Tutorial by Examples: g

Images are very important parts of any application. They provide the opportunity to inject additional visual elements as well as branding into your application. Not to mention that images are typically more interesting to look at than text or buttons. You can use an Image as a standalone element ...

An ImageCell is exactly what it sounds like. It is a simple Cell that contains only an Image. This control functions very similarly to a normal Image control, but with far fewer bells and whistles. XAML <ImageCell ImageSource="http://d2g29cya9iq7ip.cloudfront.net/content/imag es/company...

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...

This document details the steps to obtain the facebook access tokens and the using the tokens to fetch FB feeds. Example: A live example is available in https://newtonjoshua.com Introduction to Graph API: The Graph API is the primary way to get data in and out of Facebook's platform. It's a...

ContentPage: Displays a single View. XAML <?xml version="1.0" encoding="utf-8" ?> <ContentPage xmlns="http://xamarin.com/schemas/2014/forms" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" x:Class="XamlBasics.SampleXaml"> &lt...

MasterDetailPage: Manages two separate Pages (panes) of information. XAML <?xml version="1.0" encoding="utf-8" ?> <MasterDetailPage xmlns="http://xamarin.com/schemas/2014/forms" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" x:Class=&quot...

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...

With the 2.x versions of typescript, typings are now available from the npm @types repository. These are automatically resolved by the typescript compiler and are much simpler to use. To install a type definition you simply install it as a dev dependency in your projects package.json e.g. npm i -...

[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...

Arch: An official pacman-package is available. Install the package as root, using: pacman -S postgis OpenSuse: In order to use the openSuse repositories for geospatial applications, enable the Geo-repository as root: zypper ar http://download.opensuse.org/repositories/Application:/Geo/openSUS...

To disable synchronization context you should call the ConfigureAwait method: async Task() Foo() { await Task.Run(() => Console.WriteLine("Test")); } . . . Foo().ConfigureAwait(false); ConfigureAwait provides a means to avoid the default SynchronizationContext capturi...

The navigation pane located at the left hand side of the admin panel is how you navigate to and access different administration functionalities in the OpenCart back end. Pane expander Current account name and role Dashboard Catalog Categories Products Recurring Profiles Filters Attrib...

To connect to a server we must use SSH on the client as follows, # ssh -p port user@server-address port - The listening ssh port of the server (default port 22). user - Must be an existing user on the server with SSH privileges. server address - The IP/Domain of the server. For a real wor...

Both connecting to a remove SSH server and accepting SSH connections require installation of openssh Debian: # apt-get install openssh Arch Linux: # pacman -S openssh Yum: # yum install openssh

To generate keys for SSH client: ssh-keygen [-t rsa | rsa1 | dsa ] [-C <comment>] [-b bits] For example: ssh-keygen -t rsa -b 4096 - C [email protected] Default location is ~/.ssh/id_rsa for private and ~/.ssh/id_rsa.pub for public key. For more info, please visit man.openbsd.org

Usually we struggle through the process of making login in the Raspberry Pi using ssh or other similar tools. But we can make the process more pleasent. Once your Raspberry Pi is connected to a network it gets an IPv4 address and an IPv6 address, that is based on the NIC's MAC address. The good thi...