Reverses the order of items in a sequence. If $arg is the empty sequence,
the empty sequence is returned.
For detailed type semantics, see
Section
7.2.12 The fn:reverse function[FS].
The sequence of items to be reversed.
If you pass in a single value,
it is treated as a ValueIterator with that single item; therefore, if you
pass in an array, the array is treated as a single value (not as one value
for each item in the array). If you mean to pass in
the values of each item in the array, then you can call
xdmp.arrayValues on the array.
targetValueIteratorValueIterator
The sequence you specify to reverse must fit into memory, so the sequence
size should not be larger than your memory cache sizes.
var x = xdmp.arrayValues(["a", "b", "c"]);
fn.reverse(x);
=> ("c", "b", "a")
fn.reverse("hello")
=> ("hello")
fn.reverse(null)
=> ()