Tutorial by Examples: w

Const baseString As String = "Foo Bar" 'Get the string starting at character 2 and ending at character 6 Dim midText As String midText = Mid$(baseString, 2, 5) 'midText = "oo Ba"

'Trim the leading and trailing spaces in a string Const paddedText As String = " Foo Bar " Dim trimmedText As String trimmedText = Trim$(paddedText) 'trimmedText = "Foo Bar"

public final class DrawerLayoutTest { @Test public void Open_Close_Drawer_Layout() { onView(withId(R.id.drawer_layout)).perform(actionOpenDrawer()); onView(withId(R.id.drawer_layout)).perform(actionCloseDrawer()); } public static ViewAction actionOpenDrawer() { return ne...

There is currently a proposal (not yet part of the ECMAScript standard) to add a finally callback to promises that will be executed regardless of whether the promise is fulfilled or rejected. Semantically, this is similar to the finally clause of the try block. You would usually use this functional...

We often encounter a situation where a property we're trying to extract doesn't exist in the object/array, resulting in a TypeError (while destructuring nested objects) or being set to undefined. While destructuring we can set a default value, which it will fallback to, in case of it not being found...

\documentclass{article}% or book, report, ... \begin{document} See \cite{citeA} or \cite{citeB} or \cite{citeA, citeB}. \begin{thebibliography}{x} % \bibitem{<biblabel>} <citation> \bibitem{citeA} {\scshape Author, A}, {\itshape A title}, Journal of So-and-So, 2000....

adduser command adds a user to the system. In order to add a new user type: sudo adduser <user_name> example: sudo adduser tom After typing the above command, you will be prompted to enter details about the new user, such as new password, user Full name, etc. Below is the information ...

Don't you hate it when interfaces pollute you class with too many members you don't even care about? Well I got a solution! Explicit Implementations public interface IMessageService { void OnMessageRecieve(); void SendMessage(); string Result { get; set; } int Encoding { get; se...

When using show.bind the element remains in the page and is either hidden or visible through the use of display:none or display:block behind the scenes. export class MyViewModel { isVisible = false; } <template> <div show.bind="isVisible"><strong>I can be b...

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 ...

Setup your view controller to manage editing of text for the text field. class MyViewController: UITextFieldDelegate { override viewDidLoad() { super.viewDidLoad() textField.delegate = self } } textFieldShouldReturn is called every time the return butto...

Create Oracle error log table ERR$_EXAMPLE for existing EXAMPLE table: EXECUTE DBMS_ERRLOG.CREATE_ERROR_LOG('EXAMPLE', NULL, NULL, NULL, TRUE); Make writing operation with SQL: insert into EXAMPLE (COL1) values ('example') LOG ERRORS INTO ERR$_EXAMPLE reject limit unlimited;

The difference in months between two dates can be found using the MONTHS_BETWEEN( date1, date2 ): SELECT MONTHS_BETWEEN( DATE '2016-03-10', DATE '2015-03-10' ) AS difference FROM DUAL; Outputs: DIFFERENCE ---------- 12 If the difference includes part months then it will return the ...

The Windows API GetTickCount function returns the number of milliseconds since the system (computer) was started. The simplest example follows: var Start, Stop, ElapsedMilliseconds: cardinal; begin Start := GetTickCount; // do something that requires measurement Stop := GetTickCount; ...

Appearance : Happens when your script tries to send a HTTP header to the client but there already was output before, which resulted in headers to be already sent to the client. Possible Causes : Print, echo: Output from print and echo statements will terminate the opportunity to send HTTP hea...

What is XAMPP? XAMPP is the most popular PHP development environment. XAMPP is a completely free, open-source and easy to install Apache distribution containing MariaDB, PHP, and Perl. Where should I download it from? Download appropriate stable XAMPP version from their download page. Choose the ...

Without Auto Layout, animation is accomplished changing a view's frame over time. With Auto Layout, the constraints dictate the view frame, so you have to animate the constraints instead. This indirection makes animation harder to visualize. Here are the ways to animate with Auto Layout: Change ...

let mySwitch: UISwitch = { view.addSubview($0) $0.addTarget(self, action: "action", forControlEvents: .TouchUpInside) return $0 }(UISwitch())

This is similar in syntax to the example that initializes using positional constants, but requires the Then extension from https://github.com/devxoul/Then (attached below). let label = UILabel().then { $0.textAlignment = .Center $0.textColor = UIColor.blackColor( $0.text = "Hell...

//Swift let initialScreen = storyboard.instantiateInitialViewController() //Objective-c UIViewController *initailScreen = [storyboard instantiateInitialViewController];