Documentation

array.map() function

array.map() iterates over an array, applies a function to each element to produce a new element, and then returns a new array.

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

Parameters

arr

Array to operate on. Defaults is the piped-forward array (<-).

fn

(Required) Function to apply to elements. The element is represented by x in the function.

Examples

Convert an array of integers to an array of records

import "array"

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

// b returns [{_value: 1}, {_value: 2}, {_value: 3}, {_value: 4}, {_value: 5}]
// Output the array of records as a table
array.from(rows: b)

View example output


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