On your class DVDPlayer you chose to say that a regular DVDPlayer cannot record. So you set it to false. If you want it to record you either change the variable directly, like you did on the class DVDPlayerTestDrive. The boolean canRecord = false is only meant to show you that it is possible to … Read more
I assume you need a way to make it more dynamic than manually typing [0] then [1] and so on? You can loop the txtfile with foreach and assign new array items with []. $file = fopen(“path of txt”); foreach($file as $line){ $numDoc[] = substr($line, 46, 5); $dateDoc[] = substr($line, 30, 8); } The code … Read more
The identifier private restricts access to class methods and class friends. The static identifier indicates there is only 1 instance of the variable to be shared among all children. So, private static means a data member that has only one instance, regardless of the number of instances, and only class methods and class friends can … Read more
you have to create a class contructor class CIRCLE : public SHAPE { public: CIRCLE() { name=”circle”; } void display() { cout<<name; } }; 2 solved How to set class member as constant? [closed]
Class in another class, the error as TypeError: Student.__init__() missing 1 required positional argument: ‘lap’ in line 21. s1=Student(‘raj’,2) [closed] solved Class in another class, the error as TypeError: Student.__init__() missing 1 required positional argument: ‘lap’ in line 21. s1=Student(‘raj’,2) [closed]
first you typed example e; So first constructor called and 1 printed example() { cout<<“1”; number = 1; } output : 1 then you typed : e=10 its equal to e = example(10); so another constructor called : example(int value) /// beacause you used example(10) { cout<<“2”; number = value; } so your output is … Read more
Here are two differences: An overloaded assignment operator must be a member of the class being assigned to; it cannot be declared as a free function. Copy and move assignment operators will be implicitly declared for your class if you do not declare them yourself (subject to certain restrictions). solved What is the difference between … Read more
Introduction The assignment operator is a special operator in C++ that is used to assign a value to a variable. It is different from other operators in that it can be overloaded, meaning that it can be given a new meaning or behavior. Overloading the assignment operator allows for more flexibility when assigning values to … Read more
A few pieces of information that might help when looking at code like this: Calling an object or class as a function calls the appropriate apply method if there is one Parentheses are often optional so another way to rewrite the code above would be: val route = HttpService.apply({ case GET -> Root / “hello” … Read more
Ruby does have first class functions. What makes you think it doesn’t? From wikipedia: A language that has first-class functions is one where: The language supports constructing new functions during the execution of a program, storing them in data structures, passing them as arguments to other functions, and returning them as the values of other … Read more
To use PDO is apparently the best way to display data from MySQL database using OOP in PHP $stmt = $Connection->prepare(“SELECT * FROM countries WHERE name = ?”); $stmt->execute([“name_for_search”]); $data = $stmt->fetchAll(); solved How to display data in MYSQLI using OOP in PHP .
Private variables are there to help with the work behind the scenes in a class, work that the creator doesn’t want you interfering in. Just because you can’t see or access the private variables, it doesn’t mean the compiler’s just going to throw them away. Perhaps it will make more sense to you in this … Read more
You mean you want to call the base constructor from the derived constructor? Yes, you can do that with the base() construct. public Derived(int sides) : base(sides) When Square() actually isn’t a constructor (it is in your question, no return type or void) but a method, you can do it like this: public override returntype … Read more
There is an error in your function function showCart() { $cart = $_SESSION[“cart”]; if ($cart) { $output = explode(“,”,$cart); $content = array(); // FAULT HERE MAYBE ? foreach ($products as $product) { Your foreach used $products but you do not have this variable. You need to assign that variable the way you do in the … Read more
public void isSpace(String[] array) { for (int i=0; i<array.length; i++) { if( (array[i] == null) || (array[i].trim().length() == 0)) { //true on null, empty string, or white space only. Do something here array[i] = “add some thing here”; } else { //not null, not empty string, or not white space. Do something here } } … Read more