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What are valid values for the id attribute in HTML?

... For HTML 4, the answer is technically: ID and NAME tokens must begin with a letter ([A-Za-z]) and may be followed by any number of letters, digits ([0-9]), hyphens ("-"), underscores ("_"), colons (":"), and periods ("."). HTML 5 is even more permissiv...
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How to generate a random number in C++?

... The most fundamental problem of your test application is that you call srand once and then call rand one time and exit. The whole point of srand function is to initialize the sequence of pseudo-random numbers with a random seed. It means that if you pass the same value to srand in two differ...
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Advantage of creating a generic repository vs. specific repository for each object?

... are any major advantages to creating a generic IRepository interface that all repositories implement, vs. each Repository having its own unique interface and set of methods. ...
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Is Python strongly typed?

... Python is strongly, dynamically typed. Strong typing means that the type of a value doesn't change in unexpected ways. A string containing only digits doesn't magically become a number, as may happen in Perl. Every change of type requires an explicit...
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What's a good way to extend Error in JavaScript?

...nvironments set the stack property, but fileName and lineNumber are practically useless to be used in inheritance. So, the minimalistic approach is: function MyError(message) { this.name = 'MyError'; this.message = message; this.stack = (new Error()).stack; } MyError.prototype = new Er...
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Why does Python code use len() function instead of a length method?

...on objects which have a length and use the built-in len() function, which calls it for you, similar to the way you would implement __iter__() and use the built-in iter() function (or have the method called behind the scenes for you) on objects which are iterable. See Emulating container types for m...
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iPhone - Get Position of UIView within entire UIWindow

...If your superView did not have a superView your view should not be seen at all – user4951 Mar 19 '13 at 3:41 17 ...
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possible EventEmitter memory leak detected

... I am using process.on('uncaughtException', callback); – Riz Mar 19 '12 at 10:51 ...
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Delete all tags from a Git repository

I want to delete all the tags from a Git repository. How can I do that? 11 Answers 11 ...
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How to structure a express.js application?

... it. Of those, I think Twitter's matador is structured pretty well. We actually used a very similar approach to how they load up parts of the app. derby.js also looks extremely interesting. It's akin to meteor without all of the hype and actually gives credit where credit is due (notably, node and e...