findRecord() function

findRecord() returns a row at a specified index as a record from the first table in a stream of tables that matches the specified predicate function.

The function returns an empty record if no table is found or if the index is out of bounds.

Function type signature

(<-tables: stream[B], fn: (key: A) => bool, idx: int) => B where A: Record, B: Record

Parameters

idx

(Required) Index of the record to extract.

fn

(Required) Predicate function to evaluate input table group keys.

findColumn() uses the first table that resolves as true. The predicate function requires a key argument that represents each input table’s group key as a record.

tables

Input data. Default is piped-forward data (<-).

Examples

Extract a row as a record

import "sampledata"

sampledata.int()
    |> findRecord(
        fn: (key) => key.tag == "t1",
        idx: 0,
    )// Returns {_time: 2021-01-01T00:00:00.000000000Z, _value: -2, tag: t1}