Tutorial by Examples: w

TOP clause returns only first N rows in the result: SELECT TOP 10 * FROM sys.objects

SELECT statement can be executed without FROM clause: declare @var int = 17; SELECT @var as c1, @var + 2 as c2, 'third' as c3 In this case, one row with values/results of expressions are returned.

Add the following dependencies to your application. compile 'com.facebook.stetho:stetho:1.5.0' compile 'com.facebook.stetho:stetho-okhttp3:1.5.0' In your Application class' onCreate method, call the following. Stetho.initializeWithDefaults(this); When creating your Retrofit instance, crea...

We want to gather data created by multiple Workers. First we create a Queue: sink = Queue.new Then 16 workers all generating a random number and pushing it into sink: (1..16).to_a.map do Thread.new do sink << rand(1..100) end end.map(&:join) And to get the data, conver...

We want to process data in parallel. Let's populate source with some data: source = Queue.new data = (1..100) data.each { |e| source << e } Then create some workers to process data: (1..16).to_a.map do Thread.new do until source.empty? item = source.pop sleep 0.5 ...

We want to process data in parallel and push it down the line to be processed by other workers. Since Workers both consume and produce data we have to create two queues: first_input_source = Queue.new first_output_sink = Queue.new 100.times { |i| first_input_source << i } First wave of...

To avoid infinitely blocking, reading from queues shouldn't happen on the thread merge is happening on. To avoid synchronization or infinitely waiting for one of queues while other has data, reading from queues shouldn't happen on same thread. Let's start by defining and populating two queues:...

Haxe's enumeration types are algebraic data types (ADT). Their primary use is for describing data structures. Enums are denoted by the enum keyword and contain one or more enum constructors. enum Color { Red; Green; Blue; RGB(r : Int, g : Int, b : Int); } The above enum can ...

BackAndroid.addEventListener('hardwareBackPress', function() { if (!this.onMainScreen()) { this.goBack(); return true; } return false; }); Note: this.onMainScreen() and this.goBack() are not built in functions, you also need to implement those. (https://github.c...

public class SoundActivity extends Activity { private MediaPlayer mediaPlayer; ProgressBar progress_bar; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_tool_sound); ...

Problem: Vim users are not always happy. Solution: Make them happy. 7.4 :smile Note: Requires patch version ≥7.4.1005

The simplest way to get an event handler called on a key press is to connect the handler to the key-press-event signal. In this example, we register for the event for the whole window, but you can also register for individual widgets too. The most important part is the connection of the handler to ...

UIView *view = [[UIView alloc] init]; [self.view addSubview:view]; //Use the function if you want to use height as constraint [self addView:view onParentView:self.view withHeight:200.f]; //Use this function if you want to add view with respect to parent and should resize with it [self a...

Could be even more basic, but this showcases some of the features the Vala language. The code using Gtk; int main (string[] args) { Gtk.init (ref args); var window = new Window (); window.title = "First GTK+ Program"; window.border_width = 10; window.window_...

textBox.KeyPress += (sender, e) => e.Handled = !char.IsControl(e.KeyChar) && !char.IsDigit(e.KeyChar); This will only permit the use of digits and control characters in the TextBox, other combinations are possible using the same approach of setting the Handle property to true to block ...

textBox.SelectionStart = textBox.TextLength; textBox.ScrollToCaret(); Applying the same principle, SelectionStart can be set to 0 to scroll to the top or to a specific number to go to a specific character.

A StringBuilder represents a series of characters, which unlike a normal string, are mutable. Often times there is a need to modify strings that we've already made, but the standard string object is not mutable. This means that each time a string is modified, a new string object needs to be created,...

Sometimes we want the model to give more weight to some data points or examples than others. This is possible by specifying the weight for the input data while learning the model. There are generally two kinds of scenarios where we might use non-uniform weights over the examples: Analytic Weights...

If you are using Leiningen and your tests are located in the test directory in your project root then you can run your tests using lein test

In most cases, it is illegal to access an object of one type as though it were a different type (disregarding cv-qualifiers). Example: float x = 42; int y = reinterpret_cast<int&>(x); The result is undefined behavior. There are some exceptions to this strict aliasing rule: An obj...