map

The function iterates over items in an list or tuple and returns a new list based on the results of a given callback function.

This function does not generate an event.

Function

array.map(callback)

Arguments

Argument Type Description
callback closure (required) Closure to execute on each value.

Explanation of the callback argument:

Iterable Arguments Description
array item, index Iterate over all items in the array. Both item and index are optional.

Return value

A new list of items that are the result of the callback function.

Example

This code shows an example using map():

users = [{name: "Iris", age: 6}, {name: "Sasha", age: 34}];

// returns ["Iris", "Sasha"]
users.map(|user| user.name);

Return value in JSON format

[
    "Iris",
    "Sasha"
]