note 91921 added to language.oop5.iterations

This is what seems to work for checking isFirst() and isLast() on a class implementing the Iterator interface - without destroying the internal array pointer: // code: // Let $this->_elements be your internal array with // array("one", "two", "three") public function isFirst() { $hasPrevious = prev($this->_elements); // now undo if ($hasPrevious) { next($this->_elements); } else { reset($this->_elements); } return !$hasPrevious; } public function isLast() { $hasNext = next($this->_elements); // now undo if ($hasNext) { prev($this->_elements); } else { end($this->_elements); } return !$hasNext; } // usage foreach ($myInterator as $value) { echo $value; if ($myInterator->isFirst()) { echo " (first)"; } if ($myInterator->isLast()) { echo " (last)"; } echo " - value is still the same: ", $value, "<br />"; } // output one (first) - value is still the same: one two - value is still the same: two three (last) - value is still the same: three This can be helpfull for designing CSS elements where the first or last element must have a different padding/margin than the others. ---- Server IP: 212.124.37.9 Probable Submitter: 89.244.130.51 ---- Manual Page -- http://www.php.net/manual/en/language.oop5.iterations.php Edit -- https://master.php.net/note/edit/91921 Del: integrated -- https://master.php.net/note/delete/91921/integrated Del: useless -- https://master.php.net/note/delete/91921/useless Del: bad code -- https://master.php.net/note/delete/91921/bad+code Del: spam -- https://master.php.net/note/delete/91921/spam Del: non-english -- https://master.php.net/note/delete/91921/non-english Del: in docs -- https://master.php.net/note/delete/91921/in+docs Del: other reasons-- https://master.php.net/note/delete/91921 Reject -- https://master.php.net/note/reject/91921 Search -- https://master.php.net/manage/user-notes.php