Apply predicate to all variablesSource:
These quoting functions signal to scoped filtering verbs
filter_all()) that a predicate expression
should be applied to all relevant variables. The
variant takes the intersection of the predicate expressions with
& while the
any_vars() variant takes the union with
data-masking> An expression that returns a logical vector, using
.to refer to the "current" variable.
vars() for other quoting functions that you
can use with scoped verbs.