Represantation of Stack {Rfast}

Represantation of Stack

Description

Represantation of Stack.

Usage

Stack(x,type=NULL)

Arguments

x

Any type that could be convert to vector or an integer value.

type

A type for the Stack, "integer", "numeric" or any other that accepts one argument.

Details

Stack is an abstract data type - data structure based on the principle of last in first out. To access the 3 fields, use operator "$".

Value

An object of class "Stack". This object holds 3 fields:

pop: remove the first element (from the top). top: access the first element (from the top). push: add an element to the top of the Stack.

Author(s)

R implementation and documentation: Manos Papadakis <[e-mail]>.

See Also

colShuffle, colVars, colmeans, read.directory

Examples

x<-Stack(10,type=integer)

x$push(5)
x$push(10)
x$top()  == 10
x$pop()
x$top() == 5

y<-rnorm(10)
x<-Stack(x)

x$push(5) # length increased to 11
x$top() # access the last element that pushed, 5
x$pop() # pop the last element that pushed