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When to use EntityManager.find() vs EntityManager.getReference() with JPA
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I usually use getReference method when i do not need to access database state (I mean getter method). Just to change state (I mean setter method). As you should know, getReference returns a proxy object which uses a powerful featu...
How to force Chrome browser to reload .css file while debugging in Visual Studio?
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Such as src="/css/styles.css?v={random number/string}"
If you're using php or another server-side language, you can do this automatically with time(). So it would be styles.css?v=<?=time();?>
This way, the query string will be new every single time. Like I said, there are much more compli...
CUDA incompatible with my gcc version
I have troubles compiling some of the examples shipped with CUDA SDK.
I have installed the developers driver (version 270.41.19) and the CUDA toolkit,
then finally the SDK (both the 4.0.17 version).
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After Installing Java JDK 7 For Mac OS X - mvn -version still shows java version 1.6.0_31
...e meantime, if you alter the /usr/bin/mvn script as shown in the comments & patch on that issue you will get the desired result.
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scp with port number specified
...nd non-option arguments).
So, in effect, this is how getopt(1) sees the example presented with the end of the options and the beginning of the parameters demarcated by succeeding text bing in gray:
scp -P80 -r some_directory -P 80 ...
This has nothing to do with scp behavior and everything to do ...
rails simple_form - hidden field - create?
... then just use Rails' hidden_field form builder since Simple Form inherits all the form builder methods.
– scarver2
Nov 4 '14 at 1:18
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android get all contacts
... ((cur != null ? cur.getCount() : 0) > 0) {
while (cur != null && cur.moveToNext()) {
String id = cur.getString(
cur.getColumnIndex(ContactsContract.Contacts._ID));
String name = cur.getString(cur.getColumnIndex(
Cont...
How do I remove a single file from the staging area (undo git add)?
... contrary to every advice I've gotten anywhere (man pages, here, friends, &c). I keep thinking some day it's going to do what's advertised, but no.
– rektide
Jun 27 '13 at 23:34
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Where can I set environment variables that crontab will use?
...tes the non-Cron version of the command from my home directory. So, for example, my 'weekday' command looks like:
: "@(#)$Id: weekday.sh,v 1.10 2007/09/17 02:42:03 jleffler Exp $"
#
# Commands to be done each weekday
# Update ICSCOPE
n.updics
The 'daily' command is simpler:
: ...
Can I use __init__.py to define global variables?
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One catch with the example is if you import mymodule.py in __init__.py before MY_CONSTANT = 42 that will fail because when importing mymodule.py MY_CONSTANT hasn't been defined yet. So need to move MY_CONSTANT = 42 above import mymodule
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