{
    "ARSCAN": {
        "summary": "Iterates existing elements in a range, returning index-value pairs.",
        "complexity": "O(P) where P is visited positions in touched slices (dense scanned slots + sparse entries), with worst-case O(|end-start|+1) and typical case close to O(N), where N is the number of existing elements in range.",
        "group": "array",
        "since": "8.8.0",
        "arity": -4,
        "function": "arscanCommand",
        "command_flags": [
            "READONLY"
        ],
        "acl_categories": [
            "ARRAY"
        ],
        "key_specs": [
            {
                "flags": [
                    "RO",
                    "ACCESS"
                ],
                "begin_search": {
                    "index": {
                        "pos": 1
                    }
                },
                "find_keys": {
                    "range": {
                        "lastkey": 0,
                        "step": 1,
                        "limit": 0
                    }
                }
            }
        ],
        "reply_schema": {
            "description": "Array of [index, value] pairs.",
            "type": "array",
            "items": {
                "type": "array",
                "minItems": 2,
                "maxItems": 2,
                "items": [
                    {
                        "type": "integer",
                        "description": "Index of existing element"
                    },
                    {
                        "type": "string",
                        "description": "Value at that index"
                    }
                ]
            }
        },
        "arguments": [
            {
                "name": "key",
                "type": "key",
                "key_spec_index": 0
            },
            {
                "name": "start",
                "type": "integer"
            },
            {
                "name": "end",
                "type": "integer"
            },
            {
                "name": "limit",
                "token": "LIMIT",
                "type": "integer",
                "optional": true
            }
        ]
    }
}