len
The len method returns the length of the given input. This is useful in query strings where a user needs to get the size of a Vector or a Java array.
Syntax
len(values)
Parameters
| Parameter | Type | Description |
|---|---|---|
| values | Union[byte[], char[], double[], float[], int[], long[], short[], LongSizedDataStructure, T[] | An input array for which the length will be calculated. |
Returns
A long-typed value representing the length of the input.
Example
The following example demonstrates the use of len within a query string.
from deephaven import empty_table
source = empty_table(10).update(["X = i"]).group_by()
result = source.update(["LenX = len(X)"])
- source
- result