I want to print something to the console from my constructor as shown in the snippet below, but I get the error <blockquote> <pre><code>Context: 'Seitenzahlenrechn...
This code is from flutter gallery and i'm trying to understanding and adapting it. I would know what this syntax means: <pre><code>class DemoItem<T> { Dem...
I am using flutter's latest(null safety) version and I created a constructor. This code does not show anything on the screen. Why can't I see icons and text?</p...
I'm trying to organize some Site class data in an Event class, but I'm getting a "The default value of an optional parameter must be constant" and I've been struggling...
I was watching a course and the instructor always write the constructor first, then the properties, in java, c# and other OOP languages the properties are written firs...
I have create a class called Size <ul> <li>Class name: Size</li> </ul> enter code <pre><code>import 'package:flutter/material.dart'; import 'package:firstap...
I am having a <code>user model class</code> that looks like this below <pre><code>class User { String? email; String? about; String? name; String? picture;...
I'm getting this error when I tried to build Object using Freezzed Package in Flutter <a href="https://i.stack.imgur.com/FeTbS.png" rel="nofollow noreferrer"><img src=...
I am using Firebase remote config to store my color values. This gives me the flexibilty to update colors without the need to update my app. Now I have written myself...
I have a class with non-nullable values whose default values I have defined in the constructor. <pre><code>class AirConPreferences { bool allowOn; int lowerTem...
What the title says. I have a freezed constructor tear-off that I'm trying to pass to a Widget and it's not returning null, and I'm trying to figure out what I'm doing...
Hi I am trying to print value of 'a' property of x object but I only get output once. <pre><code>void main() { var x = Test(Boy); x; x; x; x;...
I am implementing a class with multiple constructors, which is internally build around a IndexedWidgetBuilder (a function object) <pre><code>typedef IndexedWidget...
This should be an easy answer but I do not find the solution yet on the internet. Let say I have 1 <code>VoidCallback</code> field name <code>onStart</code> in...
i have this problem while running the app, which give A file can't be part of more than one library. <pre><code>import 'package:dio/dio.dart'; import 'package:fir...
