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emacs/elisp: What is the hash (pound, number sign, octothorp) symbol used for?

... circular structures. See the docs for Read Syntax for Circular Objects. And then you have its use for denoting the base for integers, e.g. #x2c -> 44. Plus more I'm sure. share | improve this...
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Convert JsonNode into POJO

...thing else. If your object coming in has more properties than the POJO has and you just want to ignore the extras you'll want to set this: objectMapper.configure(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES, false); Or you'll get an error that it can't find the property to set int...
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Is there anything like .NET's NotImplementedException in Java?

...Wallau I saw this: docs.oracle.com/javase/7/docs/api/java/lang/… There stands that this class is a member of the Java Collection Framework. – L.Butz Jul 11 '12 at 10:56 ...
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Use NUnit Assert.Throws method or ExpectedException attribute?

...ype being thrown in another method call. Here, you target the exact method and not the whole test. Even though your test should call very little code, you're never too safe. Especially when code becomes complex and/or exception too generic. Stuff like "ArgumentNullExceptions" can be thrown a lot and...
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Use of “this” keyword in formal parameters for static methods in C#

...ing" support popular within dynamic languages today with the performance and compile-time validation of strongly-typed languages. Extension Methods enable a variety of useful scenarios, and help make possible the really powerful LINQ query framework... . it means that you can call MyC...
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C++: variable 'std::ifstream ifs' has initializer but incomplete type

...is is pretty noobish, but I'm pretty new to C++. I'm trying to open a file and read it using ifstream : 1 Answer ...
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MySQL Select minimum/maximum among two (or more) given values

... You can use LEAST and GREATEST function to achieve it. SELECT GREATEST(A.date0, B.date0) AS date0, LEAST(A.date1, B.date1) AS date1 FROM A, B WHERE B.x = A.x Both are described here http://dev.mysql.com/doc/refman/5.0/en/comparison-...
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ImportError: No module named pip

... OMG thank you! I have a vagrant box spun up with python 3 and was wondering why pip commands where not working when I installed pip via 'sudo apt-get install python-pip'. These versioning changes (i.e. like php with homebrew) drive me crazy sometimes... – Ryan ...
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Testing if object is of generic type in C#

...of inheritance. If, along the way, you have a base with both a base class and the interface you're looking for, this goes down the class path only. – Groxx Mar 18 '11 at 23:41 1 ...
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How do I explicitly specify a Model's table-name mapping in Rails?

I have a Model class called Countries and I want it to map to a DB table called 'cc'. 2 Answers ...