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Why can templates only be implemented in the header file?
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Caveat: It is not necessary to put the implementation in the header file, see the alternative solution at the end of this answer.
Anyway, the reason your code is failing is that, when instantiating a template, the compiler creates a...
What is an ORM, how does it work, and how should I use one? [closed]
...ect that I'm designing, but I'm having trouble finding information on what it is or how it works.
5 Answers
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Unit testing private methods in C#
Visual Studio allows unit testing of private methods via an automatically generated accessor class. I have written a test of a private method that compiles successfully, but it fails at runtime. A fairly minimal version of the code and the test is:
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How to check if an object is nullable?
...ullable - Nullable<T> and reference-type.
Jon has corrected me that it is hard to get type if boxed, but you can with generics:
- so how about below. This is actually testing type T, but using the obj parameter purely for generic type inference (to make it easy to call) - it would work almos...
Why are only a few video games written in Java? [closed]
... aren't many commercial, 3D video games (not random open source 2D ones) written in Java? In theory, it makes a lot of sense: you get a productivity boost and a cross-platform application almost for free, among other things, such as the vast amount of Java libraries, and built-in garbage collection ...
What does the restrict keyword mean in C++?
...Ericson says that while restrict is not part of the C++ standard yet, that it is supported by many compilers and he recommends it's usage when available:
restrict keyword
! New to 1999 ANSI/ISO C standard
! Not in C++ standard yet, but supported by many C++ compilers
! ...
Is it possible to Turn page programmatically in UIPageViewController?
Is it possible to turn page programmatically in UIPageViewController ?
17 Answers
17
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Mod of negative number is melting my brain
I'm trying to mod an integer to get an array position so that it will loop round. Doing i %
arrayLength works fine for positive numbers but for negative numbers it all goes wrong.
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Is Java a Compiled or an Interpreted programming language ?
...the past I have used C++ as a programming language. I know that the code written in C++ goes through a compilation process until it becomes object code "machine code".
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What are Long-Polling, Websockets, Server-Sent Events (SSE) and Comet?
... the client is the browser and the server is the webserver hosting the website.
Before you can understand these technologies, you have to understand classic HTTP web traffic first.
Regular HTTP:
A client requests a webpage from a server.
The server calculates the response
The server sends the re...