keeping two array's data equal?

dreams4000

Hey all,

Perhaps someone can give me some hints to the right direction here. I have two arrays, the data in them should always match up.. in the example below, 1 should always be with w1 and 2 should always be with w2 etc. I have a form that will shrink(or grow) the $weeks array.

$week_values = array('1','2','3','4','5','6','7','8','9','10');
$weeks = array('w1','w2','w3','w4','w5','w6','w7','w8','w9','w10');
$week_count = count($weeks);


for ($i=0; $i < $week_count; $i++) {

echo $week_values[$i]. " / ".$weeks[$i] ."<br>";


}

The problem I am having is that the $weeks array may shrink or grow at both ends at the same time or at one or the other end while the $weeks_values array will stay the same.

$week_values = array('1','2','3','4','5','6','7','8','9','10');
$weeks = array('w3','w4','w5','w6','w7','w8');

With that being said, I would then need to gather only the values from $week_values that match with the values of $weeks.. eg skip 1 and 2, but get 3 through 8 and skip 9 and 10 from the example above. I can get it to do either the first numbers in the array or the last, but not both together. If I need to explain this a little better just let me know. Thanks for any advice!

dreams4000

I tried a bit of test code on the example I presented above, it seems to work in the example. (dont have the main code with me on this system to actually try it out) If anyone sees a problem with this method, comments would be cool.

$week_values = array('1','2','3','4','5','6','7','8','9','10');
$weeks = array('w3','w4','w5','w6','w7','w8','w9');

$week_count = count($weeks);
$weeks_count = count($week_values);

$wk = abs($week_count - $weeks_count);

$j = 0;

// do a date count diff between the orig. end date and new end date, then subtract if there is a change to get how many from the end of the $weeks array need to be subtracted.
//If there is a change: -1 is variable based on # of weeks change:
$b = $wk -1;
//If there is not a change: 
//I know.. not an if statement, but would be in the main code, this is just for testing.
//$b = $wk;




for ($i=0; $i < $week_count; $i++) {


echo $weeks[$j]. " / ".$week_values[$b] ."<br>";


$j++;
$b++;

}

Installer

I think you would have an easier time with it if you used just one array, with one set of data as the indexes and the other as the values, especially since, it seems, you want always to have a one-to-one matchup.

dreams4000

Not sure how you would go about making this into a single array. This is a simple example of what I am trying to do from a form that will have quite a bit more than just two. The form grows dynamically based off of user input, while other parts stay the same. I think it would probably be harder keeping it as a single array and trying to figure out the mess in that than keeping them seperate. Not sure how doing this in a single would be any easier?:\

Installer

Well, as I said, it seemed (from your first post) that you were working with one-to-one data, i.e. just two values per [input/query/whatever].

I'm still guessing that a single array, but multi-dimensional, would be your best bet, like:

$array = array('1', '', '', ''),
         array('2', 'w2', 'x2', 'y2'),
         array('n', 'wn', 'xn', 'yn'));

foeach ($array as $value) {
    if ($value[1] == '') {
        continue;
    } else {
        process_it();
    }
}

Frankly, trying to juggle separate arrays sounds like a "mess" to me, and an almost sure source of bugs.