choosing all possible combination

[dawit]

Hello all,

I am developing a 8-ball pool website and i have a problem with fixtures. Teams are grouped in a league. There can be as many as 100 teams in a league. One team should play every other team. The script should display all the possible combination of teams. For example, if there are three teams A, B, and C, the script should display:

A --> B
A--->C

B--->A
B--->C

C-->A
C-->B

If you have any idea, how i can do this please, reply.

Thanks!

[laserlight]

hmm... n teams mean (1/2)n(n-1) combinations, or n(n-1) lines of fixtures.
For 100 teams this means 9900 lines of fixtures, which might be rather long for a single page.

$teams = array("A", "B", "C");
$teams_count = count($teams);
for ($i = 0; $i < $teams_count; $i++) {
	for ($j = 0; $j < $teams_count; $j++) {
		if ($i != $j) {
			echo $teams[$i] . " --> " . $teams[$j] . "<br />\n";
		}
	}
	echo "<br />\n";
}

You should be able to use a foreach loop instead.

EDIT:
been coding too much C++, my indices arent PHP variables anymore 😛

[dawit]

Thanks, laserlight