Re: Sum two arrays

*This message was transferred with a trial version of CommuniGate(tm) Pro* I'm not sure if Larry Realized that his indexes don't match.... $a = indexes 01, 02, 04 and $b = indexes 01, 03, 05? Assuming both indexes are the same(which would make sense because you want to add them together). see: http://www.phpexamples.net/modules.php?name=Code_Exchange&func=viewSnippet&s nippetId=19 As long ast the array indexes match, you shouldn't have and problems, and if one of the array indexes doesn't have anything, it will still add... just add 0. Rolf Brusletto rolf@phpExamples.net PHP/MySQL Coder Security Admin http://www.phpExamples.net ----- Original Message ----- From: "Jason k Larson" <jlarson@candlefire.org> To: <Larry_Li@amat.com> Cc: <php-general@lists.php.net> Sent: Saturday, April 12, 2003 1:42 AM Subject: Re: [PHP] Sum two arrays > *This message was transferred with a trial version of CommuniGate(tm) Pro* > I'm sure there is a cleaner, better way ... but here's how I did it in 1 > minute. > > $a = array("01"=>10,"02"=>20,"04"=>40); > $b = array("01"=>10,"03"=>30,"05"=>50); > $c = array(); > > foreach ($a as $idx => $val) > { > if (isset ($c[$idx])) { $c[$idx] = $c[$idx] + $a[$idx]; } > else { $c[$idx] = $a[$idx]; } > } > foreach ($b as $idx => $val) > { > if (isset ($c[$idx])) { $c[$idx] = $c[$idx] + $b[$idx]; } > else { $c[$idx] = $b[$idx]; } > } > > HTH, > Jason k Larson > > > Larry_Li@amat.com wrote: > > $a=array("01"=>10,"02"=>20,"04"=>40); > > $b=array("01"=>10,"03"=>30,"05"=>50); > > > > > > $c=$a+$b; > > > > > > $c=array("01"=>20,"02"=>20,"03"=>30,"04"=>40,"05"=>50); > > > > Thanks, > > Larry > > > > > > > > > > > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php > >