definition

What is a “thread” (really)?

由 浪子不回头ぞ 提交于 2019-11-26 08:38:59
问题 I have been trying to find a good definition, and get an understanding, of what a thread really is. It seems that I must be missing something obvious, but every time I read about what a thread is, it\'s almost a circular definition, a la \"a thread is a thread of execution\" or \" a way to divide into running tasks\". Uh uh. Huh? It seems from what I have read that a thread is not really something concrete, like a process is. It is in fact just a concept. From what I understand of the way

Easy to understand definition of “asynchronous event”? [closed]

由 对着背影说爱祢 提交于 2019-11-26 06:34:44
I've encountered this term a lot, and even after Googling, still can't understand what exactly it means. Is there some easy-to-understand (ideally with examples) definition of what an asynchronous event is that someone can provide? Thanks! epascarello Non programming example: Synchronous You want a pizza for dinner and you are out of the frozen kind. So you have to stop playing WOW which upsets your guild. You go to the kitchen, make the dough, cover it with sauce, add the cheese, and smother it your favorite bacon topping. You just spent 20 minutes of your time making the pizza with another

What is the definition of “interface” in object oriented programming

由 一世执手 提交于 2019-11-26 06:11:49
问题 Ok, a friend of mine go back and forth on what \"interface\" means in programming. What is the best description of an \"interface\". To me an interface is a blueprint of a class, is this the best definition? 回答1: An interface is one of the more overloaded and confusing terms in development. It is actually a concept of abstraction and encapsulation. For a given "box", it declares the "inputs" and "outputs" of that box. In the world of software, that usually means the operations that can be

Why are redundant scope qualifications supported by the compiler, and is it legal?

由 元气小坏坏 提交于 2019-11-26 04:52:44
问题 I tested on two compilers, and was surprised to see both support the following definition without complaint: class A { A(); }; A::A::A() {} ^^^ Note that this also succeeds for methods, although it is flagged when the declaration is over-qualified. Questions: Is this a valid C++ program? If so, what purpose does it serve - or is it merely a byproduct? Updated Detail: In case the original question was not clear or too short: I\'m curious why redundant qualifications are permitted on the

What are unit tests, integration tests, smoke tests, and regression tests?

由 余生颓废 提交于 2019-11-26 04:28:41
问题 What are unit tests, integration tests, smoke tests, and regression tests? What are the differences between them and which tools can I use for each of them? For example, I use JUnit and NUnit for unit testing and integration testing. Are there any smoke testing or regression testing tools? 回答1: Unit test : Specify and test one point of the contract of single method of a class. This should have a very narrow and well defined scope. Complex dependencies and interactions to the outside world are

What is a web service endpoint?

由 情到浓时终转凉″ 提交于 2019-11-26 04:02:03
问题 Let\'s say my web service is located at http://localhost:8080/foo/mywebservice and my WSDL is at http://localhost:8080/foo/mywebservice?wsdl . Is http://localhost:8080/foo/mywebservice an endpoint, i.e., is it the same as the URI of my web service or where the SOAP messages received and unmarshalled? Could you please explain to me what it is and what the purpose of it is? 回答1: This is a shorter and hopefully clearer answer... Yes, the endpoint is the URL where your service can be accessed by

What are public, private and protected in object oriented programming?

由 送分小仙女□ 提交于 2019-11-26 03:35:39
问题 What are public, private and protected in object oriented programming? 回答1: They are access modifiers and help us implement Encapsulation (or information hiding). They tell the compiler which other classes should have access to the field or method being defined. private - Only the current class will have access to the field or method. protected - Only the current class and subclasses (and sometimes also same-package classes) of this class will have access to the field or method. public - Any

What's the difference between unit, functional, acceptance, and integration tests? [closed]

由 孤者浪人 提交于 2019-11-26 03:24:19
问题 What is the difference between unit, functional, acceptance, and integration testing (and any other types of tests that I failed to mention)? 回答1: Depending on where you look, you'll get slightly different answers. I've read about the subject a lot, and here's my distillation; again, these are slightly wooly and others may disagree. Unit Tests Tests the smallest unit of functionality, typically a method/function (e.g. given a class with a particular state, calling x method on the class should

Defining static const integer members in class definition

由 那年仲夏 提交于 2019-11-26 03:23:47
问题 My understanding is that C++ allows static const members to be defined inside a class so long as it\'s an integer type. Why, then, does the following code give me a linker error? #include <algorithm> #include <iostream> class test { public: static const int N = 10; }; int main() { std::cout << test::N << \"\\n\"; std::min(9, test::N); } The error I get is: test.cpp:(.text+0x130): undefined reference to `test::N\' collect2: ld returned 1 exit status Interestingly, if I comment out the call to

What is AJAX, really?

由 走远了吗. 提交于 2019-11-26 02:57:10
问题 I have to start using AJAX in a project and I don\'t know where to start. Can someone please help? 回答1: A synchronous J avaScript A nd X ml. A technique for achieving bi-directional, script-driven communications between Web browsers and servers via HTTP. See also: definition on Wikipedia AJAX Introduction on w3schools Ajax Workshop 1 on Ajax Lessons Edit: As pointed out by Nosredna, JSON is often used in place of XML. 回答2: The rough idea in English: You have a web page. Some event (can be a
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