oneoffVariable: One-off Global Variables

Description Usage Arguments Value Examples

View source: R/utils.R

Description

Defines a function that allow to get/assign a global variable whose value is ensured to be reset after each access.

Usage

1
oneoffVariable(default = NULL)

Arguments

default

default value to which the global variable is reset after each access. Default is NULL.

Value

a function with one argument (value) that provides get/set access to a global variable. If called with a value, it assigns this value to the global variable. If called with no argument, it returns the current value of the global variable and reset it to its default value – as defined at its creation.

Examples

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
x <- oneoffVariable(0)
# returns default value
x()
# assign a value
x(3)
# get the value
x()
# second call returns default value again 
x()
 

pkgmaker documentation built on May 26, 2018, 1:03 a.m.