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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 - Dynamic, Open source programming language

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Hey all... CodeCircle is back with a new programming language. This article is intended to give you a basic introduction to Ruby programming language. Ruby is a Dynamic, Open source programming language which is mainly focused on simplicity and productivity. This language is completely a free language which is developed by  Yukihiro Matsumoto.  This article will help you to get a fresh start in Ruby. "Hello World...!" As the first command in Ruby, we will look how to print a statement in Ruby. Basically, the print statement can be printed using two methods, 1) puts method The built-in method puts used to print a statement. The strings are printed using single or double quotes. Given below is the command used to print the statement "Hello World...!". puts "Hello World...!" Try this command 2) print method Another built-in method is Print which can be shown as below. print "Hello World...!" Try this command In Rub...
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SQL JOINS

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If you are familiar with SQL, you might have written queries to fetch data using a single table. But SQL joins are used to fetch data from two or more tables. This can be considered as one of the most benefited features enable in SQL. Lets see how we can use SQL joins to fetch data . Rather than storing the same data in multiple tables,by using this method one table will keep a reference to a ID of the other table. This approach is more efficient  and lets see we can do this using SQL joins. Types of Joins In MySql we can see there are mainly three joins , INNER JOIN LEFT JOIN RIGHT JOIN 01. INNER JOINS In INNER JOIN,  the query selects all the rows from both tables where there is a match between the columns in both tables. SQL Query SELECT column_name(s) FROM table1 INNER JOIN table2 ON table1.column_name=table2.column_name; Here the INNER JOIN is Specified by the ON keyword which is in the syntax. Example : Lets see How t...
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