- Usage:
-
LINDEX key index
- 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).
- Since:
- 1.0.0
Returns the element at index index in the list stored at key.
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
list.
Here, -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.
Examples
127.0.0.1:6379> LPUSH mylist "World"
(integer) 1
127.0.0.1:6379> LPUSH mylist "Hello"
(integer) 2
127.0.0.1:6379> LINDEX mylist 0
"Hello"
127.0.0.1:6379> LINDEX mylist -1
"World"
127.0.0.1:6379> LINDEX mylist 3
(nil)