How update/transform values from objects inside an array in Dart

Question

Given an array of objects, iterate over it and change/add a few props while keeping most of the original props intact.

in javascript it would look like:

const trips = [
    { status: 1, name: "trip1", foo: "bar" }, 
    { status: 1, name: "trip2", foo: "bar" }, 
    { status: 3, name: "trip3", foo: "foobar" }]

const formatedTrips = trips.map(trip => ({
    ...trip,
    status: 1,
    foo: trip.foo === "bar" ? ` ${trips.name} bar` : "barbar"
}))

/**
 *  formatedTrips = [
        { status: 1, name: "trip1", foo: "trip1 bar" }, 
        { status: 1, name: "trip2", foo: "trip2 bar" }, 
        { status: 1, name: "trip3", foo: "barbar" }
    ]
 */

Tomer Ariel · Accepted Answer · 2022-07-17 09:23:51Z

2

dart has all of the standard array methods such as map, filter (it's called where), reduce and so on. They are very intuitive and feel very similar to JS. docs

More specifically, it depends on the type of trip. Is it a map? An instance of a custom class? If you'll share the inner workings of your code it'll be easier to help.

edited Jul 17, 2022 at 9:23

answered Jul 17, 2022 at 9:18

Tomer Ariel

1,5557 silver badges11 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

ViniciusCR Over a year ago

I've checked most of array method, but didn't find any that does this simple transformations. trip is just an object that was mapped from a api response. But I've updated the code to give more details about it'

Tomer Ariel Over a year ago

Are you somewhat familiar with dart's type system? dart is a statically typed language with no concept of native key: value objects like JS objects. Instead, there are different types such as Map<String, dynamic> which are probably more suited to what you need. Something like var a = {"wouldCompile": false} just isn't valid dart code. Again - if you were to share some of the dart source code, it would be much easier to help.

Collectives™ on Stack Overflow

How update/transform values from objects inside an array in Dart

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related