stacks

AutoIt file: Lists.au3

A stack is a last-in-first-out (LIFO) type of data list mostly used for temporarily pushing and popping values onto a stack.

Local $aMyStack = _StackCreate()
_StackPush( $aMyStack, "qwerty" ) ; added to last position
_StackPush( $aMyStack, "abcde" ) ; added to last position
....
If Not _StackIsEmpty( $aMyStack ) Then $Value = _StackPop( $aMyStack ) ; $Value = "abcde" 

Function	Description
_StackCreate	Creates a stack (LIFO) for pushing and popping values
_StackIsStack	Tests if given array is a stack
_StackIsEmpty	Tests if stack is empty
_StackClear	Clears a stack
_StackPush	Pushes (adds) a value onto the given stack at last position
_StackPop	Pops (removes) a value from the given stack at last position
_StackPeek	Gets the last pushed value without popping (removing)
_StackGet	Gets a value of a given position, zero-based
_StackValueInStack	Tests if a value is in the stack
_StackSize	Gets stack size
_StackToArray	Creates an array from the given stack
_ArrayToStack	Creates a stack from the given array

For first-in-first-out (FIFO) lists you can use [shift registers].