Insert value by index in Redis list

Question

Is there any way to insert a value into a Redis list by index?

LINSERT can do it by value, but that seems a little backward in that the same value could appear multiple times in the list.

Answer 1

There is a work around which may be a little slow, since all are O(n) operations.

• Use LIndex to save old value at client.
• Use LSet to set a tag value which would never inserted in the list on the index.
• Use LINSERT to insert 2 values(new value, old saved value) after the tag value.
• Use LRem to delete the tag value.
• All operations should be in a transaction.