shift registers

AutoIt file: Lists.au3

A shift register is a first-in-first-out (FIFO) type of data list. A value is placed at the first position by pushing it into it. And by popping the last value is returned and removed.

Local $aMyShift = _ShiftCreate()
_ShiftPush( $aMyShift, "qwerty" ) ; into first position
_ShiftPush( $aMyShift, "abcde" ) ; into first position
....
If Not _ShiftIsEmpty( $aMyShift ) Then $Value = _ShiftPop( $aMyShift ) ; $Value = "qwerty" (last value)

Function	Description
_ShiftCreate	Creates a shift register (FIFO) for pushing and popping values
_ShiftIsShift	Tests if given array is a shift register
_ShiftIsEmpty	Tests if shift register is empty
_ShiftClear	Clears a shift
_ShiftPush	Pushes (adds) a value into the given shift register on first position
_ShiftPop	Pops (removes) a value from the given shift register at last position
_ShiftPeek	Gets the value to pop without actual popping (removing)
_ShiftGet	Gets a value of a given position, zero-based
_ShiftValueInShift	Tests if a value is in the shift register
_ShiftSize	Gets shift register size
_ShiftToArray	Creates an array from the given shift register
_ArrayToShift	Creates a shift register from the given array

For last-in-first-out (LIFO) lists you can use [stacks].