Tutorial by Examples: el

Unlike show.bind when using if.bind the element will be removed from the page if the supplied binding value is false or added into the page if the value is true. export class MyViewModel { isVisible = false; } <template> <div if.bind="isVisible"><strong>If ...

Create a server.js file with the following contents: 'use strict'; const Hapi = require('hapi'); // Create a server instance const server = new Hapi.Server(); // Specify connections (server available on http://localhost:8000) server.connection({ port: 8000 }); // Add a route ...

Sample Data: CREATE TABLE table_name ( value VARCHAR2(50) ); INSERT INTO table_name ( value ) VALUES ( 'A,B,C,D,E' ); Query: WITH items ( list, item, lvl ) AS ( SELECT value, REGEXP_SUBSTR( value, '[^,]+', 1, 1 ), 1 FROM table_name UNION ALL SELECT value, ...

Suppose you have two lists: A and B, and you need to find the elements that exist in both lists. You can do it by just invoking the method List.retainAll(). Example: public static void main(String[] args) { List<Integer> numbersA = new ArrayList<>(); List<Integer> numb...

Assume you have a application that administers rooms. Assume further that your application operates on a per client basis (tenant). You have several clients. So your database will contain one table for clients, and one for rooms. Now, every client has N rooms. This should mean that you have...

Input.acceleration is used to read the accelerometer sensor. It returns Vector3 as a result which contains x,y and z axis values in 3D space. void Update() { Vector3 acclerometerValue = rawAccelValue(); Debug.Log("X: " + acclerometerValue.x + " Y: " + acclerometerV...

You can use the DataExtension mechanism to add extra database fields to an existing DataObject: class MyMemberExtension extends DataExtension { private static $db = [ 'HairColour' => 'Varchar' ]; } And apply the extension: # File: mysite/_config/app.yml Member: exten...

You can provide help for message box in different ways. You can configure a MessageBox to show a Help button or not. Also you can configure MessageBox in a way that when the user requests for help by click on Help button or by pressing F1, it show a CHM file or navigate to a URL or perform a custom ...

You can provide help for OpenFileDialog, SaveFileDialog and ColorDialog. To do so set ShowHelp property of dialog to true and handle HelpRequest event for dialog: void openFileDialog1_HelpRequest(object sender, EventArgs e) { //Perform custom action Help.ShowHelp(this, "Http://examp...

When a user press F1 on a control or click on Help button of form (?) and then clicks on a control the HelpRequested event will be raised. You can handle this event to provide custom action when user requests help for controls or form. The HelpRequested supports bubble up mechanism. It fires for y...

You can use Help class in code, to provide these kinds of help: Show a help pop-up for a control Open a CHM file based on context (Show table of content, Show a keyword or index, show a topic) Navigate to a URL using default browser Show Help pop-up window You can use Help.ShowPopup to disp...

You can show a Help Button at title-bar of a Form. To do so, you should: Set HelpButton property of form to true. Set MinimizeBox and MaximizeBox to false. Then a help button will appear on title-bar of Form: Also when you click on Help button, the cursor will be changed to a ? cursor: ...

If you have a Form with MinimizeBox and MaximizeBox set to true, then you can not show Help button on title-bar of Form and will lose the feature of click on help button to convert it to help cursor to be able to click on controls to show help. You can make a menu item on MenuStrip act like standar...

You can detect when a user Clicked on a HelpButton on title-bar of form by handling HelpButtonClicked. You can let the event continue or cancel it by setting Cancel property of its event args to true. private void Form1_HelpButtonClicked(object sender, CancelEventArgs e) { e.Cancel = true; ...

SELECT * FROM Cars WHERE status IN ( 'Waiting', 'Working' ) This is semantically equivalent to SELECT * FROM Cars WHERE ( status = 'Waiting' OR status = 'Working' ) i.e. value IN ( <value list> ) is a shorthand for disjunction (logical OR).

Using raw values directly from the accelerometer sensor to move or rotate a GameObject can cause problems such as jerky movements or vibrations. It is recommended to smooth out the values before using them. In fact, values from the accelerometer sensor should always be smoothed out before use. This ...

Before we start... In terms of application layers your ViewModel is a class containing all the business logic and rules making the app do what it should according to the requirements. It's also important to make it as much independent as possible reducing references to UI, data layer, native featur...

In this example we create a goroutine (a function running in a separate thread) that accepts a chan parameter, and simply loops, sending information into the channel each time. In the main we have a for loop and a select. The select will block processing until one of the case statements becomes tru...

So here, I have removed the for loops, and made a timeout by adding a second case to the select that returns after 3 seconds. Because the select just waits until ANY case is true, the second case fires, and then our script ends, and chatter() never even gets a chance to finish. // Use of the select...

NHibernate uses classes to map into tables or views. Creating a Plain Old CLR Object (POCOs, sometimes called Plain Ordinary CLR Objects) is a good practice for persistent classes. A POCO has its data accessible through the standard .NET property mechanisms, shielding the internal representation fro...