LPOS
Return the index of matching elements in a list.
LPOS key element [RANK rank] [COUNT num-matches] [MAXLEN len]Complexity
O(N) always — the whole list is copied before RANK / COUNT / MAXLEN are applied, so MAXLEN bounds the comparisons but not the copy
Complexity and compatibility are read out of kevy's implementation, not copied from Redis's reference. Several genuinely differ.
Redis compatibility
Compatible
Behaves as Redis does.
See also
BLPOPBRPOPBRPOPLPUSHLINDEXLLENLMOVELPOPLPUSHLRANGELREMLSETLTRIMRPOPRPOPLPUSHRPUSH