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In SQL, what's the difference between count(column) and count(*)?
I have the following query:
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Server.UrlEncode vs. HttpUtility.UrlEncode
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HttpServerUtility.UrlEncode will use HttpUtility.UrlEncode internally. There is no specific difference. The reason for existence of Server.UrlEncode is compatibility with classic ASP.
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What is the meaning of “this” in Java?
Normally, I use this in constructors only.
21 Answers
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Standard deviation of a list
I want to find mean and standard deviation of 1st, 2nd,... digits of several (Z) lists. For example, I have
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How to prevent ENTER keypress to submit a web form?
How do you prevent an ENTER key press from submitting a form in a web-based application?
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Operator precedence with Javascript Ternary operator
I cant seem to wrap my head around the first part of this code ( += ) in combination with the ternary operator.
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Why should I declare a virtual destructor for an abstract class in C++?
...know it is a good practice to declare virtual destructors for base classes in C++, but is it always important to declare virtual destructors even for abstract classes that function as interfaces? Please provide some reasons and examples why.
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How to add a touch event to a UIView?
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In iOS 3.2 and higher, you can use gesture recognizers. For example, this is how you would handle a tap event:
//The setup code (in viewDidLoad in your view controller)
UITapGestureRecognizer *singleFingerTap =
[[UITapGes...
Do the parentheses after the type name make a difference with new?
If 'Test' is an ordinary class, is there any difference between:
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How can I concatenate two arrays in Java?
I need to concatenate two String arrays in Java.
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