Tutorial by Examples: u

This is the Cypher, Neo4j's query language. In many ways, Cypher is similar to SQL if you are familiar with it, except SQL refers to items stored in a table while Cypher refers to items stored in a graph. First, we should start out by learning how to create a graph and add relationships, since tha...

using System; using System.Collections.Generic; using System.Linq; using System.Reflection; using System.Text; using System.Threading.Tasks; using System.Xml; using System.Xml.Linq; using ApplicationDataServices.SBEntityBox; namespace ApplicationManagementLayer.Affiliate { public cl...

Objective-C and Xib Add a target to an existing XCode project In the Add Target select Custom KeyBoard Add the target like this: Your project file directory should look something like this Here myKeyBoard is the name of the added Target Add new Cocoatouch file of type of type UIView and ...

Before getting started, make sure you have the latest Azure PowerShell installed. Once installed, start an Azure PowerShell session from your machine. First, you'll need to log in and authenticate to Windows Azure. Add-AzureRmAccount You'll receive a dialog box asking for your Azure credentials...

roslaunch is an important tool that manages the start and stop of ROS nodes. It takes one or more "*.launch" files as arguments. For this example, I will refer to the following (as asked in this question), so how can we execute those commands consecutively & automatically : roscd ste...

Objective-C //Checking for 3-D Touch availability if ([self.traitCollection respondsToSelector:@selector(forceTouchCapability)] && (self.traitCollection.forceTouchCapability == UIForceTouchCapabilityAvailable)) { [self registerForPreviewingWithDelegate:self sourceVie...

let bodies = (contact.bodyA.categoryBitMask <= contact.bodyB.categoryBitMask) ? (A:contact.bodyA,B:contact.bodyB) : (A:contact.bodyB,B:contact.bodyA) switch (bodies.A.categoryBitMask,bodies.B.categoryBitMask) { case let (a, _) where (a && superPower): //All we care about is i...

The module keyword can be used to begin a module, which allows code to be organized and namespaced. Modules can define an external interface, typically consisting of exported symbols. To support this external interface, modules can have unexported internal functions and types not intended for public...

Typically, packages consist of one or more modules. As packages grow, it may be useful to organize the main module of the package into smaller modules. A common idiom is to define those modules as submodules of the main module: module RootModule module SubModule1 ... end module SubModul...

The Button is probably the most common control not only in mobile applications, but in any applications that have a UI. The concept of a button has too many purposes to list here. Generally speaking though, you will use a button to allow users to initiate some sort of action or operation within you...

Easly access geolocation across Xamarin.iOS, Xamarin.Android and Windows. Available Nuget: [https://www.nuget.org/packages/Xam.Plugin.Geolocator/][1] XAML <StackLayout Spacing="10" Padding="10"> <Button x:Name="buttonGetGPS" Text="Get GPS"/...

Take or pick photos and videos from a cross platform API. Available Nuget : [https://www.nuget.org/packages/Xam.Plugin.Media/][1] XAML <StackLayout Spacing="10" Padding="10"> <Button x:Name="takePhoto" Text="Take Photo"/> <Butto...

Messaging plugin for Xamarin and Windows to make a phone call, send a sms or send an e-mail using the default messaging applications on the different mobile platforms. Available Nuget : [https://www.nuget.org/packages/Xam.Plugins.Messaging/][1] XAML <StackLayout Spacing="10" Padding...

Check to see if your users have granted or denied permissions for common permission groups on iOS and Android. Additionally, you can request permissions with a simple cross-platform async/awaitified API. Available Nuget : https://www.nuget.org/packages/Plugin.Permissions enter link description he...

There are many reasons a write operation may fail. A frequent one is because your security rules reject the operation, for example because you're not authenticated (by default a database can only be accessed by an authenticated user). You can see these security rule violations in the console output...

Class is the piece of code where we define the attributes and/or behaviors of an object. You can define variables, constants, methods and constructors to the object, inside the class. In another words, class is the blueprint of an object. Let's see a sample class in Java, which defines a (simple) C...

In Qt you should use QLinkedList in case you need to implement linked list. It is fast to append, prepend, insert elements into QLinkedList - O(1), but index lookup is slower than in QList or QVector - O(n). This is normal taking into attention you have to iterate through nodes to find something in...

Object is the base module in the Object Oriented Programming (OOP). An Object can be a variable, data structure (like an array, map, etc), or even a function or method. In OOP, we model real world objects like animals, vehicles, etc. An object can be defined in a class, which can be defined as the ...

[Service] # empty exec prevents error "docker.service has more than one ExecStart= setting, which is only allowed for Type=oneshot services. Refusing." ExecStart= ExecStart=/usr/bin/dockerd -H fd:// --log-driver=syslog This enables syslog logging for the docker daemon. The file sho...

There are two classes of methods for solving Linear Equations: Direct Methods: Common characteristics of direct methods are that they transform the original equation into equivalent equations that can be solved more easily, means we get solve directly from an equation. Iterative Method: It...