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Two functions and one problem

P: n/a

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
Jul 18 '06 #1
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3 Replies


P: n/a

"Nico" <ni**@nospam.itwrote in message news:44********@news.unimib.it...
>
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
I don't know if these ae related to your problem, but:
1 - indices start with zero, not one.
2 - A semicolon ends a sentence so I don't understand your argument list
3 - I cannot follow your naming in "combinations".

Is this a school project?

Shelly
Jul 18 '06 #2

P: n/a
Nic
Thanks for the answer.
No. This is not a school project. Just a funny hobby.

Nico

"Sheldon Glickler" <sh*******@asap-consult.comha scritto nel messaggio
news:Lv*************@twister.nyroc.rr.com...
>
"Nico" <ni**@nospam.itwrote in message news:44********@news.unimib.it...
>>
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

I don't know if these ae related to your problem, but:
1 - indices start with zero, not one.
2 - A semicolon ends a sentence so I don't understand your argument list
3 - I cannot follow your naming in "combinations".

Is this a school project?

Shelly

Jul 18 '06 #3

P: n/a
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:
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
Jul 18 '06 #4

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