Documentation

array.filter() function

array.filter() is experimental and subject to change at any time.

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.

Deprecated

Experimental array.filter() is deprecated in favor of array.filter().

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 "experimental/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!


Linux Package Signing Key Rotation

All signed InfluxData Linux packages have been resigned with an updated key. If using Linux, you may need to update your package configuration to continue to download and verify InfluxData software packages.

For more information, see the Linux Package Signing Key Rotation blog post.