{ "ZLEXCOUNT": { "summary": "Returns the number of members in a sorted set within a lexicographical range.", "complexity": "O(log(N)) with N being the number of elements in the sorted set.", "group": "sorted_set", "since": "2.8.9", "arity": 4, "function": "zlexcountCommand", "command_flags": [ "READONLY", "FAST" ], "acl_categories": [ "SORTEDSET" ], "key_specs": [ { "flags": [ "RO", "ACCESS" ], "begin_search": { "index": { "pos": 1 } }, "find_keys": { "range": { "lastkey": 0, "step": 1, "limit": 0 } } } ], "reply_schema": { "description": "Number of elements in the specified score range.", "type": "integer", "minimum": 0 }, "arguments": [ { "name": "key", "type": "key", "key_spec_index": 0 }, { "name": "min", "type": "string" }, { "name": "max", "type": "string" } ] } }