This is a simple stack object offering add / pop functionality
     
    
    Public fields
    
stack 
A list containing the current stack
 
 
     
    
    Methods
Method add()
Adds content to the end of the stack (must be a list)
Arguments
x 
content to add to the stack
 
 
 
 
Method pop()
Retrieve content from the stack
Arguments
i 
the number of items to retrieve from the stack. If there are less than i
items left on the stack it will just return everything that is left.
 
 
 
 
Method clone()
The objects of this class are cloneable with this method.
Usage
Stack$clone(deep = FALSE)
 
 
 
Arguments
deep 
Whether to make a deep clone.