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What is a wrapper class?
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In general, a wrapper class is any class which "wraps" or "encapsulates" the functionality of another class or component. These are useful by providing a level of abstraction from the implementation of the underlying class or component; for example, wrapper classes that wrap COM...
Array.Copy vs Buffer.BlockCopy
... Should you use it at any time when you are copying primitive type arrays, or should you only use it if you're coding for performance? Is there anything inherently dangerous about using Buffer.BlockCopy over Array.Copy ?
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Common programming mistakes for Clojure developers to avoid [closed]
...leading zeros to maintain proper rows and columns. Mathematically this is correct, since leading zero obviously don't alter the underlying value. Attempts to define a var with this matrix, however, would fail mysteriously with:
java.lang.NumberFormatException: Invalid number: 08
which totally baf...
Error: The processing instruction target matching “[xX][mM][lL]” is not allowed
This error,
7 Answers
7
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Why do we need Abstract factory design pattern?
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Abstract Factory is a very central design pattern for Dependency Injection (DI). Here's a list of Stack Overflow questions where application of Abstract Factory has been accepted as the solution.
To the best of my understanding, these qu...
How can I find WPF controls by name or type?
I need to search a WPF control hierarchy for controls that match a given name or type. How can I do this?
18 Answers
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Why does Java have transient fields?
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The transient keyword in Java is used to indicate that a field should not be part of the serialization (which means saved, like to a file) process.
From the Java Language Specification, Java SE 7 Edition, Section 8.3.1.3. transient Fields:
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What is going wrong when Visual Studio tells me “xcopy exited with code 4”
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Xcopy exit code 4 means "Initialization error occurred. There is not enough memory or disk space, or you entered an invalid drive name or invalid syntax on the command line."
It looks like Visual Studio is supplying invalid arguments to xcopy. Check your post-build e...
Should I use string.isEmpty() or “”.equals(string)?
...turn false if it's null), which you seem to not care about. If you're not worried about s being null (or are otherwise checking for it), I would definitely use s.isEmpty(); it shows exactly what you're checking, you care whether or not s is empty, not whether it equals the empty string
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How does JavaScript .prototype work?
... head around this prototype-based programming, does any one know how this works?
26 Answers
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