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How to implement FirebaseRealTime database in android application. Following is the steps for do it. First install firebase sdk, If you dont know how to install then following is the URL for help. Install Firebase SDK After thet register your project in firbase console, URL of the firbas...

public ActionResult Hello() { // Returns a user-defined content type, in this case a string. return Content("hello world!"); } Action methods typically return a result that is known as an action result. The ActionResult class is the base class for all action results. The Ac...

public ActionResult LoadPage() { Student result = getFirst(); //Returns a serialized JSON object. return Json(result, JsonRequestBehavior.AllowGet); } Action methods typically return a result that is known as an action result. The ActionResult class is the base class for al...

If you only want the fields houseNum and street in the address field in the final populated doc, use the populate() function as follows in the above two methods, Person.findOne({_id: req.params.id}) .populate('address', 'houseNum street') .exec(function(err, person) { // do somet...

If the built in attributes are not sufficient to validate your model data, then you can place your validation logic in a class derived from ValidationAttribute. In this example only odd numbers are valid values for a model member. Custom Validation Attribute public class OddNumberAttribute : Valid...

The following example is a very useful basis when you are trying to convert transaction data to un-pivoted data for BI/reporting reasons, where the dimensions which are to be un-pivoted can have a dynamic set of columns. For our example, we suppose that the raw data table contains employee assessme...

When sending a notification to an iOS device, you must set priority: "high" for it to wake up. Otherwise, the notification will not be received while the phone is asleep. Sets the priority of the message. Valid values are "normal" and "high." On iOS, these correspond...

OpenCL is low level api so it must be implemented in "C space" first. For that, one needs to download header files from Khronos' site. My hardware is AMD and capable of version 1.2, downloading opencl.h cl_platform.h cl.h cl_ext.h cl_egl.h cl_dx9_media_sharing.h cl_d3d10.h c...

mongodump --db mydb --gzip --out "mydb.dump.$(date +%F_%R)" This command will dump a bson gzipped archive of your local mongod 'mydb' database to the 'mydb.dump.{timestamp}' directory

mongorestore --db mydb mydb.dump.2016-08-27_12:44/mydb --drop --gzip This command will first drop your current 'mydb' database and then restore your gzipped bson dump from the 'mydb mydb.dump.2016-08-27_12:44/mydb' archive dump file.

XML <Dashavatar> <Avatar name="Matsya"/> <Avatar name="Kurma"/> <Avatar name="Varaha"/> <Avatar name="Narasimha"/> <Avatar name="Vamana"/> <Avatar name="Balabhadra"/> ...

XML <House> <numRooms>4</numRooms> <Floor number="1"> <Room name="living"/> <Room name="kitchen"/> </Floor> <Floor number="2"> <Room name="master bedroom&qu...

1.Download font-awesome from here. 2.Copy the font-awesome directory into your project. 3.In the of your html, reference the location to your font-awesome.min.css. <link rel="stylesheet" href="path/to/bootstrap/css/bootstrap.min.css"> <link rel="stylesheet&quot...

Suppose we want to have the following behaviour - We have a heading (say h3 element) and on clicking it, we want it to become an input box so that we can modify heading name. React makes this highly simple and intuitive using component states and if else statements. (Code explanation below) // I ha...

The first thing you want to do for local development is install ElasticSearch in your machine and test it to see if it is running. It requires Java to be installed. The installation is pretty straightforward: Mac OS X: brew install elasticsearch Ubuntu: sudo apt-get install elasticsearch Then...

ElasticSearch has a well-documented JSON API, but you'll probably want to use some libraries that handle that for you: Elasticsearch - the official low level wrapper for the HTTP API Elasticsearch-rails - the official high level Rails integration that helps you to connect your Rails models...

Ubuntu binaries are available for both 32-bit and 64-bit architectures source /etc/lsb-release && echo "deb http://download.rethinkdb.com/apt $DISTRIB_CODENAME main" | sudo tee /etc/apt/sources.list.d/rethinkdb.list wget -qO- https://download.rethinkdb.com/apt/pubkey.gpg | sudo a...

Downloading Prerequisites: We provide native 64-bit binaries for Windows 7 and above. A 64-bit version of Windows is required. Download the ZIP archive and unpack it in a directory of your choice. The Windows port of RethinkDB is a recent addition and hasn't received as much tuning as the Linux a...

Sample XML <Students> <Student> <Name> <First>Ashley</First> <Last>Smith</Last> </Name> <Grades> <Exam1>A</Exam1> <Exam2>B</Exam2> ...

Sample XML <Students> <Student> <Name> <First>Ashley</First> <Last>Smith</Last> </Name> <Grades> <Exam1>A</Exam1> <Exam2>B</Exam2> ...