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SQL update trigger only when column is modified
... edited Jan 28 '15 at 2:54
Xcalibur
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answered Aug 27 '12 at 12:10
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Fragment or Support Fragment?
... So what's the purpose of the android.app.Fragment then? If you can add this to your answer here with a bit more explanation, I would be fully satisfied. Thanks!
– jonstaff
Jul 10 '13 at 12:47
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'const string' vs. 'static readonly string' in C#
...oaded, without recompiling.
This also means that a static readonly string can use non-constant members, such as Environment.UserName or DateTime.Now.ToString(). A const string can only be initialized using other constants or literals.
Also, a static readonly string can be set in a static construct...
How to create a new database using SQLAlchemy?
...f you are able to connect as a superuser (eg, the postgres role), then you can connect to the postgres or template1 databases. The default pg_hba.conf permits only the unix user named postgres to use the postgres role, so the simplest thing is to just become that user. At any rate, create an engin...
When to use pip requirements file versus install_requires in setup.py?
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My philosophy is that install_requires should indicate a minimum of what you need. It might include version requirements if you know that some versions will not work; but it shouldn't have version requirements where you aren't sure (e.g., you aren't sure if a future release...
Suppress command line output
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Because error messages often go to stderr not stdout.
Change the invocation to this:
taskkill /im "test.exe" /f >nul 2>&1
and all will be better.
That works because stdout is file descriptor 1, and stderr is file...
How do I start a program with arguments when debugging?
...es. Then click on the Debug tab, and fill in your arguments in the textbox called Command line arguments.
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log4j logging hierarchy order
...g OFF and ALL, well, after reading some of the source (not finding special cases) I doubt that their table is correct.
– Wolf
May 24 '18 at 9:58
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Jackson JSON custom serialization for certain fields
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You can implement a custom serializer as follows:
public class Person {
public String name;
public int age;
@JsonSerialize(using = IntToStringSerializer.class, as=String.class)
public int favoriteNumber:
}
pub...
How to open every file in a folder?
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Os
You can list all files in the current directory using os.listdir:
import os
for filename in os.listdir(os.getcwd()):
with open(os.path.join(os.cwd(), filename), 'r') as f: # open in readonly mode
# do your stuff
Glob
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