List method to delete last element in list as well as all elements
you can use lst.pop() or del lst[-1] pop() removes and returns the item, in case you don’t want have a return use del
methods
C# Method Resolution, long vs int
The int version of bar is being called, because 10 is an int literal and the compiler will look for the method which closest matches the input variable(s). To call the long version, you’ll need to specify a long literal like so: foo.bar(10L); Here is a post by Eric Lippert on much more complicated versions …
How to get list of controllers and actions in ruby on rails?
The easiest way to get a list of controller classes is: ApplicationController.descendants However, as classes are loaded lazily, you will need to eager load all your classes before you do this. Keep in mind that this method will take time, and it will slow down your boot: Rails.application.eager_load! To get all the actions in a …
Do class methods increase the size of the class instances?
Only instance data increases the size of instances of a class (in all implementations that I know of), except that if you add virtual functions or inherit from a class with virtual functions then you take a one-time hit for a v-table pointer. Also, as someone else correctly mentions the minimum size of a class …
How do methods use hash arguments in Ruby?
Example: def foo(regular, hash={}) puts “regular: #{regular}” puts “hash: #{hash}” puts “a: #{hash[:a]}” puts “b: #{hash[:b]}” end foo(“regular argument”, a: 12, :b => 13) I use hash={} to specify that the last argument is a hash, with default value of empty hash. Now, when I write: foo(“regular argument”, a: 12, :b => 13) It’s actually …
Why do I get a TypeError if I try to call a method directly from the class, supplying all arguments?
You can instantiate the class by declaring a variable and calling the class as if it were a function: x = mystuff() print x.average(9,18,27) However, this won’t work with the code you gave us. When you call a class method on a given object (x), it always passes a pointer to the object as the …
Calling a Activity method from BroadcastReceiver in Android
try this code : your broadcastreceiver class for internet lost class : public class InternetLostReceiver extends BroadcastReceiver{ @Override public void onReceive(Context context, Intent intent) { context.sendBroadcast(new Intent(“INTERNET_LOST”)); } } in your activity add this for calling broadcast: public class TestActivity extends Activity{ @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); registerReceiver(broadcastReceiver, new IntentFilter(“INTERNET_LOST”)); } BroadcastReceiver …