bare-type-predicates | Bare type predicates |
filepreds | File system predicates |
is_date | Is a Date? |
is_empty | Is a vector/list empty? |
is_formula | Is a formula? |
is_scalar | Is of length one? |
is_time | Is a time (Date-Time)? |
nas | NA predicates |
scalar-type-predicates | Scalar type predicates |
type-predicates | Type predicates |
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