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Showing content from http://cran.rstudio.com/web/packages/cowplot/../tinyarray/../testthat/../rstack/readme/README.html below:

README

rstack

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.

Installation
source("https://install-github.me/gaborcsardi/rstack")
Usage
library(rstack)
S <- stack$new()
S$push(1L)
S$peek()
#> [1] 1
#> [1] 1
#> [1] 0
S$push(NULL)
S$push(iris)
colnames(S$pop())
#> [1] "Sepal.Length" "Sepal.Width"  "Petal.Length" "Petal.Width"  "Species"
#> NULL
License

MIT © Mango Solutions, Gábor Csárdi


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