Le 29/05/2012 14:45, Gary a écrit :
Okay, let's assume I have three "things", A, B, and C. I need to produce
an array with a list of all possible combinations of them, however many
there might be in those combinations: e.g. A, B, C, D, AB, AC, AD, BC,
ABC (not sure if I've missed any!). Normally I'm pretty good at working
this stuff out, but to be honest I'm struggling with this one, at least
to do it in any kind of elegant way. Does anyone have any ideas?
Idealy what I'd like is a multidimensional array depending on the number
of "things" in the combination. Something like:
array(2) {
[0]=>
array(3) {
[0]=>
array(1) {
["name"]=>
string(7) "A"
}
[1]=>
array(2) {
["name"]=>
string(5) "B"
}
[2]=>
array(2) {
["name"]=>
string(4) "C"
}
}
[1]=>
array(...) {
[0]=>
array(2) {
["name"]=>
string(13) "A+B"
}
[1]=>
array(2) {
["name"]=>
string(12) "A+C"
}
(etc.)
--
Gary Please do NOT send me 'courtesy' replies off-list.
Enjoy !
function combinations($letters) {
$combinations = array(array());
foreach ($letters as $letter) {
foreach ($combinations as $combination) {
$combinations[] = array_merge($combination, array($letter));
}
}
return $combinations;
}
print"<pre>";print_r(combinations(array('a','b','c')));print"</pre>";
outputs :
Array
(
[0] => Array
(
)
[1] => Array
(
[0] => a
)
[2] => Array
(
[0] => b
)
[3] => Array
(
[0] => a
[1] => b
)
[4] => Array
(
[0] => c
)
[5] => Array
(
[0] => a
[1] => c
)
[6] => Array
(
[0] => b
[1] => c
)
[7] => Array
(
[0] => a
[1] => b
[2] => c
)
)
--
Florian Lemaitre
Développeur Web -- Cellule Edition Web/Publishing
Ligne directe : +32 69 250 554
Nos sites :
www.Potoroze.com <http://www.Potoroze.com> le portail de shopping mode
et beauté
www.Flash-Promos.com <http://www.Flash-Promos.com> le portail des codes
promos
_www.LaFriperieduCoin.com <http://www.LaFriperieduCoin.com>_ le
spécialiste des petites annonces mode gratuites
/Pôle Digital//, Evolution S.A/
12 rue des sablières, ZI Tournai Ouest II, 7503 Froyennes - BELGIQUE
Fax: +32 69 221 122
www.evolutioncom.eu <http://www.evolutioncom.eu>
