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JMS and AMQP - RabbitMQ
...Queuing Protocol).
Currently, many Client APIs (e.g., Java, C++, RESTful, etc.) are available to enable the usage of RabbitMQ messaging services.
JMS (Java Messaging Service) is a JCP standard defining a set of structured APIs to be implemented by a MOM. An example of MOM that implements (i.e. is ...
Pointers vs. values in parameters and return values
...eful use of pointers to items, items are small enough to copy efficiently, etc.). Sometimes you have to think about or measure the specifics of your situation, but that's a rough guide.
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What is the difference between getFields and getDeclaredFields in Java reflection
...lements in the array returned are not sorted and are not in any particular order. This method returns an array of length 0 if the class or interface has no accessible public fields, or if it represents an array class, a primitive type, or void.
Specifically, if this Class object represents a class,...
Can I have multiple primary keys in a single table?
...,'lax'),('mammal','whale'),
('bird','ostrich');
SELECT * FROM animals ORDER BY grp,id;
Which returns:
+--------+----+---------+
| grp | id | name |
+--------+----+---------+
| fish | 1 | lax |
| mammal | 1 | dog |
| mammal | 2 | cat |
| mammal | 3 | whale |
| bird ...
Safe integer parsing in Ruby
...f the string matches a pattern first. Like the /\d+/ regular expressions, etc.
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git:// protocol blocked by company, how can I get around that?
... STATE SERVICE
80/tcp open http
9418/tcp filtered git
# Using Netcat:
# Returns 0 if the git protocol port IS NOT blocked
# Returns 1 if the git protocol port IS blocked
$ nc github.com 9418 < /dev/null; echo $?
1
# Using CURL
# Returns an exit code of (7) if the git protocol port IS...
Mercurial Eclipse Plugin
... Its disappointing that you need to sign up at java forge in order to download this plugin
– Chris Gow
Nov 26 '10 at 14:34
6
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Select Pandas rows based on list index
...is will not work if the indexes in your dataframe do not correspond to the order of the rows due to prior computations. In that case use:
df.index.isin([1,3])
... as suggested in other responses.
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Exception thrown inside catch block - will it be caught again?
...{ } catch (Exception e){ System.err.println("In catch Exception: "+e.getClass()); }catch (IOException e){ System.err.println("In catch IOException: "+ e.getClass()); } and the code in try block generates IO Exception, Will it go to the immediate general Exception block or it will fly ove...
How to compile and run C/C++ in a Unix console/Mac terminal?
...gle source program:
make foo
where the source file is foo.c or foo.cpp, etc.
You dont even need a makefile. Make has enough built-in rules to build your source file into an executable of the same name, minus extension.
Running the executable just built is the same as running any program - but y...