Tutorial by Examples: r

Why do we need this? The current way to do unit testing in Xamarin.Forms is via a platform runner, so your test will have to run within an ios, android, windows or mac UI environment : Running Tests in the IDE Xamarin also provides awesome UI testing with the Xamarin.TestCloud offering, but when ...

To add to the first example, in order to test navigation statements that occurs within the application, we need to provide the ViewModel with a hook to the Navigation. To achieve this: Add the package SpecFlow.Xamarin.Forms.IViewModel from nuget to your PCL Xamarin.Forms project Implement the IV...

First you need to implement Realm at the start of your class using Realms; Then to print the location to the console : Console.WriteLine( RealmConfiguration.PathToRealm() ); Or if you're using DefaultConfiguration, you can use : Console.WriteLine( RealmConfiguration.DefaultConfiguration.Dat...

Bootstrap uses a Grid System having rows and columns In the Grid system, you are using a row class to create a horizontal box with a total of 12 columns of size 1 unit each for different screen size vertically. If you do not want to use all 12 columns individually, you can group the columns togeth...

const options = require("commander"); options .option("-v, --verbose", "Be verbose"); options .command("convert") .alias("c") .description("Converts input file to output file") .option("-i, --in-file <file_name&...

Step 1: Create a bluemix account Create an account at https://console.ng.bluemix.net/registration/ This will set you up with a 30 day trial. You don't have to pay anything for the free resources and you don't have to set up billing until the end of your trial (though not all services will be avail...

Assuming a abstract class: class ILogger { virtual ~ILogger() = default; virtual Log(const std::string&) = 0; }; Instead of void doJob(ILogger* logger) { if (logger) { logger->Log("[doJob]:Step 1"); } // ... if (logger) { logge...

NATURAL JOIN requires no explitic join condition; it builds one based on all the fields with the same name in the joined tables. create table tab1(id number, descr varchar2(100)); create table tab2(id number, descr varchar2(100)); insert into tab1 values(1, 'one'); insert into tab1 values(2, '...

Microsoft Command Prompt is a command-line interpreter (CLI) for the Windows operating systems. A CLI is program intended primarily to read operating system instructions typed on a keyboard by the user. It is therefore addressed also as a command-line interface, to contrast it with graphical inter...

Command Prompt batch scripts have extension .cmd or .bat, the latter for compatibility reasons. To create a hello-word-script, you first need a place where to type it. For simple scripts, also the Windows Notepad will do. If you are serious about shell scripting, you need more effective tools. The...

Orchard is a free, open source, community-focused Content Management System built on the ASP.NET MVC platform. Orchard is built on a modern architecture that puts extensibility up-front, as its number one concern. All components in Orchard can be replaced or extended. Content is built from easily c...

Explain how Orchard theming works

Core Graphics context A Core Graphics context is a canvas which we can draw in it and set some properties like the line thickness. Making a context To make a context, we use the UIGraphicsBeginImageContextWithOptions() C function. Then, when we are done with drawing, we just call UIGraphicsEn...

Swift let image = UIGraphicsGetImageFromCurrentImageContext() imageView.image = image //assuming imageView is a valid UIImageView object Objective-C UIImage *image = UIGraphicsGetImageFromCurrentImageContext(); imageView.image = image; //assuming imageView is a valid UIImageView object

ASP.NET validation controls validate the user input data to ensure that useless, unauthenticated, or contradictory data don't get stored. ASP.NET provides the following validation controls: RequiredFieldValidator RangeValidator CompareValidator RegularExpressionValidator CustomValidator Val...

The RequiredFieldValidator control ensures that the required field is not empty. It is generally tied to a text box to force input into the text box. The syntax of the control is as given: <asp:RequiredFieldValidator ID="rfvcandidate" runat="server" ControlToValidate =&...

The RangeValidator control verifies that the input value falls within a predetermined range. It has three specific properties: PropertiesDescriptionTypeIt defines the type of the data. The available values are: Currency, Date,MinimumValueIt specifies the minimum value of the range.MaximumValueIt s...

The CompareValidator control compares a value in one control with a fixed value or a value in another control. It has the following specific properties: PropertiesDescriptionTypeIt specifies the data type.ControlToCompareIt specifies the value of the input control to compare with.ValueToCompareIt ...

The RegularExpressionValidator allows validating the input text by matching against a pattern of a regular expression. The regular expression is set in the ValidationExpression property. The following table summarizes the commonly used syntax constructs for regular expressions: Character EscapesDe...

The ValidationSummary control does not perform any validation but shows a summary of all errors in the page. The summary displays the values of the ErrorMessage property of all validation controls that failed validation. The following two mutually inclusive properties list out the error message: S...