Ptt 的功能未來可能性

Why Use Parallel Computing?
*Other reasons might include:
**Overcoming memory constraints - single computers have very finite memory resources. For large problems, using the memories of multiple computers may overcome this obstacle.

用 MPI 實做應該可行，不用特地買一台 20,000 NT 的 quad cores 機器。

"The C Programming Language", Answers to Exercises

原來有這個東西，之前就開始寫了，只是後來不知道怎麼對答案，所以就沒有繼續了。有空拿出來把範例全寫完吧！

Answers to Exercises

Heredoc

Heredoc

class foo {
    public $bar = <<bar
EOT;
}
?>

* Windows PowerShell

MVC - Model-view-controller

Model-view-controller

Model-view-controller (MVC) is an architectural pattern used in software engineering. In complex computer applications that present a large amount of data to the user, a developer often wishes to separate data (model) and user interface (view) concerns, so that changes to the user interface will not affect data handling, and that the data can be reorganized without changing the user interface. The model-view-controller solves this problem by decoupling data access and business logic from data presentation and user interaction, by introducing an intermediate component: the controller.

Perl::Catalyst
Perl::Jifty
PHP::CakePHP
PHP::Zend Framework

The brief is a good brief of wikipedia, I love its style forever.

cd2iso

The magic of creating CD ISO files under Windows

/* This program has been compiled with VC6 and tested under Windows XP SP2 */
  #include 
  #include 

  int main ( int argc, char ** argv )
  {
    FILE * f, * out;
    char buf[512];
    unsigned len;

    if (argc != 2)
    {
      fprintf( stderr, "Syntax: rdiso filename\n" );
      return 1;
    }

    if ( (f = _fsopen( "\\\\?\\CdRom0", "rb", _SH_DENYNO )) == NULL)
    {
      fprintf( stderr, "Can't open CdRom0\n" );
      return 1;
    }

    if ( (out = fopen( argv[1], "wb" )) == NULL)
    {
      fprintf( stderr, "Can't open %s\n", argv[1] );
      return 1;
    }

    do
    {
      len = fread( buf, 1, sizeof(buf), f );
      if (len)
        fwrite( buf, 1, len, out );
    }
    while (len == sizeof(buf));
    fclose( f );
    fclose( out );
    return 0;
  }

In the book, "The Complete FreeBSD", wrote,

“Those Linux books hve over1000 pages! This looks like nothing. What can you do? We need something yesterday!”

Haha~~

莫名其妙...

1 + 8 + 16 + 32 + 64 = 121 cores

開心～～～～～～～～～ :D

ssh-copy-id

ssh-copy-id - install your identity.pub in a remote machine’s authorized_keys

ssh-copy-id [-i [identity_file]] [user@]machine

Never have it again!!!

int** ptr = malloc( sizeof(int) * SIZE );
char** ptr = malloc( sizeof(char) * SIZE );

WRONG

int** ptr = malloc( sizeof(int**) * SIZE );
char** ptr = malloc( sizeof(char**) * SIZE );

RIGHT