Available since: 1.0.0
Time complexity: O(N) where N is the number of elements to traverse to get to the element at index. This makes asking for the first or the last element of the list O(1).
Returns the element at index
index in the list stored at
The index is zero-based, so
0 means the first element,
1 the second element
and so on.
Negative indices can be used to designate elements starting at the tail of the
-1 means the last element,
-2 means the penultimate and so forth.
When the value at
key is not a list, an error is returned.
Bulk string reply: the requested element, or
index is out of range.