VarBundle

Author: Brandon C. Loudermilk

Introduction: VarBundles support defensive programming by making it easy for R developers to bundle conceptually related read-only variables in a named, list-like object of unmutable constants.

library(VarBundle)
thresholds <- varbundle(list(min = 1, max = 100))

# Read-only Access
thresholds$max #100
thresholds[["min"]] #1

# Assignment throws error
thresholds$min <- 25 # VarBundle fields are read only.

# Cannot create new fields after object creation
thesholds$foo <- 10 # Cannot add new fields to VarBundle

The quickest way to learn about {VarBundle} is to install the package and read the vignette.

browseVignettes(package = "VarBundle")