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


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