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Database Structure for Tree Data Structure
...o-nested-sets
There are other models as well, including materialized path and nested sets:
http://communities.bmc.com/communities/docs/DOC-9902
Joe Celko has written a book on this subject, which is a good reference from a general SQL perspective (it is mentioned in the nested set article link abo...
Delete all Duplicate Rows except for One in MySQL? [duplicate]
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Editor warning: This solution is computationally inefficient and may bring down your connection for a large table.
NB - You need to do this first on a test copy of your table!
When I did it, I found that unless I also included AND n1.id <> n2.id, it deleted every row in the ta...
How to set timeout on python's socket recv method?
...the socket no non-blocking? I don't think that matters to the select call (and it blocks until a descriptor can be read or the timeout expires in this case) and the recv() won't block if the select is satisfied. I tried it using recvfrom() and it seems to work correctly without setblocking(0).
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How to close a Java Swing application from the code
What is the proper way to terminate a Swing application from the code, and what are the pitfalls?
9 Answers
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How can I write a regex which matches non greedy? [duplicate]
...o a trick you can do to work around this: Since \s means "any whitespace", and "\S" means "any non-whitespace", [\s\S] will match ANY character (like ".", but including new line)! Similarly, you could use [\d\D], or [\w\W]. This can be quite a handy little "hack", and it certainly a very useful tric...
shared_ptr to an array : should it be used?
...r delete p, when T is not an array type, shall have well-defined behavior, and shall not throw exceptions.
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Remarks: When T is an array type, this constructor shall not participate in overload resolution unless the expression delete[] p is well-formed and either T is U[N] and Y(*)[N] is conve...
Scanner is skipping nextLine() after using next() or nextFoo()?
I am using the Scanner methods nextInt() and nextLine() for reading input.
19 Answers
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Does Android keep the .apk files? if so where?
After android installs an application from the Marketplace, does it keep the .apk file?
19 Answers
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How to find out which fonts are referenced and which are embedded in a PDF document
...I'd like to inspect, which fonts are actually embedded in the pdf document and which are only referenced. Is there an easy (and cheap as in free) way to do that?
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Value Change Listener to JTextField
... good format for the warning/type cast. Same pattern will be useful for handling double amounts (sales figures/prices entered or displayed)
– Max West
Oct 13 '14 at 14:31
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