Tutorial by Examples: io

Another way of doing aggregations is by using the Mongo.Collection#rawCollection() This can only be run on the Server. Here is an example you can use in Meteor 1.3 and higher: Meteor.methods({ 'aggregateUsers'(someId) { const collection = MyCollection.rawCollection() const aggre...

Use Nuget to install the Nancy and Nancy.Hosting.Self packages into the project. Instantiate a new NancyHost object and pass in the relevant URL using( var host = new NancyHost( hostConfiguration, new Uri( "http://localhost:1234" ) ) ) { host.Start(); Console.WriteLine( "Running o...

When you want to work with the data entries in arrays you first need to unwind the array. The unwind operation creates a document for each entry in the array. When you have lot's of documents with large arrays you will see an explosion in number of documents. { "_id" : 1, "item"...

_refreshListView(){ //Start Rendering Spinner this.setState({refreshing:true}) this.state.cars.push( {name:'Fusion',color:'Black'}, {name:'Yaris',color:'Blue'} ) //Updating the dataSource with new data this.setState({ dataSource: this.state.data...

Tuples are immutable ordered collections of arbitrary distinct objects, either of the same type or of different types. Typically, tuples are constructed using the (x, y) syntax. julia> tup = (1, 1.0, "Hello, World!") (1,1.0,"Hello, World!") The individual objects of a tup...

The IIF statement can be used in expressions to screen for division by zero: =IIF(Fields!PossibleZero.Value=0,0,Fields!Denominator.Value/IIF(Fields!PossibleZero.Value=0,1,Fields!PossibleZero.Value)) SSRS does not short circuit IIF arguments. Therefore, using a single IIF function to screen for ...

In order to use a plain-text editor to create a Console application that is written in C#, you'll need the C# Compiler. The C# Compiler (csc.exe), can be found at the following location: %WINDIR%\Microsoft.NET\Framework64\v4.0.30319\csc.exe N.B. Depending upon which version of the .NET Framework t...

The simplest manner of defining custom behavior for individual routes would be fairly easy. In this example we use it to authenticate a user : 1) routes.js: create a new property (like requireAuth) for any desired route angular.module('yourApp').config(['$routeProvider', function($routeProvider) ...

using System.Diagnostics.Contracts; public int IncrementByRandomAmount(int input) { Contract.Requires<ArgumentNullException>(input != null); // Don't allow null parameter. Contract.Requires<ArgumentOutOfRangeException>(input < int.MaxValue); // We can't do anything if...

Create an instance of Mobile Analytics for Bluemix. Add the Bluemix Mobile Services SDK to your iOS project. After installing the SDK, add these import statements at top of your AppDelegate.swift file: import BMSCore import BMSAnalytics Next you'll need to initialize and send mobile ana...

This example shows how to take image and display it correctly on the Android device. Firstly we have to create sample application with one button and one imageview. Once user clicks on the button camera is launched and after user selects picture it will be displayed with the proper orientation on ...

In this example, I created a form which is used to register a new user. In the options passed to the form, I give the different roles a user can have. Creating a reusable class for my form with configured data class and an extra option that fills the choice field to pick a userrole: class UserType...

Besides main required functional includes, you may need other includes, like themes and plugins. Those reside in /themes/ and /plugins/ sub-directories respectively. I.e.: <script src="https://www.amcharts.com/lib/3/amcharts.js"></script> <script src="https://www.amc...

wxPython Phoenix is the latest version of wxPython, (currently Sept 2016 without an official release). It supports both Python 2 and Python 3. You can download a snapshot build (i.e. a Python wheel) for your platform and Python version here. wxPython Phoenix utilizes a largely automated mechanism ...

The CEILING function rounds a number up, away from zero, to the nearest multiple of significance. The FLOOR function does the same by rounds the number down towards zero. An example of when CEILING could be be used is if you want to avoid using pennies in your prices and your product is priced at $...

The FIXED function rounds a number to the specified number of decimals defined by the decimals parameter, formats the number in decimal format using a comma as a separator unless specified as not required defined by the parameter no_commas, and returns the result as text. The decimals parameter is o...

sed -i -e cmd file will modify file even if its permissions are set to read-only. This command behaves similarly to sed -e cmd file > tmp; mv -f tmp file rather than sed -e cmd file > tmp; cat tmp > file; rm tmp The following example uses gnu sed: $ echo 'Extremely important data' &gt...

You can use concatenation to join strings "end to end" while outputting them (with echo or print for example). You can concatenate variables using a . (period/dot). // String variable $name = 'Joel'; // Concatenate multiple strings (3 in this example) into one and echo it once done. ...

You can also use interpolation to interpolate (insert) a variable within a string. Interpolation works in double quoted strings and the heredoc syntax only. $name = 'Joel'; // $name will be replaced with `Joel` echo "<p>Hello $name, Nice to see you.</p>"; # ...

This is one of the simplest lambda function. It is equivalent to Hello World program. To create your first program follow the below mentioned steps. Login to AWS Console Click Lambda under compute Click create a Lambda Function Skip select blueprint section In configure trigger click on the...