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Database Structure for Tree Data Structure
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Have a look at Managing Hierarchical Data in MySQL. It discusses two approaches for storing and managing hierarchical (tree-like) data in a relational database.
The first approach is the adjacency list model, which is what you essentially describe: having a foreign key...
Changing the default header comment license in Xcode
...erty list file named IDETemplateMacros.plist
Add a FILEHEADER value to the Root and set its string value with your copyright text like Copyright © 2017 ...
Copy the file to one of the following locations
For a single project and user
<ProjectName>.xcodeproj/xcuserdata/[username].xcuserdatad...
Set folder browser dialog start location
...
Note that it's required to set RootFolder to Environment.SpecialFolder.Desktop or this may not work.
– Mike Lowery
Nov 24 '14 at 21:02
3...
How to execute a Python script from the Django shell?
...INGS_MODULES right (e.g. if you have a script sitting just above your site root you can do os.environ['DJANGO_SETTINGS_MODULE'] = 'mysite.settings').
– mgalgs
Mar 26 '14 at 5:49
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Change project name on Android Studio
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This did the trick for me:
Close Android Studio
Change project root directory name
Open Android Studio
Open the project (not from local history but by browsing to it)
Clean project
If your settings.gradle contains the below line, either delete it or update it to the new name.
rootProj...
Update all values of a column to lowercase
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See http://dev.mysql.com/doc/refman/5.0/en/string-functions.html#function_lower
UPDATE table_name SET tag = LOWER(tag)
share
|
improve t...
How to find out which version of the .NET Framework an executable needs to run?
...target framework of an assembly. After loading the assembly, click on the root of the assembly node, and you can find the information under the TargetFramework declaration:
[assembly: TargetFramework(".NETFramework,Version=v4.5", FrameworkDisplayName = ".NET Framework 4.5")]
...
Why does the order in which libraries are linked sometimes cause errors in GCC?
...llowing scenario:
myprog.o - containing main() function, dependent on libmysqlclient
libmysqlclient - static, for the sake of the example (you'd prefer the shared library, of course, as the libmysqlclient is huge); in /usr/local/lib; and dependent on stuff from libz
libz (dynamic)
How do we link...
java.lang.NoClassDefFoundError: org/hamcrest/SelfDescribing
...JECT_NAME].iml
Replaced:
<library>
<CLASSES>
<root url="jar://$APPLICATION_HOME_DIR$/lib/junit-4.11.jar!/" />
</CLASSES>
<JAVADOC />
<SOURCES />
</library>
By:
<library name="JUnit4">
<CLASSES>
<root ...
Using OpenSSL what does “unable to write 'random state'” mean?
...appening seems to be that the .rnd file in your home directory is owned by root rather than your account. The quick fix:
sudo rm ~/.rnd
For more information, here's the entry from the OpenSSL FAQ:
Sometimes the openssl command line utility does not abort with a "PRNG not seeded" error messag...