add_elements: Adds named elements to a list when they are not there already.
Description
Adds named elements to a list when they are not there already.
Usage
add_elements(input, ..., .eager = TRUE)
Arguments
- input
List. The input list to manipulate.
- ...
Key value pairs to add to the list provided the key is not already
used.
- .eager
Logical; Should the value
s be evaluated?