Namespace is a way to implement scope. In Java (or C) the compiler determines where a variable is visible through static scope analysis. In C, scope is either the body of a function or it’s global or it’s external. The compiler reasons this out for you and resolves each variable name based on scope rules. … Read more
This a very simple and fast implementation we developed for a web site we own. We tried to improve the code as much as possible, while keeping it thread safe. I think the code is very simple and clear, but if you need some explanation or a guide related to how to use it, don’t … Read more
Directly from Oracle Docs Package names are written in all lower case to avoid conflict with the names of classes or interfaces.
The following answer is from Gof book (Design Patterns) An object’s class defines how the object is implemented. The class defines object’s internal state and the implementation of its operations. In contrast, an object’s type only refers to its interface – a set of requests to which it can respond. An object can have many … Read more
A list can be found on wikipedia. ALGOL 68 APL AWK CFML COBOL Fortran FoxPro Julia Lua Mathematica MATLAB PL/I Ring RPG Sass Smalltalk Wolfram Language XPath/XQuery
More or less any use of member (ie. nested) types can give rise to a need for dependent method types. In particular, I maintain that without dependent method types the classic cake pattern is closer to being an anti-pattern. So what’s the problem? Nested types in Scala are dependent on their enclosing instance. Consequently, in … Read more
You have context passed as parameter to onRecieve() method, so just use: @Override public void onReceive(Context context, Intent intent) { //start activity Intent i = new Intent(); i.setClassName(“com.test”, “com.test.MainActivity”); i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); context.startActivity(i); } It works, of course you have to change package and activity class name to your own.
For Windows, critical sections are lighter-weight than mutexes. Mutexes can be shared between processes, but always result in a system call to the kernel which has some overhead. Critical sections can only be used within one process, but have the advantage that they only switch to kernel mode in the case of contention – Uncontended … Read more
Not jQuery. Not YUI. Not (etc. etc.) Frameworks may be useful, but they are often hiding the sometimes-ugly details of how JavaScript and the DOM actually work from you. If your aim is to be able to say “I know JavaScript”, then investing a lot of time in a framework is opposed to that. Here … Read more
I know this is going to seem old-fashioned, but I don’t think much of using online tutorials to learn programming languages or platforms. These generally give you no more than a little taste of the language. To really learn a language, you need the equivalent of a “book”, and in many cases, this means a … Read more