1. Install  libjpeg-turbo-progs, dcraw and ufraw.
2. You can use ufraw for displaying and enhancing a single image.
3. If you want to convert large number of files you can use following Perl script with dcraw tool:

   #!/usr/bin/perl
    
    
   opendir (DIR, ".");
   @files= readdir(DIR); 
   foreach $file (@files){
   	next unless $file =~ /([^\.]*)\.CR2$/; 
   	print "Converting $file\n";
   	system("dcraw -c $file | cjpeg > $1.jpg");
   }

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In the archive you can find your wall posts, photos, friends, events and messages.

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%!PS
3 setlinewidth 
% creating  a square
200 200 moveto
400 200 lineto
400 400 lineto
200 400 lineto
200 200 lineto
% drawing a square
stroke
% creating a circle located in (300,300) with radius 100
300 300 100 0 360 arc 
% drawing a square
stroke       
showpage

You should save it with extension .ps and open using Evince under Linux or GhostView under Windows.

Using this small set of commands: moveto, lineto, stroke, showpage, you can quickly vizualize your geometrical algorithms.
Here is example of creating an Archimedean spiral PostScript file in C++:

#include <cstdio>
#include <cstdlib>
#include <cmath>
using namespace std;
FILE * fin;
 
void spiral(double xstart, double ystart, double radius, double a, double b){
	fprintf(fin, "%f %f moveto\n", xstart+b, ystart);
	for(double fi=0.0; b+a*fi<=radius; fi+=0.1){
		double r = b+a*fi,
				 x = xstart + r*cos(fi),
				 y = ystart + r*sin(fi);
		fprintf(fin, "%f %f lineto\n", x, y);
	}
 
}
 
int main(int argc, char ** argv){
	double x, y, radius, a, b;
	if(argc!=6){
		printf("USAGE: ./spiral X Y R A B\n");
		x = 300; y=300; radius=200;
		a = 3; b= 40;
	} else{
		x = atof(argv[1]); y=atof(argv[2]); radius = atof(argv[3]);
		a = atof(argv[4]); b = atof(argv[5]);
	}
	fin=fopen("spiral.ps", "w");
	fprintf(fin, "%%!PS\n");
	fprintf(fin, "3 setlinewidth\n");
	spiral(x, y, radius, a, b);
	fprintf(fin, "stroke\n");
	fprintf(fin, "showpage\n");	
	fclose(fin);
	return 0;
}

Parameter a adjusts “density” of lines in a spiral.
Parameter b adjusts “hole” in the center of a spiral.

Web resources:
Simple PostScript commands pt. 1
Simple PostScript commands pt. 2
An introduction to PostScript

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puts(&3["abcdef"]);

At first glance it seems to not compile at all. But not only it compiles, but also prints “def”.

It’s an interesting example of “syntatic sugar“. In C++ synax tab[i] is an human-readable alias to *(tab+i). So following code:

	int tab[4];
	tab[3] = 17;
	printf("%d %d %d\n", tab[3], 3[tab], *(tab+3));

prints “17″ three times.

Let’s go back to our code.

3["abcdef"]

means

*(3 +"abcdef")

so this expression returns “d”. But when we obtain memory adress of “d” using & operator, we can print string that starts at “d” using puts command.
So the code prints “def”.

For more interesting examples of code obsfuscation visit: www.ioccc.org or International Obfuscated C Code Contest.

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There were a father Tobit and his son Tobias – Jews of the Tribe of Naphtali. They were living in captivity in Assyria during 8th century BC. After pidgeon had shitted over Tobit’s eyes and made him blind, Tobit started praying for a death. Later Tobit remembered that one men in Media owes him money. So before upcoming death he send his son, Tobias, in order to regain the debt. Tobit found Tobias a companion for this long and dangerous journey: a mysterious – but responsible and wise – man named Azariah.

After arriving in Media, Tobias met a young and beautiful girl named Sarah, whom he has the right to marry. Unfortunatelly, the girl is possesed by demon Asmodeus, who had killed every man she had tried to marry.

Would Tobit regain his debt? Whould Tobias marry Sarah or be killed by Asmodeus?
And finally, who is Azariah?

You can find answers here:
http://www.tldm.org/bible/old%20testament/tobias.htm

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The path of the righteous man is beset on all sides by the iniquities of the selfish and the tyranny of evil men. Blessed is he who, in the name of charity and good will, shepherds the weak through the valley of darkness, for he is truly his brother’s keeper and the finder of lost children. And I will strike down upon thee with great vengeance and furious anger those who attempt to poison and destroy my brothers. And you will know I am The Lord when I lay my vengeance upon thee.

In fact, the passage was made up by Tarantino, because Ezekiel 25:17 says only:

And I will execute great vengeance upon them with furious rebukes; and they shall know that I am the LORD, when I shall lay my vengeance upon them.

Anyway, there are still many “true” passages in the Bible that one can “memorize” like Jules. For example Izaiah 5:24-25:

Therefore as the fire devoureth the stubble, and the flame consumeth the chaff, so their root shall be as rottenness, and their blossom shall go up as dust: because they have cast away the law of the LORD of hosts, and despised the word of the Holy One of Israel.Therefore is the anger of the LORD kindled against his people, and he hath stretched forth his hand against them, and hath smitten them: and the hills did tremble, and their carcasses were torn in the midst of the streets. For all this his anger is not turned away, but his hand is stretched out still.

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