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Showing empty view when ListView is empty
... any idea how to do that in app inventor?
– JinSnow
Mar 26 '15 at 16:56
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How to start two threads at “exactly” the same time
...he gate.
// Since we gave "3" as the argument, gate is not opened yet.
// Now if we block on the gate from the main thread, it will open
// and all threads will start to do stuff!
gate.await();
System.out.println("all threads started");
This doesn't have to be a CyclicBarrier, you could also use...
Can I access constants in settings.py from templates in Django?
...ettings.FAVORITE_COLOR}
return render_to_response(template, context)
Now you can access settings.FAVORITE_COLOR on your template as {{ favorite_color }}.
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Using varchar(MAX) vs TEXT on SQL Server
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I didn't know that it would store in the page at 8k, and out of the page if larger. Very cool.
– Brain2000
May 11 '12 at 18:35
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Compiling C++11 with g++
...n that I have to use the flag -std=c++0x or -std=gnu++0x , but I don't know many things about flags. Can anyone help me? (I'm using Ubuntu 12.04.)
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Rename specific column(s) in pandas
...x
1 x x x
2 x x x
3 x x x
4 x x x
With 0.21+, you can now specify an axis parameter with rename:
df.rename({'gdp':'log(gdp)'}, axis=1)
# df.rename({'gdp':'log(gdp)'}, axis='columns')
y log(gdp) cap
0 x x x
1 x x x
2 x x x
3 x x x
4...
What are the differences between ArrayList and Vector?
...t personal experience from clunking aroun huge arrays. Over three years on now, I can't point you to exactly what I was talking about but there are plenty of benchmarks out there. It's not until threading where you see the biggest jumps but here's one: javacodegeeks.com/2010/08/…
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IntelliJ and Tomcat…changed files are not automatically recognized by Tomcat
...ermines if IDEA prompts you each time you hit the update icon
Click OK.
Now anytime you make a change, IDEA will redeploy the changed file(s) when IDEA's frame is deactivated (i.e. loses focus). It does take a second or two, You'll see it in the lower status bar in IDEA. Obviously. you'll still n...
Get current batchfile directory
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Within your .bat file:
set mypath=%cd%
You can now use the variable %mypath% to reference the file path to the .bat file. To verify the path is correct:
@echo %mypath%
For example, a file called DIR.bat with the following contents
set mypath=%cd%
@echo %mypath%
Pause
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What is the most efficient way to deep clone an object in JavaScript?
...ined properties, etc., but this will also slow you down a little.
If you know the structure of the objects you are trying to clone or can avoid deep nested arrays you can write a simple for (var i in obj) loop to clone your object while checking hasOwnProperty and it will be much much faster than j...