Re: Why doesn't working with array's ever stick in my thick head?

On May 9, 2008, at 1:05 PM, Dan Joseph wrote:

On Fri, May 9, 2008 at 12:56 PM, Jason Pruim <japruim@raoset.com> wrote:

Hi Everyone, SO it's friday, I'm tired, and I can't seem to think straight... I am attempting to do some very basic math with some arrays... Here's the pseudo code that I'm working with: NumberOfPieces * PieceWeight = TotalWeight explode total weight to get tenth's of pounds, then divide tenth's of pounds by 16 to grab ounces. Display TotalWeight # Exploded Ounces. Which I have working just fine for a single set of boxes... My problem is I want to be able to automatically add say 50 boxes in a form to process the weight of each route... So what I need to do is probably use some kind of a counter to loop through my $RoutePieces array and multiply by the $PieceWeight? $PieceWeight is a static number. Now let me show you some abbreviated code to try and explain what I'm using right now: <?PHP

      $i= "0";
      $num= "2";
      $PieceWeight = $_POST['txtPieceWeight'];
      $RoutePieces[] = $_POST['txtRoutePieces'];
      $RouteNumber[] = $_POST['txtRoute'];

      $totalWeight = $PieceWeight * $RoutePieces/16;
      $weightExplode = explode('.', $totalWeight);
      //$weightOunces = ((float)('.' . $weightExplode[1])) * 16;
      // Use stut's method... Seems cleaner
      $explodeOunces = ($totalWeight - intval($totalWeight)) * 16;

              while($i <= $num){
      echo <<<HTML

              <p>
      Route Number:<input type="text" name="txtRoute[$i]" size="4" value

="{$RouteNumber[$i]}"> Number of pieces: <input type="text" name="txtRoutePieces[$i]" size="4" value="{$RoutePieces[$i]}"><label>Total weight of route: {$weightExplode[0]} # {$explodeOunces} Ounces</label>

      </p>

HTML;

      $i++;
      echo $i;
              }

?> the $_POST array has the proper values stored properly... I just can't seem to figure out how to work with the values... Any ideas? Or slaps on the back of the head to wake me up a little? :) I need help :P -- Jason Pruim Raoset Inc. Technology Manager MQC Specialist 3251 132nd ave Holland, MI, 49424-9337 www.raoset.com japruim@raoset.com

Rather than a counter, you could use foreach: foreach ( $RoutePieces as $key => $value ) {

    $blah = $value * $PieceWeight;

} Make sense?

The idea make sense, and I think it will work. But I'm getting this error: [Fri May 9 13:19:33 2008] [error] PHP Fatal error: Unsupported operand types in /Volumes/RAIDer/webserver/Documents/dev/weightcalc/index.php on line 22 foreach ($RoutePieces as $key => $value){ $testWeight = $value * $PieceWeight; <-------Line 22 } Some quick trying tells me that the problem is my "*" I don't remember having this problem before. Is there another character I should use to multiply with? :) Thanks for looking! -- Jason Pruim Raoset Inc. Technology Manager MQC Specialist 3251 132nd ave Holland, MI, 49424-9337 www.raoset.com japruim@raoset.com