if

how do i wrote if statements in LISP?

I can't really think of any sarcastic reply to this, so I'll give the real answer;

[code](if
  <if-cond>
  <if-sexp>
  <else-sexp> )

Ow, dicks!

(if
  <if-cond>
  <if-sexp>
  <else-sexp> )

>>2
>>3
why thank you


<if-cond>
(jp Z else)
<if-sexp>
(jp endif)
else:
<else-sexp>
endif:

>>5
Are you gay or what.

i tend to use cond more than if, even when i could use if.

>>5
Dijkstra wouldn't have liked this.

(when <cond>
   <s-exps>*)
(unless (not <cond>)
    <s-exps>*)

But you really should define a macro:
(defmacro .if (test if-true &body if-false)
   `(progn (when ,test ,if-true) (when (not ,test) ,@if-false)))

.IF
0] (.if t (print 3) (print 4))


NIL3
0]

ups:
(when cond ...) (unless cond ...)

>>9 You should not double evaluate things:


(defmacro .if (test if-true &body if-false)
   (let ((s-cond (gensym)))
      `(let ((,s-cond ,test))
          (when ,s-cond ,if-true)
          (unless ,s-cond ,@if-false))))

(if <condition> <then> <else>)

(if FUCK! <condition> .. ... ... ASS! <then> <elSHITCOCKse>)

My Lisp has Tourette's.

>>13
I have FUCK COCKTHUCKING GODDAMNED THITCOCKFATHE Tourette's with a lisp.

#T9OXx8q|

>>15
Nice.
% ./tripcode.py sussman
Looking for tripcode containing: sussman

;_;

;_;

>>16
DO WANT

s

p

sepplesu ^_^

Wow. If statements are the easiest part of Lisp. Can anyone teach me to use OpenGL in Scheme?

>>22
You don't. OpenGL would mean you're potentially using a toy language for something useful, and that's impossible.

>>22
PLT scheme, gl in collects/ and the example games in examples/

>>22 here.

>>23
LOLNO. Gauche and PLT have opengl extensions.

>>24
I use Gauche :( Is it worth switching interpreter, or can you teach me to make HalfLife 2 in Scheme?

>>25
it\'s a 3d and physics engine with all sorts of fancy rendering capabilities. it would be easier just to create some scheme bindings on top of some open source engine.

>>26
I am aware of what OpenGL is. PLT and Gauche has libraries, but I think PLT might have superior documentation.

>>27
I might say that MzScheme may produce faster code. It's hard to say because I haven't seen benchmarks and I haven't tried Gauche first-hand, although I have been meaning to. PLT compiles to bytecode, and it also can do JIT compilation on x86 and some others, and it has more developers working on it. So my gut feeling is it might be faster. I'm not sure about its GL documentation, but it does have examples in the collects/ directory, wherever you installed it on your system of choice. It has a 3D Chess game among other things.

I think you misread what >>26 was saying. He was talking about the HalfLife 2 engine, I believe; not OpenGL. Basically if the engine is written in C or some ASM, then it will be uber fast and additionally, there's no need to re-invent all that great code when you can just make a wrapper for it.

Gauche might have better GL support, I'm not sure. PLT's is just an FFI library. I'd say try them both, and try >>26's suggestion.

Also noteworthy for those interested in writing games in functional languages: Haskell has nice GL support. There's a game written in it called 'Frag' that someone wrote for his undergraduate thesis. Google it!

Stop discussing about using toy languages for serious stuff, it doesn't make them any less toy.

>>29
Dijkstra wouldn't have liked this attitude.

fluxus

The end based on   additional knowledge of   the problem common   sense or trial.

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first class if

JEWS

>>34
Ok, then what?