LSET _key_ _index_ _value_

Set the list element at index (see LINDEX for information about the_index_ argument) with the new value. Out of range indexes willgenerate an error. Note that setting the first or last elements ofthe list is O(1).

Similarly to other list commands accepting indexes, the index can be negative to access elements starting from the end of the list. So -1 is the last element, -2 is the penultimate, and so forth.

Return value