Two functions and one problem

Nico · *nix forums beginner Joined: 18 Jul 2006 Posts: 1

Hi,

I've created the following sample php code.

Elements<br>
<?php
$elements[1]="element1";
$elements[2]="element2";
$elements[3]="element3";
$elements[4]="element4";
$elements[5]="element5";
?>
Combinations
<?php
$combinations[1][1]="element1"; // Combination of element 1 with element
2
$combinations[1][2]="element2";
$combinations[2][1]="element3"; // Combination of element 1 with element
3
$combinations[2][2]="element1";
$combinations[3][1]="element4"; // Combination of element 1 with element
4
$combinations[3][2]="element1";
$combinations[4][1]="element5"; // Combination of element 1 with element
5
$combinations[4][2]="element1";
?>

I'd like to define two simple functions:
countcombinations(a,...;b,...)
listcombinations(a,...;b,...)

The first function "countcombinations(a,...;b,...)" should count how many
combinations exist in which "a" and "..." are included and "b" and "..."
are not included.

Example
countcombinations(element1;element2,element3)
Result: 2 ("element1 combined with element4" and "element1 combined with
element5")

The second function "listcombinations(a,...;b,...)" should list the elements
combined with "a" and "...", excluding from the list the elements "b" and
"...".

Example
listcombinations(element1;element2,element3)
Result: element4, element5

I've some difficult in defining this two functions.
Can you help me please?
Many thanks.

Best,
Nico

Shelly · *nix forums Guru Wannabe Joined: 22 May 2005 Posts: 146

"Nico" <nico@nospam.it> wrote in message news:44bcabd9$1@news.unimib.it...

cdf · *nix forums Guru Joined: 25 Apr 2005 Posts: 303

Thanks for the answer.
No. This is not a school project. Just a funny hobby.

Nico

"Sheldon Glickler" <sheldonlg@asap-consult.com> ha scritto nel messaggio
news:Lv2vg.93$1Z5.65@twister.nyroc.rr.com...

ImOk · *nix forums beginner Joined: 07 Jul 2006 Posts: 29

Nico,

This is not a PHP problem. I would pose this question in one of the
math or statistical groups.

Once you get the pseudo code in place it should be easy to program it
in PHP.

Nico wrote:

Google