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Using a Template Engine The following code will setup Jade as template engine. (Note: Jade has been renamed to pug as of December 2015.) const express = require('express'); //Imports the express module const app = express(); //Creates an instance of the express module const PORT = 3000; //Ra...

Example Using Activity w/ LocationRequest /* * This example is useful if you only want to receive updates in this * activity only, and have no use for location anywhere else. */ public class LocationActivity extends AppCompatActivity implements GoogleApiClient.ConnectionCallbacks, ...

Data Model public class Item { private String name; public String getName() { return name; } public void setName(String name){ this.name = name; } } Layout XML <?xml version="1.0" encoding="utf-8"?> <layout xmlns:an...

SELECT s.name + '.' + t.NAME AS TableName, SUM(a.used_pages)*8 AS 'TableSizeKB' --a page in SQL Server is 8kb FROM sys.tables t JOIN sys.schemas s on t.schema_id = s.schema_id LEFT JOIN sys.indexes i ON t.OBJECT_ID = i.object_id LEFT JOIN sys.partitions p ON i.object_id = ...

Since JUnit is a Java library, all you have to do to install it is to add a few JAR files into the classpath of your Java project and you're ready to go. You can download these two JAR files manually: junit.jar & hamcrest-core.jar. If you're using Maven, you can simply add in a dependency into...

Caller info attributes can be used to pass down information about the invoker to the invoked method. The declaration looks like this: using System.Runtime.CompilerServices; public void LogException(Exception ex, [CallerMemberName]string callerMemberName = "", ...

Returns one of two values depending on the value of a Boolean expression. Syntax: condition ? expression_if_true : expression_if_false; Example: string name = "Frank"; Console.WriteLine(name == "Frank" ? "The name is Frank" : "The name is not Frank"); ...

Have required JavaScript and CSS files included in your index.html. You can do this by either using the CDN files availiable at the following paths: <link rel="stylesheet" type="text/css" href="//cdn.datatables.net/1.10.12/css/jquery.dataTables.css"> <scr...

XML elements often nest, have data in attributes and/or as character data. The way to capture this data is by using ,attr and ,chardata respectively for those cases. var doc = ` <parent> <child1 attr1="attribute one"/> <child2>and some cdata</child2> </p...

Using the Android API 23 or higher, very often such situation can be seen: This situation is caused by the structural change of the Android API regarding getting the resources. Now the function: public int getColor(@ColorRes int id, @Nullable Theme theme) throws NotFoundException should ...

Operators such as +, -, ?? are a kind of function named using symbols rather than letters. They are invoked differently from functions: Prefix: -x Infix: x + y Postfix: x++ You can read more about basic operators and advanced operators in The Swift Programming Language.

MediaPlayer class can be used to control playback of audio/video files and streams. Creation of MediaPlayer object can be of three types: Media from local resource MediaPlayer mediaPlayer = MediaPlayer.create(context, R.raw.resource); mediaPlayer.start(); // no need to call prepare(); create...

Package can have init methods which are run only once before main. package usefull func init() { // init code } If you just want to run the package initialization without referencing anything from it use the following import expression. import _ "usefull"

Directives comes with the AngularJS library itself. A sample directive can be created as: angular.module('simpleDirective', []) .directive('helloData', function() { return { template: 'Hello, {{data}}' }; }); And can be used as: JS: angular.module('app', ['simpleDirective']) .con...

The goal is to generate the following XML document: <FruitBasket xmlns="http://www.fruitauthority.fake"> <Fruit ID="F0001"> <FruitName>Banana</FruitName> <FruitColor>Yellow</FruitColor> </Fruit> <Fruit ID="F000...

Set the MONGO_URL environment variable before starting your local Meteor app. Linux/MacOS Example: MONGO_URL="mongodb://some-mongo-host.com:1234/mydatabase" meteor or export MONGO_URL="mongodb://some-mongo-host.com:1234/mydatabase" meteor Windows Example Note: don't u...

Matplotlib axes are two-dimensional by default. In order to create three-dimensional plots, we need to import the Axes3D class from the mplot3d toolkit, that will enable a new kind of projection for an axes, namely '3d': import matplotlib.pyplot as plt from mpl_toolkits.mplot3d import Axes3D fi...

Create a DataFrame from multiple lists by passing a dict whose values lists. The keys of the dictionary are used as column labels. The lists can also be ndarrays. The lists/ndarrays must all be the same length. import pandas as pd # Create DF from dict of lists/ndarrays df = pd.DataFrame({'...

Only when the foreach statement moves to the next item does the iterator block evaluate up to the next yield statement. Consider the following example: private IEnumerable<int> Integers() { var i = 0; while(true) { Console.WriteLine("Inside iterator: " + i...

Function level annotations help IDEs identify return values or potentially dangerous code /** * Adds two numbers together. * * @param Int $a First parameter to add * @param Int $b Second parameter to add * @return Int */ function sum($a, $b) { return (int) $a + $b; } /** * ...