Is a vector sorted?
is_sorted(x, asc = NA)isntSorted(x, asc = NA)
is_sorted returns TRUE or FALSE
isntSorted returns 0 if sorted or the first position
that proves the vector is not sorted
An atomic vector.
Single logical. If NA, the default, a vector is considered
sorted if it is either sorted ascending or sorted descending;
if FALSE, a vector is sorted only if sorted descending;
if TRUE, a vector is sorted only if sorted ascending.