What is difference when you use curly brackets inside constructor in dart classes and when you don't use it. And why you can not have not nullable and not initialized fields inside constructor when you use curly brackets, but you…
I'm working on some code which needs to be changed to be async (because of library upgrade). My code has same base class which is inherited by other classes and I want to call some functions in constructor which are…
I've got an instance where I want to create X number of Classes that all need a constructor to assign a logging service, and then all have a method create which will handle the data object differently depending on the…
I'm currently learning construct function in javascript and wanted to play some experiment about it, but ended stuck in here for like 5 hours and didn't what to do. So, I have this (superclass) constructor function to made basic function…
I get this error in Flutter i'm trying to use data but the constructor did't allow and gives two error 1/ error: 'Category' isn't a function. (invocation_of_non_function at [torrism] libapp_data.dart:8) 2/error: The name 'Category' is defined in the libraries 'package:flutter/src/foundation/annotations.dart…
Our client has a drupal website, but the host has forced all clients from PHP 7.4 to PHP version 8, causing a PDO fatal error preventing the site from loading. Error Received: Fatal error: Declaration of DrupalCoreDatabaseStatement::fetchAll(int $mode = PDO::FETCH_DEFAULT,…
I am trying to create a homepage where I will output question with its answers I have a question which has 3 answers, but when I create the object it only return 1 answer, whereas I need it to return…
Please refer this Code input This code doesn't give the expected output class User{ protected $name; protected $age; public function __construct($name, $age){ $this->name = $name; $this->age = $age; } } class Customer extends User{ private $balance; public function __construct($name, $age,…
Description of Issue I was reviewing my code for one of my projects when I noticed that one of my function's name is coloured green while all of the other functions are yellow. When I hover over the function in…
I have created a program, where I have the class dog, with many attributes, together with methods for creating an instance of the class, constructor and getting and setting the attributes. Then I have class CPanel, which is supposed to…