Re: [SMARTY-DEV] enhanced foreach loops

Kerry Wilson wrote:

False or null is fine with me. I am working on it and here is the problems I have found. I am trying to use the prev and next functions, these move the internal pointer on the array. They behave differently whether the array in the foreach is a reference or not: $array = array( 'a' => 'a', 'b' => 'b', 'c' => 'c' ); $_from = $array; foreach( $_from AS $key => $value ) { $element = current($_from); echo $element; } will print aaa, since the internal cursor of _from will not be moved and a will be the current one where as: $_from = &$array; will print abc, b/c the internal cursor is moved no, it does not, it prints out "bc " as in the loop current() is already the next one.

I really wonder what such "enhancement" can serve. -- toggg > > so for next and previous methods to work with smarty the _from > assignment will have to be changed to reference ( & ) and we have to be > careful not to move pointer ( php doesn't have method for 'peeking' > ahead? ) > > prev($_from); // Rewind b/c current is really the next element > $previous = prev($_from); // This assigns previous > next($_from); // Now we are back to previous > next($_from); // Now we are back to current > $next = next($_from); // Get next > prev($_from); // move back to current > > wow all that just to get the neighboring values, anyone know a better way? > > > Ken Snyder wrote: >> Very interesting idea... You could do {assign var=previous_call >> value=$message.backtrace[$smarty.foreach.backtrace.index + 1]} but it >> wouldn't work for associative arrays or objects. I like it! What >> would be the desired behavior of $smarty.foreach.NAME.next when on the >> last item? A default value? NULL? >> >> --Ken >> >> Kerry Wilson wrote: >>> I would like to enhance the foreach loop by adding next and previous >>> to the foreach variables. >>> >>> Example usage: >>> >>> {foreach from=$message.backtrace item='call' name='backtrace'} >>> {assign var='previous_call' value=|$smarty.foreach.backtrace.next}| >>> <li style='list-style: none;'>{$call.file} [{$call.line}] - >>> {$previous_call.class}.{$previous_call.function}(){/if}</li> >>> {/foreach} >>> >>> In case you cannot tell I am using this to print a backtrace ( I want >>> it to show the method it is currently in, not the one that it is >>> calling ). >>> >>> Where does the foreach implementation reside in source? And is this >>> a good thing to add to the base code? >>> >> > >