{ "SPOP": { "summary": "Returns one or more random members from a set after removing them. Deletes the set if the last member was popped.", "complexity": "Without the count argument O(1), otherwise O(N) where N is the value of the passed count.", "group": "set", "since": "1.0.0", "arity": -2, "function": "spopCommand", "history": [ [ "3.2.0", "Added the `count` argument." ] ], "command_flags": [ "WRITE", "FAST" ], "acl_categories": [ "SET" ], "command_tips": [ "NONDETERMINISTIC_OUTPUT" ], "key_specs": [ { "flags": [ "RW", "ACCESS", "DELETE" ], "begin_search": { "index": { "pos": 1 } }, "find_keys": { "range": { "lastkey": 0, "step": 1, "limit": 0 } } } ], "reply_schema": { "oneOf": [ { "type": "null", "description": "The key does not exist." }, { "type": "string", "description": "The removed member when 'COUNT' is not given." }, { "type": "array", "description": "List to the removed members when 'COUNT' is given.", "uniqueItems": true, "items": { "type": "string" } } ] }, "arguments": [ { "name": "key", "type": "key", "key_spec_index": 0 }, { "name": "count", "type": "integer", "optional": true, "since": "3.2.0" } ] } }