Documentation

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.

Parameters

arr

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

fn

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

Examples

Filter array of integers

import "array"

a = [
    1,
    2,
    3,
    4,
    5,
]
b = a |> array.filter(fn: (x) => x >= 3)

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

View example output


Was this page helpful?

Thank you for your feedback!


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.

Read more

New in InfluxDB 3.4

Key enhancements in InfluxDB 3.4 and the InfluxDB 3 Explorer 1.2.

See the Blog Post

InfluxDB 3.4 is now available for both Core and Enterprise, which introduces offline token generation for use in automated deployments and configurable license type selection that lets you bypass the interactive license prompt. InfluxDB 3 Explorer 1.2 is also available, which includes InfluxDB cache management and other new features.

For more information, check out: