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AngularFire2 Set up

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In order to use Firebase as your database in Angular2 project it is essential to import AngularFire2 library to your project.For this you can refer the GitHub documentation   and get an idea. At first you have to import the library using the following code. npm install firebase angularfire2 --save Now move on to your app.module.ts file of your project and import the library. using the below code. import { AngularFirestore } from ' angularfire2/firestore ' ; And then you need to export the configuration in the same file.Use the below code to change according to your project. export const   firebaseConfig={ apikey :'', authDomain:'', databaseURL:'', storageBucket:'', messagingSenderID:'' }; Obtain the configurations according to your project through your firebase project.There you will get a similar window as below. Now import the Module using the following code. AngularFireModule.initializeApp(firebaseConfig...
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Ruby - Variables and Constants

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This article will focus on variables and constants in Ruby. Variables Variables are used as a location to store a value. Variables are assigned using equal (=) sign. Eg: x=5 Constants Variables which starts with a capital letter is a constant where it's value cannot be changed. Eg: MyNum = 20 Below output will be given when assigning a value to a constant variable. Try out the code to get a more clear idea.
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How the database works in Firebase

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From previous articles we went through a brief introduction on Firebase. After creating the database to the project the data should be added to the database.Now connect your firebase project with your web project. Now in your firebase dashboard click the database tab.Now you will get a similar window given below. Click real time database as we are creating a realtime database.Now you will get the below window where an object of the web project is already created. Now click the the plus mark which is on the object to create a new table. Here you have given two fields on Name and value. you have to enter the name and the value.And also the Firebase database is a similar to a tree diagram where you should create your tables based on it. As an example I will create my database based on the tables given below.  Given below is my created database based on the above two tables. If you click a particular key that you have created, the link above will automati...
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