[Solved] Please solve these errors. I’m using dev++ compiler [closed]

The first error is a typo you wrote pememory. The second error appears because you didn’t code any transformation between Float and ptrFloat. You should add a copy constructor to Float: Float(const Float& a) : Float(*a.fmem_top) {} And then a conversion constructor to ptrFloat: ptrFloat(Float a) : Float(a) { pmem_top=pmemory; *pmem_top=abc; pmem_top++; } PS: your … Read more

[Solved] keep a separate file with php class and pass variable to it [closed]

Put the class in one file, then include it using any of these options: Includes: include ($_SERVER[‘DOCUMENT_ROOT’].’/includes/class.php’); Require: require ($_SERVER[‘DOCUMENT_ROOT’].’/includes/class.php’); Require Once: require_once ($_SERVER[‘DOCUMENT_ROOT’].’/includes/class.php’); Or you can target the class with ajax or a form: /includes/class.php?var=input In the class include you would use: if(!empty($_GET[‘var’])){ //Do some check here for validation //let’s say I’m expecting a … Read more

[Solved] Java Strings are immutable? [duplicate]

The object itself didn’t change. What you have done is the following name <- String(“Paul”) name <- String(“Henry”) String(“Paul”) has been not been changed. Try the following: String a = “test”; String b = a; a = “test2”; System.out.println(b); solved Java Strings are immutable? [duplicate]

[Solved] Iterating through a generic list property

Use var here, the compiler than will decide in the foreach loop from which type the SearchItem in the list is. In this example var is of type string/ SearchViewModel<string> vs = new SearchViewModel<string>(new List<string> { “1”,”2″,”3″}); foreach (var item in vs.SearchItems) { // logic, item in this case is string } solved Iterating through … Read more

[Solved] How to show all arrays without numbers etc

This is nothing related to PDO. You might wanna do this: for ($i = 0; $i < count($tijdlijn); $i++) print_r ($tijdlijn[$i][‘bericht’]); Or in a better way: foreach ($tijdlijn as $tijd) print_r ($tijd[‘bericht’]); 0 solved How to show all arrays without numbers etc

[Solved] Does the stream operator exist for class member functions?

It can be done easily like this: #include <iostream> class A { public: std::ostream &debug() const { std::cerr << “[timestamp]” << “[DEBUG]”; return std::cerr; } }; int main() { A a; a.debug() << “Test”; } But the important question here is: Should we implement it in this way? In my opinion, NO! Because you are … Read more

[Solved] PHP inheritance constructor function didn’t work

You need to update __construct function of constractemp class for then call parent::__construct to set first and last name. <?php class baseemp { protected $firstname; protected $lastname; public function getfullname() { return $this->firstname .”. $this->lastname; } public function __construct($first,$last) { $this->firstname=”$first”; $this->lastname=”$last”; } } class fulltimeemp extends baseemp { public $monthlysal; public function monthlysalary() { … Read more

[Solved] Why some C API doesn’t follow Encapsulation

Consider the following two API variants: struct point get_location(const foo *f) { struct point p; p.x = f->something_x; p.y = f->something_y; return p; } versus: double get_location_x(const foo *f) { return f->something_x; } double get_location_y(const foo *f) { return f->something_y; } I claim there is nothing “more encapsulated” about the latter than the former. It’s … Read more

[Solved] Inheritance – Tricky OOP Concepts

This is actually easy to test However Static Constructors (C# Programming Guide) A static constructor is used to initialize any static data, or to perform a particular action that needs to be performed once only. It is called automatically before the first instance is created or any static members are referenced. Static constructor is called … Read more

[Solved] Interface vs Abstract Class (general OO)

While your question indicates it’s for “general OO”, it really seems to be focusing on .NET use of these terms. In .NET (similar for Java): interfaces can have no state or implementation a class that implements an interface must provide an implementation of all the methods of that interface abstract classes may contain state (data … Read more

[Solved] What is the correct fix instead of using if ( variable != null ) to bypass the origin of issue [closed]

If there’s really a business reason to cater for the situation where your variable is null, then you the developer should provide an else block. Concerning literature, yes there is actually a performance cost to throwing exceptions, so it’s recommended you avoid your app throwing exceptions as much as possible. You can read more about … Read more