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Unique fields that allow nulls in Django
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For my project, I dumped this into an extras.py file that lives in the root of my site, then I can just from mysite.extras import CharNullField in my app's models.py file. The field acts just like a CharField - just remember to set blank=True, null=True when declaring the field, or otherwise Dj...
JPA eager fetch does not join
...be fetched in any one of the ways given below
SELECT => one query for root entities + one query for related mapped entity/collection of each root entity = (n+1) queries
SUBSELECT => one query for root entities + second query for related mapped entity/collection of all root entities retrieved...
Version vs build in Xcode
...ps if you want to write your version/build numbers to your Settings.bundle/Root*.plist file(s).
This is extended from the how-to article here.
In Xcode 4.2 - 5.0:
Load your Xcode project.
In the left hand pane, click on your project at the very top of the hierarchy. This will load the project se...
Reference — What does this symbol mean in PHP?
...LE__). This directory name does not have a trailing slash unless it is the root directory. (Added in PHP 5.3.0.)
__FUNCTION__: The function name. (Added in PHP 4.3.0) As of PHP 5 this constant returns the function name as it was declared (case-sensitive). In PHP 4 its value is always lowercased.
_...
程序员保值的4个秘密 - 杂谈 - 清泛网 - 专注C/C++及内核技术
...易理解的，它是说我们要从用户的角度来思考这个产品该如何设计，因为产品好不好用最终由用户说了算。如果你在实现产品时也能站在用户的角度来思考，斤斤计较一个功能是否符合应用场景、是否与用户的行为特点吻合、是...
What in the world are Spring beans?
...e put the annotations in the Java file then Spring automatically scan the root-context where java configuration file, make it and put into the bag of Spring.
Here is the detail URI where you got more information about Beans
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How to solve the error LNK2019: unresolved external symbol - function?
...b', although location of both 'MyProject' and 'MyTestProject' kept in same root folder.
– Pabitra Dash
Aug 24 '18 at 10:58
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What is “android:allowBackup”?
...y don't even know what is adb , and if they do , they probably know how to root their device and get the data by themselves anyway , no ?
– android developer
Dec 10 '12 at 19:36
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Correct file permissions for WordPress [closed]
...wned by the user account used
by the web server process.
/
The root WordPress directory: all files should be writable only by your user account, except .htaccess if you want WordPress to
automatically generate rewrite rules for you.
/wp-admin/
The WordPress administration are...
Storing money in a decimal column - what precision and scale?
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For Mysql, I recommend storing the integer (2500) as a bigint if you intend on sorting by the amount. And don't waste your time with PHP 32bit when dealing with big integers, upgrade to 64bit or Node.JS ;)
–...