I am new to Java and for the time created an array of objects in Java. I have a class A for example – A[] arr = new A[4]; But this is only creating pointers (references) to A and not 4 objects. Is this correct? I see that when I try to access functions/variables in … Read more
I have this code: private static $dates = array( ‘start’ => mktime( 0, 0, 0, 7, 30, 2009), // Start date ‘end’ => mktime( 0, 0, 0, 8, 2, 2009), // End date ‘close’ => mktime(23, 59, 59, 7, 20, 2009), // Date when registration closes ‘early’ => mktime( 0, 0, 0, 3, 19, 2009), … Read more
I am trying to implement method overloading in Python: class A: def stackoverflow(self): print ‘first method’ def stackoverflow(self, i): print ‘second method’, i ob=A() ob.stackoverflow(2) but the output is second method 2; similarly: class A: def stackoverflow(self): print ‘first method’ def stackoverflow(self, i): print ‘second method’, i ob=A() ob.stackoverflow() gives Traceback (most recent call last): … Read more
I am confused on how to separate implementation and declarations code of a simple class into a new header and cpp file. For example, how would I separate the code for the following class? class A2DD { private: int gx; int gy; public: A2DD(int x,int y) { gx = x; gy = y; } int … Read more
Here is my Transaction class: class Transaction(object): def __init__(self, company, num, price, date, is_buy): self.company = company self.num = num self.price = price self.date = datetime.strptime(date, “%Y-%m-%d”) self.is_buy = is_buy And when I’m trying to run the date function: tr = Transaction(‘AAPL’, 600, ‘2013-10-25′) print tr.date I’m getting the following error: self.date = datetime.strptime(self.d, “%Y-%m-%d”) … Read more
How does one go about and try to find all subclasses of a given class (or all implementors of a given interface) in Java? As of now, I have a method to do this, but I find it quite inefficient (to say the least). The method is: Get a list of all class names that … Read more
I was looking at the Java code for LinkedList and noticed that it made use of a static nested class, Entry. public class LinkedList<E> … { … private static class Entry<E> { … } } What is the reason for using a static nested class, rather than an normal inner class? The only reason I … Read more
I recently got stuck in a situation like this: class A { public: typedef struct/class {…} B; … C::D *someField; } class C { public: typedef struct/class {…} D; … A::B *someField; } Usually you can declare a class name: class A; But you can’t forward declare a nested type, the following causes compilation error. … Read more
I recently watched a Tutorial on Angular 2 with TypeScript, but unsure when to use an Interface and when to use a Model for data structures. Example of interface: export interface IProduct { ProductNumber: number; ProductName: string; ProductDescription: string; } Example of Model: export class Product { constructor( public ProductNumber: number, public ProductName: string, public … Read more
I have an issue in angular.js with directive/class ng-cloak or ng-show. Chrome works fine, but Firefox is causing blink of elements with ng-cloak or ng-show. IMHO it’s caused by the converting ng-cloak/ng-show to style=”display: none;”, probably the Firefox javascript compiler is little bit slower, so the elements appears for a while and then hide? Example: … Read more