Re: Simple array problem

Roberto Costumero Moreno wrote:

I think the problem is easier... and also the solutions doing a "for" instead of "foreach" are not good solutions because if the array is not index-consecutive the loop fails. So, if you has an array with the colors as indexes and the integer value X as the value for that position of the array, updating is very easy. You have an array such as: $array = array( ); $array['blue'] = 4; $array['orange'] = 5; $array['green'] = 6; .... So if you want to update the key 'orange' with a new value $new_value is as easy as: $array['orange'] += $new_value; As the new value is being passed as an array so as to update it, it should be like: $new_value = array('orange',2); So you have to do a foreach in the $new_value array like: foreach ($new_value as $key => $value){ if(in_array($key,$array)){

      $array[$key] += $value;

} } I think that solution works and is the easiest way to do it. Cheers, Roberto On 01/07/2008, tedd <tedd.sperling@gmail.com> wrote:

At 9:35 AM +0100 7/1/08, Richard Heyes wrote:

Brian Dunning wrote:

Seems like it should be really simple but all the ways I can figure out to do it are too kludgey.

It's rather easy: for ($i=0; $i<count($arr); $i++) { if ($arr[$i][0] == $new_array[0]) {

       $arr[$i][1] += $new_array[1];
       break; // Optional - means the first "orange" found will be
              // updated only

} } -- Richard Heyes

Small correction: for ($i=0; $i<count($arr); $i++) { if ($arr[$i][0] == $new_value [0])

     {
       $arr[$i][1] += $new_value [1];
       break; // Optional - means the first "orange" found will be
              // updated only
      }

} See here: http://www.webbytedd.com/b1/array/ But, I'm not sure as to why you (Brian) would want to do that anyway. tedd -- ------- http://sperling.com http://ancientstones.com http://earthstones.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php

All of that is fine and dandy, but what if he can't change the structure of the array?