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How to get the first non-null value in Java?
Is there a Java equivalent of SQL's COALESCE function? That is, is there any way to return the first non-null value of several variables?
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Most common way of writing a HTML table with vertical headers?
Hi all it's been a while since I've asked something, this is something that has been bothering me for a while, the question itself is in the title:
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Why can't non-default arguments follow default arguments?
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Assign output of a program to a variable using a MS batch file
I need to assign the output of a program to a variable using a MS batch file.
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HashSet versus Dictionary w.r.t searching time to find if an item exists
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List files by last edited date
I have a directory: /home/user/
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FIND_IN_SET() vs IN()
I have 2 tables in my database. One is for orders, and one is for companies.
6 Answers
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How can I pair socks from a pile efficiently?
Yesterday I was pairing the socks from the clean laundry and figured out the way I was doing it is not very efficient. I was doing a naive search — picking one sock and "iterating" the pile in order to find its pair. This requires iterating over n/2 * n/4 = n 2 /8 socks on average.
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Wrapping synchronous code into asynchronous call
I have a method in ASP.NET application, that consumes quite a lot of time to complete. A call to this method might occur up to 3 times during one user request, depending on the cache state and parameters that user provides. Each call takes about 1-2 seconds to complete. The method itself is synchron...