“Exit, Exit! Abort, Raise…Get Me Outta Here!” describes everything you’d want to know I think. In short: Kernel.exit(code) “exits” the script immediately and returns the code to the OS, however, just before doing it, it calls any registered at_exit handler that your code could have registered. Kernel.exit!(code) does the same, but exits immediatelly, no at_exit … Read more
According to the documentation I found at google, simply closing the emulator window is the correct way to shut the emulator down. To stop an emulator instance, just close the emulator’s window. Source: Starting and Stopping the Emulator
shutdown -c is “cancel shutdown” on reasonably recent shutdowns. The syntax also supports shutdown -c <message> for announcement purposes, so that’s handy if other people use the machine.
One way is to do: sys.exit(0) You will have to import sys of course. Another way is to break out of your infinite loop. For example, you could do this: while True: choice = get_input() if choice == “a”: # do something elif choice == “q”: break Yet another way is to put your main … Read more
In my Home Activity I override the “onBackPressed” to: @Override public void onBackPressed() { Intent intent = new Intent(Intent.ACTION_MAIN); intent.addCategory(Intent.CATEGORY_HOME); intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); startActivity(intent); } so if the user is in the home activity and press back, he goes to the home screen. I took the code from Going to home screen Programmatically
Are there any other circumstances where they[destructors] will not be called? Long jumps: these interfere with the natural stack unwinding process and often lead to undefined behavior in C++. Premature exits (you already pointed these out, though it’s worth noting that throwing while already stack unwinding as a result of an exception being thrown leads … Read more
Just negate the return value. ! grep -P “STATUS: (?!Perfect)” recess.txt
Below used main.xml file <?xml version=”1.0″ encoding=”utf-8″?> <LinearLayout xmlns:android=”http://schemas.android.com/apk/res/android” android:orientation=”vertical” android:layout_width=”fill_parent” android:layout_height=”fill_parent”> <TextView android:layout_width=”fill_parent” android:layout_height=”wrap_content” android:id=”@+id/txt1″ android:text=”txt1″ /> <TextView android:layout_width=”fill_parent” android:layout_height=”wrap_content” android:id=”@+id/txt2″ android:text=”txt2″/> <Button android:layout_width=”fill_parent” android:layout_height=”wrap_content” android:id=”@+id/btn1″ android:text=”Close App” /> </LinearLayout> and text.java file is below import android.app.Activity; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; public class testprj extends Activity { /** Called when … Read more
Below is the fixed code: #!/bin/ksh safeRunCommand() { typeset cmnd=”$*” typeset ret_code echo cmnd=$cmnd eval $cmnd ret_code=$? if [ $ret_code != 0 ]; then printf “Error: [%d] when executing command: ‘$cmnd'” $ret_code exit $ret_code fi } command=”ls -l | grep p” safeRunCommand “$command” Now if you look into this code, the few things that I … Read more
Option #1: Simply never catch exceptions. Exceptions don’t have much overhead when they’re not thrown or caught; if you’re throwing and not prepared to catch, well, you’re doing to die anyway, so the performance impact at that point is trivial. Note also that stack unwinding will not be performed if an exception is not handled; … Read more