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How to convert a byte array to a hex string in Java?
...ew String(hexChars);
}
My own tiny benchmarks (a million bytes a thousand times, 256 bytes 10 million times) showed it to be much faster than any other alternative, about half the time on long arrays. Compared to the answer I took it from, switching to bitwise ops --- as suggested in the discussio...
How do you design object oriented projects? [closed]
...ne mother." It's usually harder to figure out relationships describing run-time interactions between objects. You're program's algorithms are at least as important as your objects, and they're much easier to design if you've spelled out what each class's job is.
Once you've got that minimal set of ...
Benefits of using the conditional ?: (ternary) operator
... I always start out with a simple one and make it more complex over time until it is completely unreadable.
– Jouke van der Maas
Jul 22 '10 at 20:39
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How to detect input type=file “change” for the same file?
... Doing so with .change event it works if the user changes the file every time.
19 Answers
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Function in JavaScript that can be called only once
I need to create a function which can be executed only once, in each time after the first it won't be executed. I know from C++ and Java about static variables that can do the work but I would like to know if there is a more elegant way to do this?
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What is the difference between Serializable and Externalizable in Java?
What is the difference between Serializable and Externalizable in Java?
11 Answers
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Connection timeout for SQL server
Can I increase the timeout by modifying the connection string in the web.config ?
3 Answers
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How to “return an object” in C++?
...hat can be done is put it in a smart pointer. (This should be done all the time anyway) Then you don't worry about deleting anything, things are exception-safe, etc. The only problem is it's likely slower than returning by value anyway!
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How do short URLs services work?
...hich maps to their database. In the database, they find a description (sometimes), your name (sometimes) and the real URL. Then they issue a redirect, which is a HTTP 302 response and the target URL in the header.
This direct redirect is important. If you were to use files or first load HTML and th...
What is the performance cost of having a virtual method in a C++ class?
...ic (not virtual) branches and fetch those instructions into cache ahead of time. My PPC does not, but maybe Intel's most recent hardware does.
My timings control for the influence of icache misses on execution (deliberately, since I was trying to examine the CPU pipeline in isolation), so they dis...