83
I'd use my (hash-refn cursors 'orc 'point) at the REPL. Haskellers should indeed feel kind of bad about :(

Name: Anonymous 2011-02-07 0:51

>>83
GHCI.

Name: Anonymous 2011-02-07 7:34

>>86
dont allow side effects

Name: Anonymous 2011-02-07 7:38

>>87
Nomads

Name: Anonymous 2011-02-07 11:41

Imagine a giant cudder flying towards your dotted pair, and there's nothing you can do about it. And you're like "Oh man, I'm gonna have to cons this thing", and you brace yourself to cons this giant cudder. But then, at the last moment, it changes trajectory and hits you in the car. You think to yourself "Well, at least I got that out of the way", but then the giant cudder rears back and gets assigned to the car again, and again, and again. Eventually, this giant car is penetrating your dotted pair, and you begin to lose control over your memory management. That's when the giant cudder foldrs into a single value, causing your stack to overflow. Unable to move and at your most vulnerable, the giant cudder finally lodges itself in your list, where it rests uncomfortable for 4, maybe 5 hours. That's what using Lisp is like.

Name: Anonymous 2011-02-07 11:55

>>89
causing your stack to overflow.
That's what using Lisp is like.

U MENA HASKAL!

Name: Anonymous 2011-02-07 11:59

>>89
My favorite CP and an original take on it, too? Thank you, I enjoyed it thoroughly!

Name: Anonymous 2011-02-07 17:43

factorial n = case n of 1->1; _->n*factorial (n-1)

BEHOLD 7 MORE CHARACTERS !

Name: Anonymous 2011-02-07 20:14

>>92
All I'm beholding is the disturbing lack of [code] tags in your post.

Name: Anonymous 2011-02-08 0:20

>>93
I bet he even writes his code in notepad.

Name: Anonymous 2012-07-16 6:13

>>5
GLORIOUS

Don't change these.
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