Tutorial by Examples: g

public interface ILogger { void Log(string message); } [Export(typeof(ILogger))] [ExportMetadata("Name", "Console")] public class ConsoleLogger:ILogger { public void Log(string message) { Console.WriteLine(message); } } [Export(typeof(IL...

Label Tag Helper can be used to render label for a model property. It replaces method Html.LabelFor in previous versions of MVC. Let's say you have a model: public class FormViewModel { public string Name { get; set; } } In the view you can use label HTML element and asp-for tag helper: ...

Marks are like bookmarks; they help you find places you've already been. TLDR Set them in normal mode with m{a-zA-Z}, and jump to them in normal or visual mode with '{a-zA-Z} (single quote) or `{a-zA-Z} (backtick). Lowercase letters are for marks within a buffer, and capital letters and digits are...

Suppose you have a long list of elements and you are only interested in every other element of the list. Perhaps you only want to examine the first or last elements, or a specific range of entries in your list. Python has strong indexing built-in capabilities. Here are some examples of how to achie...

An observable is created from the TextChanged event of the TextBox. Also any input is only selected if it's different from the last input and if there was no input within 0.5 seconds. The output in this example is sent to the console. Observable .FromEventPattern(textBoxInput, "TextChan...

What are local and global scope? All Python variabes which are accessible at some point in code are either in local scope or in global scope. The explanation is that local scope includes all variables defined in the current function and global scope includes variabled defined outside of the curren...

You can close a notification by using the .close() method. let notification = new Notification(title, options); // do some work, then close the notification notification.close() You can utilize the setTimeout function to auto-close the notification sometime in the future. let notification = n...

import java.awt.EventQueue; import java.awt.GridLayout; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import java.awt.event.WindowListener; import java.util.ArrayList; import java.util.List; import javax.swing.JFrame; import javax.swing.JTextArea; import javax.sw...

Create a font extension using the IDE. See the iReport or Jaspersoft Studio documentation for details. The font extension can also be created manually. What are font extensions? Using a textElement you can specify a font (if not specified default font SansSerif is used) <textElement> &...

CREATE CLUSTERED COLUMNSTORE INDEX enables you to organize a table in column format: DROP TABLE IF EXISTS Product GO CREATE TABLE Product ( Name nvarchar(50) NOT NULL, Color nvarchar(15), Size nvarchar(5) NULL, Price money NOT NULL, Quantity int ) GO CREATE CLUSTERED C...

The NotifyPropertyChangedBaseclass below defines a generic Set method that can be called from any derived type. public class NotifyPropertyChangedBase : INotifyPropertyChanged { protected void RaisePropertyChanged([CallerMemberName] string propertyName = null) => PropertyChanged?.Invo...

Erlang on OpenBSD is currently broken on alpha, sparc and hppa architectures. Method 1 - Pre-built Binary Package OpenBSD let you choose desired version you want to install on your system: ###################################################################### # free-choice: ####################...

Consider the following partial example: import com.example.somelib.*; import com.acme.otherlib.*; public class Test { private Context x = new Context(); // from com.example.somelib ... } Suppose that when when you first developed the code against version 1.0 of somelib and versi...

You can setup your client browser to listen in incoming server events using the EventSource object. You will need to supply the constructor a string of the path to the server' API enpoint the will subscribe the client to the server events. Example: var eventSource = new EventSource("api/my-ev...

An event stream to the server can be closed using the EventSource.close() method var eventSource = new EventSource("api/my-events"); // do things ... eventSource.close(); // you will not receive anymore events from this object The .close() method does nothing is the stream is already...

There are many ways to communicate with servers using Unity as the client (some methodologies are better than others depending on your purpose). First, one must determine the need of the server to be able to effectively send operations to and from the server. For this example, we will send a few pie...

Suppose that we have the following text file: jekyll_hyde.txt How do we convert it to a PDF that looks like this: Note the blue border that is added to the titles, and the page number at the bottom of each page. In iText 5, these elements are added using page events: class MyPageEvents extends ...

Suppose that you have the following text file: jekyll_hyde.txt How do we convert it to a PDF that looks like this: Note the page numbers at the bottom of each page. These are added using an IEventHandler implementation: protected class Footer implements IEventHandler { @Override pub...

Suppose that you have the following text file: jekyll_hyde.txt How do we convert it to a PDF that looks like this: Note that this is very similar to what we had before, but the border of the titles now has rounded corners. We created a custom ParagraphRenderer to achieve this, and we created a T...

Executable JAR files are the simplest way to assemble Java code into a single file that can be executed. *(Editorial Note: Creation of JAR files should be covered by a separate Topic.) * Assuming that you have an executable JAR file with pathname <jar-path>, you should be able to run it as f...