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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 ...
DataTable: Hide the Show Entries dropdown but keep the Search box
...
"searching": false, // Search Box will Be Disabled
"ordering": false, // Ordering (Sorting on Each Column)will Be Disabled
"info": true, // Will show "1 to n of n entries" Text at bottom
"lengthChange": false // Will Disabled Record number per page
...
How to identify server IP address in PHP
... @andreas It shouldn't. The local hostname should be in the /etc/hosts file and will be fast - although it might just be 127.0.0.1. If it does have to call DNS then it will be slow like you say.
– Ariel
Feb 12 '15 at 10:39
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Safe integer parsing in Ruby
...f the string matches a pattern first. Like the /\d+/ regular expressions, etc.
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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,...
Why are variables “i” and “j” used for counters?
... real. This meant that I was the first integer variable, and J the second, etc., so they fell towards use in loops.
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answered Nov 9 '10 at 19:48
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Proper use of the IDisposable interface
...e created needs to expose some method, that the outside world can call, in order to clean up unmanaged resources. The method can be named whatever you like:
public void Cleanup()
or
public void Shutdown()
But instead there is a standardized name for this method:
public void Dispose()
There ...
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...
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 ...
Calling C/C++ from Python?
...ntrusively, so that you should not have to change the C++ code at
all in order to wrap it, making Boost.Python ideal for exposing
3rd-party libraries to Python. The library's use of advanced
metaprogramming techniques simplifies its syntax for users, so that
wrapping code takes on the look o...