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Using Java 8's Optional with Stream::flatMap
The new Java 8 stream framework and friends make for some very concise java code, but I have come across a seemingly-simple situation that is tricky to do concisely.
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Haskell offline documentation?
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Hoogle is available offline, installable from Cabal: http://hackage.haskell.org/package/hoogle
Usage instructions are at http://www.haskell.org/haskellwiki/Hoogle#Command_Line_Search_Flags.
Usage:
$ hoogle --help
Hoogle v4.2.8, (C) Neil Mitchell 2004-2011
http://haskell.org/...
Update multiple rows in same query using PostgreSQL
..._b = '345' THEN 2
END
WHERE column_b IN ('123','345')
And working proof: http://sqlfiddle.com/#!2/97c7ea/1
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How to download HTTP directory with all files and sub-directories as they appear on the online files
There is an online HTTP directory that I have access to. I have tried to download all sub-directories and files via wget . But, the problem is that when wget downloads sub-directories it downloads the index.html file which contains the list of files in that directory without downloading the fil...
Why no ICloneable?
Is there a particular reason why a generic ICloneable<T> does not exist?
9 Answers
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How to map a composite key with JPA and Hibernate?
... name.equals(that.getName()). The first will fail, if that is a proxy.
http://www.laliluna.de/jpa-hibernate-guide/ch06s06.html
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Why is `std::move` named `std::move`?
The C++11 std::move(x) function doesn't really move anything at all. It is just a cast to r-value. Why was this done? Isn't this misleading?
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Run an OLS regression with Pandas Data Frame
...n. We refer to external packages like statsmodels, see some examples here: http://www.statsmodels.org/stable/regression.html
– javadba
Jan 25 '17 at 0:47
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Is there a generic constructor with parameter constraint in C#?
In C# you can put a constraint on a generic method like:
7 Answers
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Why are we not to throw these exceptions?
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