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PostgreSQL delete all content
...has the same effect as an unqualified DELETE on each
table, but since it does not actually scan the tables it is faster.
Furthermore, it reclaims disk space immediately, rather than requiring
a subsequent VACUUM operation. This is most useful on large tables.
http://www.postgresql.org/docs/9...
When should an IllegalArgumentException be thrown?
...If preconditions can be described in function documentation, and the class does not intent for invalid input and therefore programmer error is indicated, use IllegalArgumentException. Although not "checked" the "check" moves to the Javadoc documenting the function, which the client is expected to ad...
cmake and libpthread
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This doesn't work when using in a CXX only project. Does anyone know a nice workaround?
– Simon
Nov 29 '11 at 3:46
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How to create a function in a cshtml template?
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Does asp.net core also support the @helper ?
– MuM6oJuM6o
Aug 13 '18 at 18:38
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What data type to use for hashed password field and what length?
... type CHAR(60) to store this encoding of a Bcrypt hash. Note this function doesn't encode as a string of hexadecimal digits, so we can't as easily unhex it to store in binary.
Other hash functions still have uses, but not for storing passwords, so I'll keep the original answer below, written in 200...
How can I show the name of branches in `git log`?
... order to show other stuff as well, such as author and date), but %d there does not give me the colors of --decorate. I use yellow for all my refs for now, do you know how I can let --pretty's %d string inherit the colors of --decorate?
– Gauthier
Mar 18 '15 at...
When should we implement Serializable interface?
...Instances of Serializable classes can be easily transmitted. Serialization does have some security consequences, however. Read Joshua Bloch's Effective Java.
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Dynamic SQL - EXEC(@SQL) versus EXEC SP_EXECUTESQL(@SQL)
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Your takeaway does not stand always. There are occasions when there is no efficiency bonus by using sp_executesql, but you can protect your code from sql injection attack. Sometimes you just can't use sp_executesql the way you can use exec...
Weighted random numbers
...aw from than the C++11 because it can't use binary search.
To see that it does this, you can see the relevant lines (/usr/include/c++/5/bits/random.tcc on my Ubuntu 16.04 + GCC 5.3 install):
template<typename _IntType>
void
discrete_distribution<_IntType>::param_type::
_...
Get pandas.read_csv to read empty values as empty string instead of nan
...pandas' default NA values should be replaced or appended to. The OP's code doesn't work currently just because it's missing this flag. For this example, you could use pandas.read_csv('test.csv',na_values=['nan'], keep_default_na=False).
– Michael Delgado
Sep 30...