List and Array Operators

NeuG supports the list-like operations shown in the table below. These operations work with LIST values and, where noted, fixed-size ARRAY values.

Operator	Description	Example
`IN`	return true if an element is contained in the given list	`1 IN [1, 2, 3]`
`[]`	extract an element from a list or fixed-size array by zero-based index	`[10, 20, 30][0]`
`UNWIND`	expand a list or fixed-size array into one row per element	`MATCH (s:Sensor) UNWIND s.readings AS x RETURN x`

Array Values

ARRAY is a fixed-size list-like type declared with T[N]. It can be used with UNWIND:


CREATE NODE TABLE Sensor(id INT64, readings INT32[3], PRIMARY KEY(id));
CREATE (s:Sensor {id: 1, readings: [3, 1, 2]});
 
MATCH (s:Sensor)
UNWIND s.readings AS reading
RETURN reading
ORDER BY reading;

The result is one row per array element: 1, 2, 3. Fixed-size ARRAY properties also support direct zero-based indexing, for example s.readings[2].