Match/validate a set of conditions for an object and continue with the action associated with the first valid match.Source:
This function was deprecated in purrr 1.0.0 because it's not related to the
core purpose of purrr. You can pull your code out of a pipe and use regular
else statements instead.
when() is a flavour of pattern matching (or an if-else abstraction) in
which a value is matched against a sequence of condition-action sets. When a
valid match/condition is found the action is executed and the result of the
action is returned.
the value to match against
formulas; each containing a condition as LHS and an action as RHS. named arguments will define additional values.
The value resulting from the action of the first valid match/condition is returned. If no matches are found, and no default is given, NULL will be returned.
Validity of the conditions are tested with
isTRUE, or equivalently
In other words conditions resulting in more than one logical will never
be valid. Note that the input value is always treated as a single object,
as opposed to the