Re: Pointers For Newbies, Reminders For Oldies

On Wed, 2010-01-27 at 08:01 -0800, Michael A. Peters wrote: > Paul M Foster wrote: > > "... should be obvious - but are often overlooked - points within coding > > practice that can cause the programmer to develop bad habits and bad > > code." - Dan Brown > > > > Tip #1: > > > > Don't use count() in loops unless there are very few items to count and > > performance doesn't matter, or the number will vary over the loop. That > > is, don't do this: > > > > for ($i = 0; $i < count($items); $i++) > > > > Instead, do this: > > > > $number = count($items); > > for ($i = 0; $i < $number; $i++) > > Gah! > > for ($i=0;$i<sizeof($array);$i++) > > is something I do all the time. > So the array size is being calculated each iteration? > Yeah, the condition is evaluated once for each cycle of the loop. I use the count() a lot myself tbh, but I don't often have the call to work with massive data sets and huge loops. Thanks, Ash http://www.ashleysheridan.co.uk