Tutorial by Examples: reat

public static DataTable ExcelPackageToDataTable(ExcelPackage excelPackage) { DataTable dt = new DataTable(); ExcelWorksheet worksheet = excelPackage.Workbook.Worksheets[1]; //check if the worksheet is completely empty if (worksheet.Dimension == null) { return dt;...

class GuestsCleanupJob < ApplicationJob queue_as :default def perform(*guests) # Do something later end end

Create your new project folder and open in windows-command prompt with the location of project folder. Type "dotnet new -t web" and hit. This is for creating new mvc template. Once complete. GO to the project location and see basic mvc project has been created. The...

Create an F# console application. Change the Output type of the application to Windows Application. Add the FsXaml NuGet package. Add these four source files, in the order listed here. MainWindow.xaml <Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" ...

const Schema = mongoose.Schema; const ObjectId = Schema.Types.ObjectId; const Article = new Schema({ title: { type: String, unique: true, required: [true, 'Article must have title'] }, author: { type: ObjectId, ref: 'User' } }); module.exports = mongoose....

You can create custom dialogs which contains many component and perform many functionality on it. It behaves like second stage on owner stage. In the following example an application that shows person in the main stage tableview and creates a person in a dialog (AddingPersonDialog) prepared. GUIs c...

JSON_OBJECT creates JSON Objects: SELECT JSON_OBJECT('key1',col1 , 'key2',col2 , 'key3','col3') as myobj; JSON_ARRAY creates JSON Array as well: SELECT JSON_ARRAY(col1,col2,'col3') as myarray; Note: myobj.key3 and myarray[2] are "col3" as fixed string. Also mixed JSON data: S...

In this example we are creating a new xs:complexType (EmployeeType) based on an existing xs:complexType (PersonType). The construction of this is slightly more complicated. Because the base xs:complexType (PersonType) is considered to be complex (more about this below) we add the <xs:complexCon...

This is where things get a little tricky. We are now restricting an existing xs:complexType. Our SolidStateDriveType derives from HardDiskType but removes the spinUpTime attribute and the RotationSpeed element. Notice the approach for dealing with attributes and elements is different. To remove an ...

Creates a directory, status is in OS-ERROR OS-CREATE-DIR directory Create a directory called /usr/local/appData OS-CREATE-DIR VALUE("/usr/local/appData").

import javax.inject.Singleton; import dagger.Module; import dagger.Provides; @Module public class VehicleModule { @Provides @Singleton Motor provideMotor(){ return new Motor(); } @Provides @Singleton Vehicle provideVehicle(){ return new Vehicle(...

# Getting started First, let’s generate a new Ruby on Rails application: rails new ModularTodo The next step is to generate an engine! cd ModularTodo && rails plugin new todo --mountable We will also create an ‘engines’ folder to store the engines (even if we just have one!). mk...

Ways to create a file with the echo command: ECHO. > example.bat (creates an empty file called "example.bat") ECHO message > example.bat (creates example.bat containing "message") ECHO message >> example.bat (adds "message" to a new line in example.bat)...

(clj-time/date-time 2017 1 20) Gives you a Joda time of 20th Jan 2017 at 00:00:00. Hours, minutes and seconds can also be specified as (clj-time/date-time year month date hour minute second millisecond)

In the directory if the xcodeproj, create a new file called Podfile. The following is an example of a Podfile that installs the pod 'AFNetworking' version 1.0 to the app MyApp. target 'MyApp' pod 'AFNetworking', '~> 1.0'

In this example, we create an empty index (we index no documents in it) by defining its mapping. First, we create an ElasticSearch instance and we then define the mapping of our choice. Next, we check if the index exists and if not, we create it by specifying the index and body parameters that cont...

You can create a new paint with one of these 3 constructors: new Paint() Create with default settings new Paint(int flags) Create with flags new Paint(Paint from) Copy settings from another paint It is generally suggested to never create a paint object, or any other object in onDraw() as it ...

You have to create a XAML file that defines the main window that contains our menu and drawing space. Here's the XAML code in MainWindow.xaml: <!-- This defines the main window, with a menu and a canvas. Note that the Height and Width are overridden in code to be 2/3 the dimensions of the...

The XAML file for the spirograph parameters is below. It includes three text boxes for the spirograph parameters and a group of three radio buttons for color. When we give radio buttons the same group name - as we have here - WPF handles the on/off switching when one is selected. <!-- This fi...

Here we can create UUID String with in one line. Represents UUID strings, which can be used to uniquely identify types, interfaces, and other items. Swift 3.0 print(UUID().uuidString) It is very useful for identify multiple devices with unique id.