Tutorial by Examples: io

Removing icon in navigation header in Anroid

Using a small transparent image called empty.png public class MyPage : ContentPage { public Page() { if (Device.OS == TargetPlatform.Android) NavigationPage.SetTitleIcon(this, "empty.png"); } }

Xamarin.Forms • Platform-specific behaviour

Make label's font size smaller in iOS

Label label = new Label { Text = "text" }; if(Device.OS == TargetPlatform.iOS) { label.FontSize = label.FontSize - 2; }

Xamarin.Forms • Platform-specific behaviour

A Simple Example of Method Injection in c#

using System; namespace ConsoleApplication1 { class Program { static void Main(string[] args) { var foo = new Dependency(); var bar = new ClassWithDependency(); bar.DoSomething(foo); //Inject dependency as method parameter ...

dependency-injection • Method injection

War File Creation

When we write an Web application in Grails, to deploy the application we need a "war" file that need's to be put in the servlet container (Tomcat etc). First goto the project directory : cd to_project_directory War file creation from command prompt : grails war 2.Its always r...

grails • Deployment

Add a directory to the distribution

To add for instance a directory scripts to the distribution package: Add to the project a folder scripts On top of the build.sbt, add: import NativePackagerHelper._ In build.sbt, add a mapping to the new directory: mappings in Universal ++= directory("scripts") B...

playframework • Building and packaging

Using Session variable

Server side Meteor.methods({ getData() { return 'Hello, world!'; } }); Client side <template name="someData"> {{#if someData}} <p>{{someData}}</p> {{else}} <p>Loading...</p> {{/if}} </template> Template.someData.on...

meteor • Retrieving data from a Meteor.call

Installation using LaraDock (Laravel Homestead for Docker)

LaraDock is a Laravel Homestead like development environment but for Docker instead of Vagrant. https://github.com/LaraDock/laradock Installation *Requires Git and Docker Clone the LaraDock repository: A. If you already have a Laravel project, clone this repository on your Laravel root director...

Laravel • Installation

Add new extensions to require()

You can add new extensions to require() by extending require.extensions. For a XML example: // Add .xml for require() require.extensions['.xml'] = (module, filename) => { const fs = require('fs') const xml2js = require('xml2js') module.exports = (callback) => { // ...

Node.js • Hack

Get current loggedin user information

Retrieves the information pertaining to the currently logged in user, and places it in the global variable $current_user This function does not accept any parameters. Usage: <?php wp_get_current_user(); ?> Example: <?php $current_user = wp_get_current_user(); echo 'Usernam...

WordPress • wp_get_current_user()

Violating REST

<stock> <add> <item> <name>Milk</name> <quantity>2</quantity> </item> </add> </stock> Putting this body to an resource like /stocks/123 violates the idea behind REST. While this bod...

rest • Getting started with rest

Annotation

Sample property file : nexus.properties Sample property file content: nexus.user=admin nexus.pass=admin nexus.rest.uri=http://xxx.xxx.xxx.xxx:xxxx/nexus/service/local/artifact/maven/content Sample Context File xml configuration <context:property-placeholder location="classpath:Releas...

spring • Property Source

Set Limit in product collection

$collection = Mage::getModel('catalog/product') ->getCollection() ->setPageSize(20) ->setCurPage(1);

magento • Get Products from Database

Using different Properties/Configuration for different environments like dev, qa, staging etc.

Large scale applications often need different properties when running on different environments. we can achieve this by passing arguments to NodeJs application and using same argument in node process to load specific environment property file. Suppose we have two property files for different enviro...

Node.js • Environment

Function Return

function positive() { return 0 } function negative() { return 1 }

Bash • true, false and : commands

Common HTML Operations

If the input HTML DOM is <html> <body> <a>link</a> <div class='container' id='divone'> <p class='common' id='enclosedone'>Element One</p> <p class='common' id='enclosedtwo'>Element Two</p> ...

xpath • Getting started with xpath

simple daemon application

A daemon process executes a program in the background, usually without user interaction. The example below shows how to create a daemon and register a listener, which monitors all open applications. The main part is the function call NSRunLoop.mainRunLoop().run(), which starts the daemon. class MyO...

osx • NSRunLoop

Serialization using Json.NET with JsonSerializerSettings

This serializer has some nice features that the default .net json serializer doesn't have, like Null value handling, you just need to create the JsonSerializerSettings : public static string Serialize(T obj) { string result = JsonConvert.SerializeObject(obj, new JsonSerializerSettings { NullVa...

.NET Framework • JSON Serialization

Optional URI Parameters and Default Values

You can make a URI parameter optional by adding a question mark to the route parameter. You can also specify a default value by using the form parameter=value. public class BooksController : Controller { // eg: /books // eg: /books/1430210079 [Route(“books/{isbn?}”)] public Act...

asp.net-mvc-5 • Attribute routing in mvc-5

Raspberry Pi Introduction - Hello World in C

Pretext This is an introduction to the Hello World program example on the Raspberry Pi written in C. The following example makes use of the command line interface and is set up as a step-by-step guide. Along with creating a Hello World program, the reader will be introduced to simple linux comman...

Raspberry Pi • Getting started with Raspberry Pi

Ratio_To_Report

Provides the ratio of the current rows value to all the values within the window. --Data CREATE TABLE Employees (Name Varchar2(30), Salary Number(10)); INSERT INTO Employees Values ('Bob',2500); INSERT INTO Employees Values ('Alice',3500); INSERT INTO Employees Values ('Tom',2700); INSERT INTO...

Oracle Database • Window Functions