digitalmars.D - OT: What's your favorite codeline?

A Bothe (6/6) Aug 29 2009 What's your favorite line of D code?

language_fan (3/9) Aug 29 2009 foreach(Problem p; World.problems) find_answer_to(p);

Manfred_Nowak (2/5) Aug 29 2009 ... because it doesn't have `World.plan' to its disposal.

Jeremie Pelletier (2/9) Aug 29 2009 You are lacking a world context, cultural semantics, a problem solver, a...

Ary Borenszweig (4/8) Aug 29 2009 Isn't that C#? :-)

language_fan (3/13) Aug 29 2009 I've heard a d guru known as 'downs' is the master of obfuscated one-

downs (12/26) Aug 30 2009 Well I wouldn't call myself a 'guru' .. 'mutilator', mebbe :)

Robert Fraser (5/7) Sep 01 2009 Heh, I love that infix expression syntax. Too abd it ends up with a

downs (8/21) Sep 02 2009 I'm 90% sure it can.

language_fan (9/39) Sep 02 2009 This is impressive. You acknowledge that the functional representation i...

Tom S (12/13) Aug 30 2009 I like my recent:

A Bothe <info alexanderbothe.com> writes:

What's your favorite line of D code?

My one is
Application.Run();

And yours?

------------------------------------------------------------------------------
PS: Check out my D-IDE at http://www.alexanderbothe.com/?id=27

Aug 29 2009

language_fan <foo bar.com.invalid> writes:

Sat, 29 Aug 2009 11:14:15 -0400, A Bothe thusly wrote:

 What's your favorite line of D code?
 
 My one is
 Application.Run();
 
 And yours?

foreach(Problem p; World.problems) find_answer_to(p);

It just always seems to get stuck.

Aug 29 2009

"Manfred_Nowak" <svv1999 hotmail.com> writes:

incognito wrote:

 foreach(Problem p; World.problems) find_answer_to(p);
 
 It just always seems to get stuck.

... because it doesn't have `World.plan' to its disposal.

Aug 29 2009

Jeremie Pelletier <jeremiep gmail.com> writes:

Manfred_Nowak Wrote:

 incognito wrote:
 
 foreach(Problem p; World.problems) find_answer_to(p);
 
 It just always seems to get stuck.

 
 ... because it doesn't have `World.plan' to its disposal.

You are lacking a world context, cultural semantics, a problem solver, and a
very very large pool of random. Maybe an abstract country factory.

Aug 29 2009

Ary Borenszweig <ary esperanto.org.ar> writes:

A Bothe escribi�:
 What's your favorite line of D code?
 
 My one is
 Application.Run();



I think a favorite line of D code should have a feature of D that 
doesn't appear in any other language...

Aug 29 2009

language_fan <foo bar.com.invalid> writes:

Sat, 29 Aug 2009 13:45:23 -0300, Ary Borenszweig thusly wrote:

 A Bothe escribió:
 What's your favorite line of D code?
 
 My one is
 Application.Run();

 

 
 I think a favorite line of D code should have a feature of D that
 doesn't appear in any other language...

I've heard a d guru known as 'downs' is the master of obfuscated one-
liners.

Aug 29 2009

downs <default_357-line yahoo.de> writes:

language_fan wrote:
 Sat, 29 Aug 2009 13:45:23 -0300, Ary Borenszweig thusly wrote:
 
 A Bothe escribió:
 What's your favorite line of D code?

 My one is
 Application.Run();



 I think a favorite line of D code should have a feature of D that
 doesn't appear in any other language...

 
 I've heard a d guru known as 'downs' is the master of obfuscated one-
 liners.

Well I wouldn't call myself a 'guru' .. 'mutilator', mebbe :)

That being said, here's the results of a quick grep of my #d log for memorable
lines


<downs>       Bignum!(To - From)* slice(int From, int To)() { return
cast(Bignum!(To - From)*) ((cast(Type*) this) + From); }

<downs>     struct ZipIterator(A, B) { A a; B b; int length() { return
min(a.length, b.length); } Stuple!(typeof(a[0]), typeof(b[0])) opIndex(T...)(T
t) { return stuple(a[t], b[t]); } int opApply(C)(C callable) { for (int x = 0;
x < length; ++x) { static if (is(typeof(callable(x, a[x], b[x])))) { if (auto
res = callable(x, a[x], b[x])) return res; } else { if (auto res =
callable(a[x], b[x])) return res; } } return 0; } }

<downs>     class Lévy : LSystem!(8) {
<downs>       mixin(LSysFunc("X -> +X--X+ / step"));

<downs>     Ret!(T[$-1]) delegate(Param!(T[$-1])[T.length - 1 .. $])
bind(T...)(T params) { struct Stuff { T data; Ret!(T[$-1])
call(Param!(T[$-1])[T.length - 1 .. $] rest) { return data[$-1](data[0 .. $-1],
rest); } } auto res = new Stuff; foreach (id, value; params) res.data[id] =
value; return &res.call; }

<downs>         prettyprint(rand%640, rand%480, Center, rgb(col), Fill =
rgb(hsv((col.h + 128) % 255, col.s, col.v)), Format("[size ", rand() % 12 + 8,
"] Don't worry, be happy! [/size]"));

<downs>     foo.betweens("src=\"", "\"") /select/ (string s) { return
s.find(criteria) != -1; }

<downs>     "/proc/cpuinfo".read().castLike("").between("cpu MHz",
"\n").between(": ", "")

<downs>     auto videocon = ctx.getStreams().first(WHERE!("?.codec.codec_type
== CodecType.Video")).codec;

Aug 30 2009

Robert Fraser <fraserofthenight gmail.com> writes:

downs wrote:
 <downs>     foo.betweens("src=\"", "\"") /select/ (string s) { return
s.find(criteria) != -1; }

Heh, I love that infix expression syntax. Too abd it ends up with a 
completely useless wrapper struct & 2 function calls, but hopefully LDC 
can inline that out.

 <downs>     auto videocon = ctx.getStreams().first(WHERE!("?.codec.codec_type
== CodecType.Video")).codec;

Heh, going LINQ on us, now?

Sep 01 2009

downs <default_357-line yahoo.de> writes:

Robert Fraser wrote:
 downs wrote:
 <downs>     foo.betweens("src=\"", "\"") /select/ (string s) { return
 s.find(criteria) != -1; }

 
 Heh, I love that infix expression syntax. Too abd it ends up with a
 completely useless wrapper struct & 2 function calls, but hopefully LDC
 can inline that out.
 

I'm 90% sure it can.

[update] Actually, I just tried and LDC compiles a simple /select/ test to
plain, inlined code.
[update2] GDC doesn't.
[update3] For that matter, neither does DMD.

LDC is really shaping up to be the best D compiler out there. It already is on
Unix (imho). Now if only they can get win32 exception support to work ..

 <downs>     auto videocon =
 ctx.getStreams().first(WHERE!("?.codec.codec_type ==
 CodecType.Video")).codec;

 
 Heh, going LINQ on us, now?

I _was_ thinking of that :) Could have used ex!() but WHERE is a little denser.

(for comparison: ex!("c -> c.codec.codec_type == CodecType.Video") )

Sep 02 2009

language_fan <foo bar.com.invalid> writes:

Wed, 02 Sep 2009 10:28:58 +0200, downs thusly wrote:

 Robert Fraser wrote:
 downs wrote:
 <downs>     foo.betweens("src=\"", "\"") /select/ (string s) { return
 s.find(criteria) != -1; }

 
 Heh, I love that infix expression syntax. Too abd it ends up with a
 completely useless wrapper struct & 2 function calls, but hopefully LDC
 can inline that out.
 
 

 I'm 90% sure it can.
 
 [update] Actually, I just tried and LDC compiles a simple /select/ test
 to plain, inlined code. [update2] GDC doesn't.
 [update3] For that matter, neither does DMD.
 
 LDC is really shaping up to be the best D compiler out there. It already
 is on Unix (imho). Now if only they can get win32 exception support to
 work ..
 
 <downs>     auto videocon =
 ctx.getStreams().first(WHERE!("?.codec.codec_type ==
 CodecType.Video")).codec;

 
 Heh, going LINQ on us, now?

 
 I _was_ thinking of that :) Could have used ex!() but WHERE is a little
 denser.
 
 (for comparison: ex!("c -> c.codec.codec_type == CodecType.Video") )

This is impressive. You acknowledge that the functional representation is 
so much better that you actually implement its compiler with the 
metaprogramming facilities. Imagine, in future, you can just write, mixin 
compile("SML", ` some code ... `); and all your problems are solved. It's 
a shame the built-in syntax looks like this crap

  (T)(T c){ return c; }

instead of this

  c -> c

Sep 02 2009

Tom S <h3r3tic remove.mat.uni.torun.pl> writes:

A Bothe wrote:
 What's your favorite line of D code?

I like my recent:

c.resFunc = cast(void 
function(void*))(*cast(void***)proto.resources[origResIdx].init().ptr)[
	Command.Type.ResAcquire == c.type ? 1 : 2
];

Sure, it's 3 lines, but still one statement and if I were downs, that 
would *be* one line ;D


-- 
Tomasz Stachowiak
http://h3.team0xf.com/
h3/h3r3tic on #D freenode

Aug 30 2009

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digitalmars.D - OT: What's your favorite codeline?