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What is the difference between association, aggregation and composition?
What is the difference between association, aggregation, and composition?
Please explain in terms of implementation.
19 An...
How do servlets work? Instantiation, sessions, shared variables and multithreading
...ervlets. For information passing among those servlets I am setting session and instance variables.
8 Answers
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How to check whether dynamically attached event listener exists or not?
...);
}
Creating special attribute for an element when listener is attached and then checking if it exist.
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Difference between JSONObject and JSONArray
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When you are working with JSON data in Android, you would use JSONArray to parse JSON which starts with the array brackets. Arrays in JSON are used to organize a collection of related items (Which could be JSON objects).
For example: [{"name":"item 1"},{"name": "...
int a[] = {1,2,}; Weird comma allowed. Any particular reason?
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It makes it easier to generate source code, and also to write code which can be easily extended at a later date. Consider what's required to add an extra entry to:
int a[] = {
1,
2,
3
};
... you have to add the comma to the existing line and add a new line....
How to use multiple arguments for awk with a shebang (i.e. #!)?
...sr/bin/gawk" "--re-interval" "-f" "$0" "$@", but awk treated that as a command and printed out every line of input unconditionally. That is why I put in the arbitrary_long_name==0 - it's supposed to fail all the time. You could replace it with some gibberish string. Basically, I was looking for a fa...
Zoom in on a point (using scale and translate)
...the change in the zoom. The zoom point is simply the point in the old zoom and the new zoom that you want to remain the same. Which is to say the viewport pre-zoomed and the viewport post-zoomed have the same zoompoint relative to the viewport. Given that we're scaling relative to the origin. You ca...
What's the difference between RouteLink and ActionLink in ASP.NET MVC?
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Action and Routes don't have to have a 1:1 relationship.
ActionLink will generate the URL to get to an action using the first matching route by action name.
RouteLink will generate a URL to a specific route determined either by na...
What is the relationship between UIView's setNeedsLayout, layoutIfNeeded and layoutSubviews?
... on the relationship between UIView's setNeedsLayout , layoutIfNeeded and layoutSubviews methods? And an example implementation where all three would be used. Thanks.
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What is Data Transfer Object?
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A Data Transfer Object is an object that is used to encapsulate data, and send it from one subsystem of an application to another.
DTOs are most commonly used by the Services layer in an N-Tier application to transfer data between itself and the UI layer. The main benefit here is that it reduc...