Stack data type as an ‘R6’ class
An extremely simple stack data type, implemented with ‘R6’ classes. The size of the stack increases as needed, and the amortized time complexity is O(1). The stack may contain arbitrary objects.
source("https://install-github.me/gaborcsardi/rstack")library(rstack)
S <- stack$new()
S$push(1L)
S$peek()#> [1] 1S$pop()#> [1] 1S$size()#> [1] 0S$push(NULL)
S$push(iris)
colnames(S$pop())#> [1] "Sepal.Length" "Sepal.Width" "Petal.Length" "Petal.Width" "Species"S$peek()#> NULLMIT © Mango Solutions, Gábor Csárdi