Function: popElement
Removes and returns the last element of a list. Returns null if performed on an empty list.
Syntax
popElement(array)
| Argument | Type | Description |
|---|---|---|
| array | Array | List of values |
Examples
$aList = [ 1, 2 ], popElement($aList)
The new value of $alist is [ 1 ] (a list containing a single member, the integer 1)
$aList = [ 1, 2 ], $lastElement = popElement($aList)
$lastElement now has the integer value 2 (not in a list) and, as before, the new value of $alist is [ 1 ]
popElement([2,0,1])
popElement() returns the value 1 and removes this element from the list, leaving [2,0]. Since the list [ 2,0,1 ] was never assigned to a variable, this operation simply returns the value 1 ad has no other effects.
$discountFilter = ifNull($discountFilterId, _NULL, popElement($discountFilters)
popElement() returns the discount filter from the end of the list of filters, then removes this filter from the list.