Server Codes

What is Redux? Redux is quite an excellent State Management Framework. It's used with React.js library . To understand what is redux we have to learn what is the state. State state is the place where the data comes from. Our state as simple as possible and minimize the number of stateful components. This is the Javascript object that stores a component's behavior. state is dynamic, it enable a component to keep track of changing information in between renders and for it to be dynamic and interactive. It can only be used within a class component. State is similar to props but unlike props . It is private to a component and is controlled solely by he said component. state is accessed using this.state as well as State is initiated using this.state . But, all subsequent changes to state are made using this.setState. this.setState ensures that the components affected by he change in state are re-rendered in the browser. The main difference between state and props

One of the best use of constructor is to define the initial state of the component, which is very useful for any reactjs application.We could bind any event that occurs in our component into the constructors. It can be used to bind event handlers to the component and initializing the local state of the component. The constructor() method is fired before the component is mounted and like most things in React. has a few rules that you should follow when using it. in Call super(props) before this.props using constructor(props){ super(props); console.log(this.props); } In javascript super refers to the parent class constructor. Importantly, you can't use this in a constructor until after you've called the parent contructor. There's a good reason for why Javascript enforce that parent constructor runs before touch this.  JavaScript enforces that if you want to use   this   in a constructor, you  have to  call   super   first . Never setState() insi

Here we learn how to create Stored Procedure. Step 01 : Login SQL the SQL Server with server name and password  Step 02 : Switch your database.   Once you login SQL Server, on the left hand side you could see  Object Explorer  , through this you can switch your database under the  DATABASE   field. If you on click Database field it will list all the databases which are under your server. Choose your database which you have decided to write SQL Stored procedure. Stored procedure section comes inside the  Your_Database_Name -> Programmability -> Stored Procedure When you on click the Stored Procedure Section , you can see Stored Procedure Option. Select it. This will create empty stored procedure. It will looks like below code. -- ================================================ -- Template generated from Template Explorer using: -- Create Procedure (New Menu).SQL -- -- Use the Specify Values for Template Parameters -- command (Ctrl-Shift-M) to fill i

The main purpose of stored procedures to hide direct SQL queries from the code and improve performance of database operations such as SELECT, UPDATE, and DELETE data.SQL stored procedure is a collection of SQL commands and SQL logic. It also can be use as caches and reused. Type of stored procedure There are two types of stored procedure: User defined stored procedure System defined stored procedure User defined stored procedure It developed by database developer or database administrators. These Stored Procedure contains one or more SQL statements to SELECT, UPDATE or DELETE records from database table. It can take input parameters and produce output parameters.It is a mixture of Data Definition Language and Data Manipulation Language commands. User Defined Stored Procedure can classified into two types: T-SQL Stored Procedure                        Transact SQL (T-SQL) Stored Procedures receive and return parameters. It process the INPUT, UPDATE and DELETE que

We can easily said that firewall is a program which is prevents unauthorized access to or from a private network. Firewalls are tools that can be used to enhance the security of computers connected to a network, such as LAN or the Internet. They are an integral part of a comprehensive security framework for your network. What firewall do? Defend resources Validate access Manage and control network traffic Record and report on events Act as an intermediary A Personal firewall is important when You surf the Internet at home using an 'always on' broadband connection You connect to the Internet via a public WiFi network in a park, cafe or airport You run a home network which needs to be kept isolated from the Internet You wish to be kept informed when any program on your computer attempts to connect to the Internet Most Personal Firewalls are highly configurable so you can easily create security policies to suit your individual needs.

Hi folks, Here I want to discussing about cloud computing. Most of the person may be heard about cloud computing. Cloud computing referred as  "PAY AS YOU GO" it means you can use the software ,operating system, database , servers or any other services as your needed periods. while you are using the system you can pay for it. Here we can shortly lookup what are the benefits on cloud computing. Flexibility. Disaster recovery. Automatically software updates. Capital-expenditure free. Cloud Services   SAAS : This acronym is refereed as Software As A Services. It is being used by normal end users who don't have much aware of the software and their purpose is just using it. eg:- Google drive, Facebook, Salesforce ,Yahoo mail and etc. PAAS : This acronym is refereed as Platform As A Services. It is being used by developers. They can build , compile and run heir programs without worrying of the underlying infrastructure. eg :- windows azure, LongJump, Ama

Quick Inro of Amazon Web Services.  Amazon web services is a leader of the cloud computing platform provided by amazon.com which is a pioneer of Internet services. 57% of the cloud services are provided amazon web services. AWS services and product   Compute :  Amazon EC2 Amazon Elastic Beanstalk Amazon Lambola Auto scaling Elastic load blancer Amazon VPC Storage : Amazon S3 Amazon cloud front Amazon EBS Amazon Glacier AWS snowball AWS storage gateway Database : Amazon RDS Amazon DynamoDB Amazon Elastic Cache Amazon Redshift  Networking : Amazon VPC AWS Direct connect Elastic load Balancer Amazon Route S3 Management tool : Amazon cloud waste AWS cloud information AWS cloud trail AWS Ops Works AWS trusted advisor Security & identity : AWS identity Access Management(IAM) AWS key management services (KMS)  Application services : Amazon AES Amazon SNS Amazon SQS