{ "ZRANDMEMBER": { "summary": "Returns one or more random members from a sorted set.", "complexity": "O(N) where N is the number of members returned", "group": "sorted_set", "since": "6.2.0", "arity": -2, "function": "zrandmemberCommand", "command_flags": [ "READONLY" ], "acl_categories": [ "SORTEDSET" ], "command_tips": [ "NONDETERMINISTIC_OUTPUT" ], "key_specs": [ { "flags": [ "RO", "ACCESS" ], "begin_search": { "index": { "pos": 1 } }, "find_keys": { "range": { "lastkey": 0, "step": 1, "limit": 0 } } } ], "reply_schema": { "anyOf": [ { "type": "null", "description": "Key does not exist." }, { "type": "string", "description": "Randomly selected element when 'COUNT' is not used." }, { "type": "array", "description": "Randomly selected elements when 'COUNT' is used.", "items": { "type": "string" } }, { "type": "array", "description": "Randomly selected elements when 'COUNT' and 'WITHSCORES' modifiers are used.", "items": { "type": "array", "minItems": 2, "maxItems": 2, "items": [ { "type": "string", "description": "Element." }, { "type": "number", "description": "Score." } ] } } ] }, "arguments": [ { "name": "key", "type": "key", "key_spec_index": 0 }, { "name": "options", "type": "block", "optional": true, "arguments": [ { "name": "count", "type": "integer" }, { "name": "withscores", "token": "WITHSCORES", "type": "pure-token", "optional": true } ] } ] } }