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Can a java file have more than one class?
...can. However, there can only be one public top-level class per .java file, and public top-level classes must have the same name as the source file.
The purpose of including multiple classes in one source file is to bundle related support functionality (internal data structures, support classes, etc...
Is there any way to call a function periodically in JavaScript?
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I upvoted and then decided to rescind my upvote (but not downvote) because you are using a string argument to setInterval. Functions should almost always be used in favor of a string argument, for efficiency, security, and for their cl...
Check if object is file-like in Python
...ts are objects in Python that behave like a real file, e.g. have a read() and a write method(), but have a different implementation. It is and realization of the Duck Typing concept.
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What is “Orthogonality”?
...em would be a radio, where changing the station does not change the volume and vice-versa.
A non-orthogonal system would be like a helicopter where changing the speed can change the direction.
In programming languages this means that when you execute an instruction, nothing but that instruction ...
How can I initialize a String array with length 0 in Java?
...you can use:
private static final String[] EMPTY_ARRAY = new String[0];
and then just return EMPTY_ARRAY each time you need it - there's no need to create a new object each time.
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How to use a link to call JavaScript?
...rst one scrolls you to the top of the page.
– Matt Grande
Mar 27 '09 at 1:39
7
Yep it definitely ...
What's the hardest or most misunderstood aspect of LINQ? [closed]
... fair amount of attention to, based on what people may find hard to understand, or what they may have a mistaken impression of. I won't be specifically talking about LINQ to SQL or the Entity Framework except as examples of how queries can be executed remotely using expression trees (and usually...
Removing carriage return and new-line from the end of a string in c#
How do I remove the carriage return character (\r) and the new line character (\n) from the end of a string?
12 Answers
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Is null an Object?
...case - any method invocation on a null results in a NullPointerException.
And this is what the Java Language Specification has to say on this topic:
There is also a special null type, the
type of the expression null, which has
no name. Because the null type has no
name, it is impossible t...
How to determine if a type implements a specific generic interface type
...plements(IBar), or even better, using a keyword "is" .... I'm exploring c# and I'm a more then bit disappointed in .net right now ...
– Sofija
Mar 5 '12 at 22:12
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