I banged my head on this for a few hours, but the solution seems obvious in retrospect. First I present the solution, then I compare it to prior approaches. (Tested in Typescript 2.6.2.) // WORKING SOLUTION: union of types with type checks class MustBeThis { method1() { } } class OrThis { method2() { } … Read more
This can also happen when you have not initialized your class “world” as public you should do : public class world Instead of : class world
There are lots of different ways that you could achieve this. I’m going to list one of several possible solutions. I would propose using several different layers of protection to prevent users from running the commands that they shouldn’t be allowed to access. All of the directions here assume that users have their own /home/[username] … Read more
Guido’s take on it: I thought about this last night, and realized that you shouldn’t be allowed to subclass bool at all! A subclass would only be useful when it has instances, but the mere existance of an instance of a subclass of bool would break the invariant that True and False are the only … Read more
Browsers impose a per-domain limit of 6-8 connections when using HTTP/1.1, depending on the browser implementation. This allows at most 6-8 concurrent requests per domain. With HTTP/2, browsers open only 1 connection per domain. However, thanks to the multiplexing feature of the HTTP/2 protocol, the number of concurrent requests per domain is not limited to … Read more
Your question is somewhat unclear. Assuming “Category” is a root entity and “2,3” are ids (or values of some property of the category”) you can exclude them using the following: Criteria criteria = …; // obtain criteria from somewhere, like session.createCriteria() criteria.add( Restrictions.not( // replace “id” below with property name, depending on what you’re filtering … Read more
To add attributes you have to derive by extension, to add facets you have to derive by restriction. Therefore this has to be done in two steps for the element’s child content. The attribute can be defined inline: <xsd:simpleType name=”timeValueType”> <xsd:restriction base=”xsd:token”> <xsd:pattern value=”\d{2}:\d{2}”/> </xsd:restriction> </xsd:simpleType> <xsd:complexType name=”timeType”> <xsd:simpleContent> <xsd:extension base=”timeValueType”> <xsd:attribute name=”format”> <xsd:simpleType> <xsd:restriction … Read more
static members belong to the class instead of a specific instance. It means that only one instance of a static field exists[1] even if you create a million instances of the class or you don’t create any. It will be shared by all instances. Since static methods also do not belong to a specific instance, … Read more