...input. Hint: The alphabet doesn't necessarily have to be of letters. But it has to be of symbols which are atomic for the language understood by parser/lexer. Symbols for the lexer: ASCII characters. Symbols for the parser: the particular tokens, which are terminal symbols of their grammar. They ...

... If null were an Object, it would support the methods of java.lang.Object such as equals(). However, this is not the case - any method invocation on a null results in a NullPointerException. And this is what the Java Language Specification has to sa...

... It's called lazy loading because, like a lazy person, you are putting off doing something you don't want to. The opposite is Eager Loading, where you load something right away, long before you need it. If you are curious wh...

I was under the assumption that REST was a web service but it seems that I am incorrect in thinking this - so, what is REST? ...

... array1.equals(array2) is the same as array1 == array2, i.e. is it the same array. As @alf points out it's not what most people expect. Arrays.equals(array1, array2) compares the contents of the arrays. Similarly array.toString() may not be very useful and you need to use Arrays.toStr...

I've just started using ReSharper with Visual Studio (after the many recommendations on SO). To try it out I opened up a recent ASP.NET MVC project. One of the first and most frequent things I've noticed it suggesting is to change most/all my explicit declarations to var instead. For example: ...

...lue is the empty string and the control is not focused (e.g. by displaying it inside a blank unfocused control). All U+000D CARRIAGE RETURN U+000A LINE FEED character pairs (CRLF) in the hint, as well as all other U+000D CARRIAGE RETURN (CR) and U+000A LINE FEED (LF) characters in the hint, must be ...

What is polymorphism, what is it for, and how is it used? 28 Answers 28 ...

... Not only does it not get executed, it doesn't even get compiled. #if is a preprocessor command, which gets evaluated before the actual compilation step. The code inside that block doesn't appear in the compiled binary. It's often used fo...

... Clone is broken, so dont use it. THE CLONE METHOD of the Object class is a somewhat magical method that does what no pure Java method could ever do: It produces an identical copy of its object. It has been present in the primordial Object s...