problems with DPL example.

2011-10-10 Thread %u 
Hello.  I'm having problems compiling the following:

// From chapter 1 of D Programming Language.
//
import std.stdio, std.string;

void main() {
  uint[string] dictionary;

  foreach( line; stdin.byLine()) {
// Break sentence into words
// Add each word in the sentence to the vocabulary
foreach( word; splitter(strip(line))) {
  if( word in dictionary) continue; // Nothing to do.
  auto newID = dictionary.length;
  dictionary[word] = newID;
  writeln( newid, '\t', word);
}
  }
  return;
}



$ dmd wordcount.d
wordcount.d(9): Error: undefined identifier splitter



$ dmd -v
DMD32 D Compiler v2.055
Copyright (c) 1999-2011 by Digital Mars written by Walter Bright
Documentation: http://www.digitalmars.com/d/2.0/index.html


I am doing the examples in cygwin.

Anyone know what the problem is?


thanks.

Re: problems with DPL example.

2011-10-10 Thread simendsjo 

On 10.10.2011 19:55, %u wrote:

Hello.  I'm having problems compiling the following:

// From chapter 1 of D Programming Language.
//
import std.stdio, std.string;

void main() {
   uint[string] dictionary;

   foreach( line; stdin.byLine()) {
 // Break sentence into words
 // Add each word in the sentence to the vocabulary
 foreach( word; splitter(strip(line))) {
   if( word in dictionary) continue; // Nothing to do.
   auto newID = dictionary.length;
   dictionary[word] = newID;
   writeln( newid, '\t', word);
 }
   }
   return;
}



$ dmd wordcount.d
wordcount.d(9): Error: undefined identifier splitter



$ dmd -v
DMD32 D Compiler v2.055
Copyright (c) 1999-2011 by Digital Mars written by Walter Bright
Documentation: http://www.digitalmars.com/d/2.0/index.html


I am doing the examples in cygwin.

Anyone know what the problem is?


thanks.




Seems some functionality was moved in 2.052. From std.string documentation:
IMPORTANT NOTE: Beginning with version 2.052, the following symbols 
have been generalized beyond strings and moved to different modules.

And
split Use std.array.split instead

std.array includes both split and splitter.
http://www.d-programming-language.org/phobos/std_array.html#split

Re: problems with DPL example.

2011-10-10 Thread Justin Whear 
You need to create an immutable copy of word before using it as a key. That 
is, replace this line:

   dictionary[word] = newID;

with
   dictionary[word.idup] = newID;

Re: problems with DPL example.

2011-10-10 Thread bearophile 
%u:

 Decho hello | wordcount2.exe  wordcount2.d
 0   hello
 std.stdio.StdioException@std\stdio.d(2156): Bad file descriptor

Try:

wordcount2.exe  wordcount2.d

Bye,
bearophile

Re: problems with DPL example.

2011-10-10 Thread simendsjo 

On 10.10.2011 21:38, bearophile wrote:

%u:


Decho hello | wordcount2.exe  wordcount2.d
0   hello
std.stdio.StdioException@std\stdio.d(2156): Bad file descriptor


Try:

wordcount2.exe  wordcount2.d

Bye,
bearophile


Shouldn't the original way work too?

Another point: I recommend compiling with debug symbols as it gives you 
a nice stacktrace.

Re: problems with DPL example.

2011-10-10 Thread %u 
== Quote from bearophile (bearophileh...@lycos.com)'s article
 simendsjo:
  Shouldn't the original way work too?
 I don't remember.
  Another point: I recommend compiling with debug symbols as it
gives you
  a nice stacktrace.
 I think debug symbols should be present on default, to produce a
nice stack trace on default, and be disabled with a compiler switch
:-)
 Bye,
 bearophile


If I use file indirection instead of piping output to the d
program, it works in cygwin window.

I'm not a dos expert, so I don't know how to do the same test on
windows.

anyways, thanks!

Re: problems with DPL example.

2011-10-10 Thread Jonathan M Davis 
You should checkout out this page: http://erdani.com/tdpl/errata/

- Jonathan M Davis

Re: ref struct?

2011-10-10 Thread bearophile 
Andrej Mitrovic:

 I think this is what refcounted structs are for.

ref structs are regular heap-allocated GC-managed structs, but they are 
managed by reference instead of by pointer. So refcounting is not significant 
here.

--

Jonathan M Davis:

 That or make it a class and make it final.

Such class instances have a 2 words overhead, plus runtime code to initialize 
those fields. ref structs don't have them.

Bye,
bearophile

Re: ref struct?

2011-10-10 Thread Andrej Mitrovic 
On 10/11/11, bearophile bearophileh...@lycos.com wrote:
 Andrej Mitrovic:

 I think this is what refcounted structs are for.

 ref structs are regular heap-allocated GC-managed structs, but they are
 managed by reference instead of by pointer. So refcounting is not
 significant here.

But can't you just make a wrapper struct that GC-allocates an internal
struct and uses subtyping and refcounting?

indexing php

2011-10-10 Thread sclytrack 
Every time I press on the D via web browser I get
wanna download indexing dot php while D.learn works
without problem.