map_id

The function must be called on a list with things and returns a new list with the Ids of all the things.

// Take as example:
my_list.map_id();

// This is a fast shortcut for:
my_list.map(|item| item.id());

This function does not generate a change.

array.map_id()

None

A new list with the Ids for all the things in the original list.

This code shows an example using map_id():

.users = [{name: "Iris", age: 9}, {name: "Sasha", age: 37}];

// returns a list with Ids
.users.map_id();

Example return value in JSON format