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Define: What is a HashSet?
... HashSet holds a set of objects, but in a way that it allows you to easily and quickly determine whether an object is already in the set or not. It does so by internally managing an array and storing the object using an index which is calculated from the hashcode of the object. Take a look here
Hash...
How do I handle too long index names in a Ruby on Rails ActiveRecord migration?
...archable"} in this case the index was in fact a multi-column(searchable_id and searchable_type) and the addition of the namespace in the generated name became very long.
– mkrinblk
Jan 3 '17 at 22:56
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Modifying the “Path to executable” of a windows service
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There is also this approach seen on SuperUser which uses the sc command line instead of modifying the registry:
sc config <service name> binPath= <binary path>
Note: the space after binPath= is important. You can also query the current configuration using:
sc qc <service na...
Variable's scope in a switch case [duplicate]
I think I don't understand how the scope works in a switch case.
7 Answers
7
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How do I see a C/C++ source file after preprocessing in Visual Studio?
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cl.exe, the command line interface to Microsoft Visual C++, has three different options for outputting the preprocessed file (hence the inconsistency in the previous responses about Visual C++):
/E: preprocess to stdout (similar to GCC's -...
How do you move a file?
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Check out section 5.14.2. Moving files and folders (or check out "move" in the Index of the help) of the TortoiseSVN help. You do a move via right-dragging. It also mentions that you need to commit from the parent folder to make it "one" revision. This works for d...
Putting license in each code file? [closed]
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It's reasonable and sensible to identify which license each source file was released under, because the file might be separated from the rest of the code (reuse - encouraged, in general, by Open Source), and if the file contains no informati...
What is a mixin, and why are they useful?
...ming Python ", Mark Lutz mentions "mixins". I'm from a C/C++/C# background and I have not heard the term before. What is a mixin?
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DateTime2 vs DateTime in SQL Server
...datetime2. Here is their recommendation:
Use the time, date, datetime2 and
datetimeoffset data types for new
work. These types align with the SQL
Standard. They are more portable.
time, datetime2 and datetimeoffset
provide more seconds precision.
datetimeoffset provides time zone
s...
C++: what regex library should I use? [closed]
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Boost.Regex is very good and is slated to become part of the C++0x standard (it's already in TR1).
Personally, I find Boost.Xpressive much nicer to work with. It is a header-only library and it has some nice features such as static regexes (regexes ...