array.filter() function

array.filter() iterates over an array, evaluates each element with a predicate function, and then returns a new array with only elements that match the predicate.

Function type signature
(<-arr: [A], fn: (x: A) => bool) => [A]
For more information, see Function type signatures.



Array to filter. Default is the piped-forward array (<-).


(Required) Predicate function to evaluate on each element. The element is represented by x in the predicate function.


Filter array of integers

import "array"

a = [
b = a |> array.filter(fn: (x) => x >= 3)

// b returns [3, 4, 5]
// Output the filtered array as a table
array.from(rows: b |> (x) => ({_value: x})))

View example output

Was this page helpful?

Thank you for your feedback!

Introducing InfluxDB Clustered

A highly available InfluxDB 3.0 cluster on your own infrastructure.

InfluxDB Clustered is a highly available InfluxDB 3.0 cluster built for high write and query workloads on your own infrastructure.

InfluxDB Clustered is currently in limited availability and is only available to a limited group of InfluxData customers. If interested in being part of the limited access group, please contact the InfluxData Sales team.

Learn more
Contact InfluxData Sales

The future of Flux

Flux is going into maintenance mode. You can continue using it as you currently are without any changes to your code.

Flux is going into maintenance mode and will not be supported in InfluxDB 3.0. This was a decision based on the broad demand for SQL and the continued growth and adoption of InfluxQL. We are continuing to support Flux for users in 1.x and 2.x so you can continue using it with no changes to your code. If you are interested in transitioning to InfluxDB 3.0 and want to future-proof your code, we suggest using InfluxQL.

For information about the future of Flux, see the following: