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What are the differences between the threading and multiprocessing modules?
...are cases where this doesn't matter. For example, a network server spends most of its time reading packets off the network, and a GUI app spends most of its time waiting for user events. One reason to use threads in a network server or GUI app is to allow you to do long-running "background tasks" wi...
What is the difference between user and kernel modes in operating systems?
...mory address. Kernel
mode is generally reserved for the
lowest-level, most trusted functions
of the operating system. Crashes in
kernel mode are catastrophic; they
will halt the entire PC.
User Mode
In User mode, the executing code has no ability to directly access
hardware or ref...
Favicons - Best practices
..., there was the touch icon, then multiple touch icons dues to the various iOS devices screen resolutions, then there was the tile icon for Windows...
Some answers here are very comprehensive - and overwhelming (all this, only for a favicon?). Yet, they fail at indicating that the 310x310 tile icon ...
An error occurred while installing pg (0.17.1), and Bundler cannot continue
...
I'm on a Mac running Mavericks. My solution was to install Postgres.
And then in terminal install using homebrew with the configuration:
gem install pg -- --with-pg-config=/Applications/Postgres.app/Contents/Versions/latest/bin/pg_config
Note: This answer has been edited to use th...
grep a tab in UNIX
...inst my pattern. Attempting to use that syntax prints nothing. (Is the Mac OS X variant different?)
– futureelite7
Feb 28 '10 at 15:42
2
...
Use PPK file in Mac Terminal to connect to remote connection over SSH [closed]
...
Useful answer!! Thanks for that!! For those who does not have port installed, can follow following link to install git: codingsteps.com/installing-and-using-putty-on-mac-os-x
– Viraj
Jan 28 '14 at 13:26
...
Retrieving the output of subprocess.call() [duplicate]
... and therefore it does not consume the pipes (as soon as the corresponding OS pipe buffer fills, the child process will hang forever). Popen().communicate() writes/reads data from pipes if PIPE is used thus allowing the child process to continue.
– jfs
Sep 2 '1...
INSTALL_FAILED_UPDATE_INCOMPATIBLE when I try to install compiled .apk on device
...I had to go into Settings -> Manage Applications to find the app and choose to Uninstall it from there as it wasn't showing up elsewhere.
– David Conlisk
Sep 16 '14 at 14:12
23
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What is stack unwinding?
...mple:
void func( int x )
{
char* pleak = new char[1024]; // might be lost => memory leak
std::string s( "hello world" ); // will be properly destructed
if ( x ) throw std::runtime_error( "boom" );
delete [] pleak; // will only get here if x == 0. if x!=0, throw exception
}
int...
How to make an Android device vibrate?
...
Try:
import android.os.Vibrator;
...
Vibrator v = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
// Vibrate for 500 milliseconds
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
v.vibrate(VibrationEffect.createOneShot(500, Vi...