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Is 'switch' faster than 'if'?
... versa" - any support for this assertion? a compiler might assume that the order of your if clauses has already been hand-tuned to match frequency and relative performance needs, where as a switch is traditionally seen as an open invitation to optimise however the compiler chooses. Good point re ju...
How to store a list in a column of a database table
...re designed specifically to store one value per row/column combination. In order to store more than one value, you must serialize your list into a single value for storage, then deserialize it upon retrieval. There is no other way to do what you're talking about (because what you're talking about is...
Remote JMX connection
....0.1, 127.0.1.1 or localhost it will not work and you will have to update /etc/hosts file.
hostname -i
Here is the command needed to enable JMX even from outside
-Dcom.sun.management.jmxremote
-Dcom.sun.management.jmxremote.authenticate=false
-Dcom.sun.management.jmxremote.ssl=false
-Dcom.su...
Get an array of list element contents in jQuery
...
Does jQuery guarantee an order to the elements returned by the query? I would assume that the order returned is the same as the ordering in the DOM (ie text1, text2, text3), but I don't know what to look for in the documentation to see if this is tru...
Python, compute list difference
...
If the order does not matter, you can simply calculate the set difference:
>>> set([1,2,3,4]) - set([2,5])
set([1, 4, 3])
>>> set([2,5]) - set([1,2,3,4])
set([5])
...
When to use EntityManager.find() vs EntityManager.getReference() with JPA
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So before transaction commit, JPA provider will see stateChanged flag in order to update OR NOT person entity. If no rows is updated after update statement, JPA provider will throw EntityNotFoundException according to JPA specification.
regards,
...
Single Page Application: advantages and disadvantages [closed]
...ld also
work with any updates in data like notifications, profile update etc
An alternate perspective: Aside from your website, will your project
involve a native mobile app? If yes, you are most likely going to be
feeding raw data to that native app from a server (ie JSON) and doing
cl...
List of tables, db schema, dump etc using the Python sqlite3 API
...
You can fetch the list of tables and schemata by querying the SQLITE_MASTER table:
sqlite> .tab
job snmptarget t1 t2 t3
sqlite> select name from sqlite_master where type = 'table';
job
t1
t2
s...
Best approach for GPGPU/CUDA/OpenCL in Java?
...re implemented in CUDA and JNI wrapped (FFT, some linear algebra methods.. etc etc..).
On the other hand OpenCL is just an API. OpenCL kernels are plain strings passed to the API so using OpenCL from Java you should be able to specify your own kernels. OpenCL binding for java can be found here htt...
Is it possible to focus on a using JavaScript focus() function?
...
Yes - this is possible. In order to do it, you need to assign a tabindex...
<div tabindex="0">Hello World</div>
A tabindex of 0 will put the tag "in the natural tab order of the page". A higher number will give it a specific order of pri...