is_null_or_na

<p>This function silently handles special cases for which is.null() and is.na() may return a warning,
such as functions objects or environments.
(e.g. the warning "Warning message: In is.na(g) : is.na() applied to non-(list or vector) of type 'closure')"</p>

internal

Set of functions to keep track and find objects in user-defined environments
by identifying environments by name --which cannot be retrieved with the built-in function environmentName().
The package also provides functionality to obtain simplified information about function calling chains
and to get an object's memory address.

Daniel Mastropietro

is_null_or_na: Check whether an object is NULL or NA.

Description

Usage

Arguments

Value