...inted out, by definition, the individual SELECTs making up a UNION are not allowed to contain an ORDER BY clause. The only ORDER BY clause allowed is at the end of the UNION and it applies to the entire UNION, making xxx UNION yyy ORDER BY zzz the eqivalent of (xxx UNION yyy) ORDER BY zzz ...

... to debug some subscriber and when sending a topic the subscriber was not called but when sending to the queue it worked – vmrvictor Jul 23 '19 at 10:25 add a comment ...

I am reading a book called "Teach Yourself C in 21 Days" (I have already learned Java and C# so I am moving at a much faster pace). I was reading the chapter on pointers and the -> (arrow) operator came up without explanation. I think that it is used to call members and functions (like the eq...

... There's no built-in command for it, so I usually just do something like this: #!/bin/bash # history_of_file # # Outputs the full history of a given file as a sequence of # logentry/diff pairs. The first revision of the file is emitted as # full text since there's no...

... I finally figured out how to do this. I just wanted to mention beforehand that I did try to start with a fresh Eclipse install, export the preferences to a .epf file, change just one single setting, export again, and compare the ...

...te path. Converting from a path to a canonical path makes it absolute (usually tack on the current working directory so e.g. ./file.txt becomes c:/temp/file.txt). The canonical path of a file just "purifies" the path, removing and resolving stuff like ..\ and resolving symlinks (on unixes). Also ...

...the browser can understand, and so the browser will simply ignore it. This allows you to put anything in there, which can then be extracted later and used by a templating library to generate HTML snippets. Backbone doesn't force you to use any particular templating library - there are quite a few o...

...ion by client code as it makes no sense to instantiate a static class Make all the members and functions of the class static - Since the class cannot be instantiated no instance methods can be called or instance fields accessed Note that the compiler will not prevent you from declaring an instance ...

... You need to install psycopg2 Python library. Installation Download http://initd.org/psycopg/, then install it under Python PATH After downloading, easily extract the tarball and: $ python setup.py install Or if you wish, install it b...

...oneable is now largely regarded as a mistake (citation below). I would normally want to be able to make implementations of an interface Cloneable but not necessarily make the interface Cloneable (similar to the use of Serializable). This cannot be done without reflection: ISomething i = ... if (i i...