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Swapping two variable value without using third variable
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*x ^= *y;
}
}
Why the test?
The test is to ensure that x and y have different memory locations (rather than different values). This is because (p xor p) = 0 and if both x and y share the same memory location, when one is set to 0, both are set to 0.
When both *x and *y are 0, all o...
What is an example of the Liskov Substitution Principle?
...ple (LSP) is a fundamental principle of object oriented design. What is it and what are some examples of its use?
31 Answer...
Modelling an elevator using Object-Oriented Analysis and Design [closed]
There are a set of questions that seem to be commonly-used in interviews and classes when it comes to object-oriented design and analysis. This is one of them; unfortunately, my OOP professor in college never actually gave an answer to it, and so I've been wondering.
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CSS background image alt attribute
...t, this is often recommended where presenting visual icons is more compact and user-friendly than an equivalent list of text blurbs. Any use of image sprites can benefit from this approach.
It is quite common for hotel listings icons to display amenities. Imagine a page which listed 50 hotel and ea...
Implementing two interfaces in a class with same method. Which interface method is overridden?
Two interfaces with same method names and signatures. But implemented by a single class then how the compiler will identify the which method is for which interface?
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Django auto_now and auto_now_add
...Any field with the auto_now attribute set will also inherit editable=False and therefore will not show up in the admin panel. There has been talk in the past about making the auto_now and auto_now_add arguments go away, and although they still exist, I feel you're better off just using a custom save...
What are the implications of using “!important” in CSS? [duplicate]
I've been working on a website for a few months, and a lot of times when I've been trying to edit something, I have to use !important , for example :
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Start / Stop a Windows Service from a non-Administrator user account
I have a WindowsService named, say, BST. And I need to give a non-Administrator user, UserA, the permissions to Start/Stop this particular service. My service runs on a variety of Windows OS, starting from Windows Server 2003 to Windows 7.
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Why are there two kinds of functions in Elixir?
I'm learning Elixir and wonder why it has two types of function definitions:
8 Answers
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Can't start site in IIS (use by another process)
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Check using netstat -aon or netstat -aon | findstr 0.0:80 in a command prompt to see which Process Id is LISTENING to port :80 and then watch for that Process Id (PID) in Task Manager with view->select columns-> process id checked. End that process, restart IIS and you are done. (Note:...