Function: popElement

Removes and returns the last element of a list. Returns null if performed on an empty list.

Syntax

popElement(array)

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 and 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.

See Also

• Functions
• copyList()