One-off Global Variables

Description

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

Usage

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  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

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x <- oneoffVariable(0)
# returns default value
x()
# assign a value
x(3)
# get the value
x()
# second call returns default value again
x()

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