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SQL query return data from multiple tables
...or more tables using an inner join (See the wikipedia entry for additional info)
How to use a union query
Left and Right Outer Joins (this stackOverflow answer is excellent to describe types of joins)
Intersect queries (and how to reproduce them if your database doesn't support them) - this is a fun...
In c++ what does a tilde “~” before a function name signify?
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It's the destructor, it destroys the instance, frees up memory, etc. etc.
Here's a description from ibm.com:
Destructors are usually used to deallocate memory and do other cleanup for a class object and its class members when the object is destroyed. A destructor is cal...
Most tricky/useful commands for gdb debugger [closed]
...and then remove the breakpoint
where: Line number currently being executed
info locals: View all local variables
info args: View all function arguments
list: view source
rbreak: break on function matching regular expression
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How to construct a relative path in Java from two absolute paths (or URLs)?
...ion that passed my test cases. I can't guarantee that this solution is bug-free, but it does pass the included test cases. The method and tests I've written depend on the FilenameUtils class from Apache commons IO.
The solution was tested with Java 1.4. If you're using Java 1.5 (or higher) you shou...
What's the fastest way to read a text file line-by-line?
... answered Jul 23 '14 at 13:12
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What is the python “with” statement designed for?
... variable with data until the instructions under it are complete, and then free the variable?
– Musixauce3000
May 20 '16 at 2:16
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What's the best way of implementing a thread-safe Dictionary?
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Unfortunately it's not a lock-free solution, so it's useless in SQL Server CLR safe assemblies. You'd need something like what's described here: cse.chalmers.se/~tsigas/papers/Lock-Free_Dictionary.pdf or perhaps this implementation: github.com/hackcraft/...
Can Selenium interact with an existing browser session?
...browser session. To create that Driver, you only need to know the "session info", i.e. address of the server (local in our case) where the browser is running and the browser session id. To get these details, we can create one browser session with selenium, open the desired page, and then finally run...
is it possible to evenly distribute buttons across the width of an android linearlayout
...th that is greater than 0dp because it has wrap_content instead making the free space left to divide less than 100% because the text takes space. The result will be that they do get 50% of the free space left but the text already took some space so the TextView will have well over 50% of the total s...
Hashset vs Treeset
...eadSet(), and tailSet() etc
Important points:
Both guarantee duplicate-free collection of elements
It is generally faster to add elements to the HashSet and then convert the collection to a TreeSet for a duplicate-free sorted traversal.
None of these implementations are synchronized. That is if ...