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Top Five Reasons to Become a Full Stack Developer

Do you have an inclination for dabbling with technology? Are you interested in figuring out how websites work? Eager to learn more about the world of Full-Stack Development? Dig in!While some prefer the artistic and creative side of web development, others are drawn to the technical one. There’s a third group of people who are masters of both these aspects. The first group is that of front-end developers, the second is of back-end developers, and the third that of full-stack developers.Most modern web applications today require over 20 different job functions and developers who can navigate across these various functions across the stack are highly valuable. Full-stack developers are always in vogue and much sought after both in startups as well as leading enterprises owing to their versatility, ability to step in and troubleshoot areas across the technology ecosystem that goes into building a winning product, and their contribution to speed and cost-effectiveness.From mobile-first strategies, product testing through MVP (minimum viable product) cycles, app development, and creating exceptional UI/UX, a full-stack developer enables it all. Before we dive into everything you’ll have going for you once you become a skilled full-stack developer, let’s understand what a full-stack is and what a full-stack developer actually does.What is Full-Stack Development?Full-stack development refers to the development of both the front-end and back-end of a web application or website. But first, what’s ‘full stack’?A full stack is made up of the front-end that deals with the user interface, the back-end that deals with data validation, and the database that acts as storage—a repository of information from the front-end through the logic layer.‘Full stack’ refers to the collection of multiple components in a software application that work together to ensure its smooth running—this includes software products, patches, coding frameworks, servers, operating systems, database tools, and more.Each of these components come together to facilitate user interaction, to run calculations, and to power back-end functions: a full stack.Each full stack uses different tools, frameworks, and technologies. To become a Full-Stack developer, you need to acquire the skills to use the associated front and back-end languages, tools, and frameworks so you can create your own application from start to finish.What Does a Full-Stack Developer Do?A FULL-STACK DEVELOPER designs and builds dynamic data-driven websites and applications using a rich ensemble of technologies, techniques and workflows that serve both the end user and the back-end infrastructure.The word ‘stack’ simply refers to an amalgamation of technologies and products that form the technical ecosystem and backbone needed to build and operate the product.A stack is typically made up of a database such as MongoDB, MySQL, and others, an application framework such as Express, Rails or Laravel, a platform or runtime such as Node.js, PHP or Ruby and a client-side web application framework such as React, Angular or Vue. Depending on the project requirement, different kinds of stacks like MEAN, MERN, LAMP stack, Ruby on Rails, and many other stacks are required and used.Full-Stack Developers are Jacks of multiple trades, handling both the front-end and the back-end, including servers, databases, and even clients. A Full-Stack Developer must be able to work with all the components of a stack to ensure they work together efficiently.Why Should You Consider a Full-Stack Development Career?Full-stack development is not only about learning various front-end and back-end technologies. It's also about understanding the two areas in sufficient detail and making communication between them easy and smooth.As technologies and industries evolve, Full-Stack developers will need to learn new technologies to stay abreast of the latest trends. This broad range of skills across the stack is a superpower for software developers.If you’re a fresher looking to break into your tech career or a mid-career professional looking to enter the world of tech from a non-tech profession, you should consider the following advantages of becoming a full-stack developer:1. Full-Stack Development opens multi-faceted scope for growthCompanies are no longer in pursuit of specialists in software development. The preference is towards full-stack developers who are multi-faceted and cultivate a mindset to constantly upskill themselves.There is huge scope for accelerated growth as companies resort to this broad skillset that brings in speed and cost-effectiveness for their businesses. Full-stack developers boast of a fast-tracked, multi-dimensional career growth across companies ranging across globally valued end-to-end enterprise solutions and startups.Full-stack engineers typically begin their careers as front-end or back-end developers at the entry-level, quickly moving up ranks as they perfect their technical skills. Practice-oriented bootcamps that provide you work-like experience can help you master every aspect of development and get you industry ready in a relatively short time and are a great alternative to this.2. Full-Stack Development is one of the highest paid jobsFull-stack development is one of the highest-paid jobs across the globe due to its impact on business and marketing. This versatile approach to development helps organizations distinguish themselves and catalyses revenue growth.According to ZipRecruiter, the average salary of an entry-level full-stack developer is $58,040 annually in the US. For mid-level developers, it is $97,500 a year, and $116,504 for experienced ones. Even Indeed points out that the average annual salary figure sits at $113,462 a year in the US, and between £40,000 - £70,000 in the UK.While full-stack programming is one of the most rewarding tech jobs, the remuneration of a full-stack developer depends on factors such as core skills, additional skills (databases, UI/UX basics, etc.), and the location of the organization, demographics, and experience.3. Full-Stack Development enables rapid project deliveryTasks related to integration, updates, front-end, and back-end coordination, and meeting client expectations—all fall within the scope of a full-stack developer role. Not only does this help in lowering the dependencies on other teams—which often delays execution—it speeds up the development cycle and brings in cost efficiencies.If you’re a full-stack developer, you also need to be well versed with the Agile Project Management (APM) framework, Scrum, and its building blocks. The job profile also mandates effective communication with team members to streamline development processes.A full-stack developer learns to deliver results quickly with a toolkit that constitutes the most efficient tools in the industry, enabling smart and fast work.4. Full-Stack development is all about building versatilityA full-stack developer is a one-stop-solution of sorts for companies. The onus of handling different stages of the project right from initiating the project, basic level of development, key project contributions both on front-end and back-end, as well as managing the UI/UX as per client feedback falls on the full-stack developer. This gives them great responsibility, dependability, and credit for successful project execution.Full stack developers, with their multi-dimensional skillset are equipped to step in anywhere across the development spectrum to provide an end-to-end solution. Tech companies appreciate and value them for their versatility across the stack, which translates to speed to market.Learning full-stack development will help you master a wide set of skills ranging from HTML, CSS, JavaScript, back-end languages (Python, PHP, Ruby), database storage, HTTP, REST, and NPM, along with a good set of Agile project management and soft skills.5. With greater productivity comes greater responsibilityFull-stack developers get to work with the client-side as well as the server-side of the application. This gives the developer more control over the product and makes way for far more creative flexibility. The ability to see the big picture empowers full-stack developers to make decisions faster, giving them an edge over other developers.The broad range of skills across the stack and the creative liberty coupled with good judgment skills is what increases the overall productivity of full-stack developers, empowering them to be self-reliant and move the needle on the development better and faster.How to Get Future-Ready with Full-Stack DevelopmentWhether you have a tech background or are starting from a blank slate, with a passion to learn and a well-structured program coupled with hands-on practice, you can go from zero to an advanced level where you’ll be able to contribute right away to projects.Figuring out what projects to build is half the battle won and that’s where a Full-Stack Dev Bootcamp like KnowledgeHut’s adds immense value. At the end of the bootcamp, you will have a portfolio of real-world projects deployed on GitHub, working through an immersive project-based curriculum focused on practical developer skills.The program equips you with world-class mentorship and real work-like experiences, enabling you to build internship-grade projects in an actual developer environment. You will deploy project portfolios on GitHub that you can impress recruiters with during your interviews.The demand for full-stack developers will steadily increase in the market as new technologies enter. While the opportunity comes with its bells and whistles, the developers who will get ahead are the ones who will constantly keep abreast of the latest and continually hone their full-stack development skills.If you’re interested to learn more about the full-stack and gain more insights on how KnowledgeHut can help you position yourself to crack a full-stack or front-end role in top tech companies, be sure to look up our Full-Stack Development Bootcamp. Designed to get you hired, the program offers live instructor-led sessions, hands-on practice with Cloud Labs, on-demand self-paced learning, one-on-one mentorship, capstone projects, assignments, assessments, quizzes and more.Ready to become a Full-Stack Developer? Join the Full-Stack Career Track Bootcamp!

Top Five Reasons to Become a Full Stack Developer

4K
Top Five Reasons to Become a Full Stack Developer

Do you have an inclination for dabbling with technology? Are you interested in figuring out how websites work? Eager to learn more about the world of Full-Stack Development? Dig in!

While some prefer the artistic and creative side of web development, others are drawn to the technical one. There’s a third group of people who are masters of both these aspects. The first group is that of front-end developers, the second is of back-end developers, and the third that of full-stack developers.

Most modern web applications today require over 20 different job functions and developers who can navigate across these various functions across the stack are highly valuable. Full-stack developers are always in vogue and much sought after both in startups as well as leading enterprises owing to their versatility, ability to step in and troubleshoot areas across the technology ecosystem that goes into building a winning product, and their contribution to speed and cost-effectiveness.

From mobile-first strategies, product testing through MVP (minimum viable product) cycles, app development, and creating exceptional UI/UX, a full-stack developer enables it all. Before we dive into everything you’ll have going for you once you become a skilled full-stack developer, let’s understand what a full-stack is and what a full-stack developer actually does.

What is Full-Stack Development?

Full-stack development refers to the development of both the front-end and back-end of a web application or website. But first, what’s ‘full stack’?

A full stack is made up of the front-end that deals with the user interface, the back-end that deals with data validation, and the database that acts as storage—a repository of information from the front-end through the logic layer.

Full-Stack Development

‘Full stack’ refers to the collection of multiple components in a software application that work together to ensure its smooth running—this includes software products, patches, coding frameworks, servers, operating systems, database tools, and more.

Each of these components come together to facilitate user interaction, to run calculations, and to power back-end functions: a full stack.

Each full stack uses different tools, frameworks, and technologies. To become a Full-Stack developer, you need to acquire the skills to use the associated front and back-end languages, tools, and frameworks so you can create your own application from start to finish.

What Does a Full-Stack Developer Do?

A FULL-STACK DEVELOPER designs and builds dynamic data-driven websites and applications using a rich ensemble of technologies, techniques and workflows that serve both the end user and the back-end infrastructure.

The word ‘stack’ simply refers to an amalgamation of technologies and products that form the technical ecosystem and backbone needed to build and operate the product.

A stack is typically made up of a database such as MongoDB, MySQL, and others, an application framework such as Express, Rails or Laravel, a platform or runtime such as Node.js, PHP or Ruby and a client-side web application framework such as React, Angular or Vue. Depending on the project requirement, different kinds of stacks like MEAN, MERN, LAMP stack, Ruby on Rails, and many other stacks are required and used.

Full-Stack Developers are Jacks of multiple trades, handling both the front-end and the back-end, including servers, databases, and even clients. A Full-Stack Developer must be able to work with all the components of a stack to ensure they work together efficiently.

Why Should You Consider a Full-Stack Development Career?

Full-stack development is not only about learning various front-end and back-end technologies. It's also about understanding the two areas in sufficient detail and making communication between them easy and smooth.

As technologies and industries evolve, Full-Stack developers will need to learn new technologies to stay abreast of the latest trends. This broad range of skills across the stack is a superpower for software developers.

If you’re a fresher looking to break into your tech career or a mid-career professional looking to enter the world of tech from a non-tech profession, you should consider the following advantages of becoming a full-stack developer:

1. Full-Stack Development opens multi-faceted scope for growth

Companies are no longer in pursuit of specialists in software development. The preference is towards full-stack developers who are multi-faceted and cultivate a mindset to constantly upskill themselves.

There is huge scope for accelerated growth as companies resort to this broad skillset that brings in speed and cost-effectiveness for their businesses. Full-stack developers boast of a fast-tracked, multi-dimensional career growth across companies ranging across globally valued end-to-end enterprise solutions and startups.

Full-stack engineers typically begin their careers as front-end or back-end developers at the entry-level, quickly moving up ranks as they perfect their technical skills. Practice-oriented bootcamps that provide you work-like experience can help you master every aspect of development and get you industry ready in a relatively short time and are a great alternative to this.

2. Full-Stack Development is one of the highest paid jobs

Full-stack development is one of the highest-paid jobs across the globe due to its impact on business and marketing. This versatile approach to development helps organizations distinguish themselves and catalyses revenue growth.

According to ZipRecruiter, the average salary of an entry-level full-stack developer is $58,040 annually in the US. For mid-level developers, it is $97,500 a year, and $116,504 for experienced ones. Even Indeed points out that the average annual salary figure sits at $113,462 a year in the US, and between £40,000 - £70,000 in the UK.

While full-stack programming is one of the most rewarding tech jobs, the remuneration of a full-stack developer depends on factors such as core skills, additional skills (databases, UI/UX basics, etc.), and the location of the organization, demographics, and experience.

3. Full-Stack Development enables rapid project delivery

Tasks related to integration, updates, front-end, and back-end coordination, and meeting client expectations—all fall within the scope of a full-stack developer role. Not only does this help in lowering the dependencies on other teams—which often delays execution—it speeds up the development cycle and brings in cost efficiencies.

If you’re a full-stack developer, you also need to be well versed with the Agile Project Management (APM) framework, Scrum, and its building blocks. The job profile also mandates effective communication with team members to streamline development processes.

A full-stack developer learns to deliver results quickly with a toolkit that constitutes the most efficient tools in the industry, enabling smart and fast work.

4. Full-Stack development is all about building versatility

A full-stack developer is a one-stop-solution of sorts for companies. The onus of handling different stages of the project right from initiating the project, basic level of development, key project contributions both on front-end and back-end, as well as managing the UI/UX as per client feedback falls on the full-stack developer. This gives them great responsibility, dependability, and credit for successful project execution.

Full stack developers, with their multi-dimensional skillset are equipped to step in anywhere across the development spectrum to provide an end-to-end solution. Tech companies appreciate and value them for their versatility across the stack, which translates to speed to market.

Learning full-stack development will help you master a wide set of skills ranging from HTML, CSS, JavaScript, back-end languages (Python, PHP, Ruby), database storage, HTTP, REST, and NPM, along with a good set of Agile project management and soft skills.

5. With greater productivity comes greater responsibility

Full-stack developers get to work with the client-side as well as the server-side of the application. This gives the developer more control over the product and makes way for far more creative flexibility. The ability to see the big picture empowers full-stack developers to make decisions faster, giving them an edge over other developers.

The broad range of skills across the stack and the creative liberty coupled with good judgment skills is what increases the overall productivity of full-stack developers, empowering them to be self-reliant and move the needle on the development better and faster.

How to Get Future-Ready with Full-Stack Development

Whether you have a tech background or are starting from a blank slate, with a passion to learn and a well-structured program coupled with hands-on practice, you can go from zero to an advanced level where you’ll be able to contribute right away to projects.

Figuring out what projects to build is half the battle won and that’s where a Full-Stack Dev Bootcamp like KnowledgeHut’s adds immense value. At the end of the bootcamp, you will have a portfolio of real-world projects deployed on GitHub, working through an immersive project-based curriculum focused on practical developer skills.

The program equips you with world-class mentorship and real work-like experiences, enabling you to build internship-grade projects in an actual developer environment. You will deploy project portfolios on GitHub that you can impress recruiters with during your interviews.

The demand for full-stack developers will steadily increase in the market as new technologies enter. While the opportunity comes with its bells and whistles, the developers who will get ahead are the ones who will constantly keep abreast of the latest and continually hone their full-stack development skills.

If you’re interested to learn more about the full-stack and gain more insights on how KnowledgeHut can help you position yourself to crack a full-stack or front-end role in top tech companies, be sure to look up our Full-Stack Development Bootcamp. Designed to get you hired, the program offers live instructor-led sessions, hands-on practice with Cloud Labs, on-demand self-paced learning, one-on-one mentorship, capstone projects, assignments, assessments, quizzes and more.


Ready to become a Full-Stack Developer? Join the Full-Stack Career Track Bootcamp!

KnowledgeHut

KnowledgeHut

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KnowledgeHut is an outcome-focused global ed-tech company. We help organizations and professionals unlock excellence through skills development. We offer training solutions under the people and process, data science, full-stack development, cybersecurity, future technologies and digital transformation verticals.
Website : https://www.knowledgehut.com

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Angular: Add service to module Code Example

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Create GraphQL API with example

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For this, you will be using LowDB, which is a simple file based JSON database for small projects in the localhost. Then you will be needing middleware to connect our database system to the requesting frontend application. For this, you will be using the Express middleware with the GraphQL implementation of Express - the Graphql-express library. Finally, you will be making a client-side application using react which can request all the data from the local database and can perform operations on the database like read, write, and delete.So, our roadmap is simple and straightforward. Create a Database Schema > Use a middleware server to query the database > Create a frontend application to use the data. If this is too much at once for you, do not worry as this is article is being written keeping in mind that the reader is a first-timer for GraphQL and basic querying as usual. Now, let’s dive into the code.Setting up Express GraphQLLet’s begin with the basic project structure of a Node.js application. Begin a new project in a new folder.$ mkdir graphql-example $ cd graphql-exampleUse NPM to intiialize a project$ npm init -yInstall the required dependencies for Express, MongoDB (Mongoose), and some additional dependencies required for the function of Express.$ npm install express mongoose body-parser cors --saveApollo Server is a community-maintained open-source GraphQL server that works with all Node.js HTTP server frameworks, so next, you are going to download and save that.$ npm install apollo-server-express --saveThis should’ve created a package.json and a package-lock.json file within your folder. These files contain information regarding our environment, the dependencies, and the specific versions to run those dependencies.This means our environment is ready and you can now start developing the integrated server and API. We are going to write the Schema inside the index.js file. In the index.js file, start off by writing this code.const express = require('express'); const mongoose = require('mongoose'); const schema = require('./schema'); const bodyParser = require('body-parser'); const cors = require('cors'); const { ApolloServer } = require('apollo-server-express'); const url = "mongodb://localhost:27017/moviesdb"; const connect = mongoose.connect(url, { useNewUrlParser: true }); connect.then((db) => {       console.log('Connected correctly to server!'); }, (err) => {       console.log(err); }); const server = new ApolloServer({       typeDefs: schema.typeDefs,       resolvers: schema.resolvers }); const app = express(); app.use(bodyParser.json()); app.use('*', cors()); server.applyMiddleware({ app }); app.listen({ port: 4000 }, () =>   console.log(`Server ready at  http://localhost:4000${server.graphqlPath}`));In lines number 1 to 6, you’re implementing the necessary modules. Note that here you have imported the ./schema, but you haven’t created that yet. We will be doing this in the next step.In lines number 9 to 14, you are connecting the project to the MongoDB database and logging any error you face to the console.In lines number 16 to 19, you’re creating a new Apollo Server with typeDefs and Resolver. We’ll be defining those in the ./schema later in this tutorial.In lines 21 to 26, you’re firing up the Express Server at port 4000, when you will actually be able to interact with what you’re building.GraphQL has two main principles to work: types and resolvers. We defined them in Apollo Server. We’ll import them from the file you’ll create later.Next, let’s create the file models/movie.js that’ll contain the movie-Mongoose model.const mongoose = require('mongoose'); const Schema = mongoose.Schema; const movieSchema = new Schema({     name: {        type: String,        required: true     },     rating: {        type: Number,        required: true     },     producer: {        type: String,        required: true    } }, {     timestamps: true }); var Movies = mongoose.model('Movie', movieSchema); module.exports = {Movies, movieSchema};We’re going to build a simple movie app, where you can show, add, edit, and delete movies. That way you’ll get through the basics of GraphQL, which is the main goal of this tutorial.In lines 4 to 19, you’re basically determining the schema of the database that is going to hold the data of movies. Every movie is going to have a Name and a Producer of type String and a Rating of type Number.Designing the SchemaLet’s move on to the schema.js file where you’re going to build our GraphQL API.Create a new file in the root of the folder by the name of schema.js and add the following code.const { gql } = require('apollo-server-express');   const Movie = require('./models/movie').Movies;   const typeDefs = gql `    type Movie {      id: ID!      name: String!      producer: String!      rating: Float!  }  type Query {    getMovies: [Movie]    getMovie(id: ID!): Movie  }  type Mutation {      addMovie(name: String!, producer: String!, rating: Float!): Movie      updateMovie(id: ID!, name: String!, producer: String!, rating: Float): Movie      deleteMovie(id: ID!): Movie    } `In this, you’re building the schema. We defined the Movie type which will have an ID, the name of the movie and the producer, and a rating of type Float. The “!” after the types shows that these fields are necessary.Unlike the REST approach of getting different tasks done at different endpoint URLs, GraphQL can create operations in a single endpoint. That is what you have done in line 11 onwards. The type Query determines the GET operations, and type Mutation determines the modification operations like POST, DELETE, etc. In getMovies, you’re returning a list of all available movies in our database, and in getMovie, you’re getting the specific movie by the ID of that movie.Now you’re going to link these with the Mongoose Database queries that are going to perform the actions in the database. And this is done by Resolvers. Resolvers are a collection of functions that connect schema fields and types to various backends. It can read, write, and delete data from and to anywhere in the database, be it SQL, NoSQL, or Graph-based database. In simple terms, they act as a GraphQL query handler. Here’s how you’re going to implement Resolvers in our code:const resolvers = {   Query: {     getMovies: (parent, args) => {       return Movie.find({});     },     getMovie: (parent, args) => {       return Movie.findById(args.id);     }   },   Mutation: {     addMovie: (parent, args) => {       let movie = new Movie({         name: args.name,         producer: args.producer,         rating: args.rating,       });       return movie.save();     },     updateMovie: (parent, args) => {       if (!args.id) return;         return Movie.findOneAndUpdate(          {            _id: args.id          },          {            $set: {              name: args.name,              producer: args.producer,              rating: args.rating,            }          }, {new: true}, (err, Movie) => {            if (err) {              console.log('Something went wrong when updating the movie');            } else {              continue;            }          }       );     }   } } module.exports = {typeDefs,resolvers};This is the basic logic of MongoDB and CRUD applications, which doesn’t come under the scope of this article, since it is majorly focused on GraphQL. However, the logic is simple and straightforward for anyone to understand, so skim through it once.With this, you’re done with a basic Movie API that can perform all the CRUD operations on a database of movies. To test this out, you’re going to fire up our node server and open the browser in http://localhost:4000/graphql which will open the GraphQL Playground.$ node index.js Server ready at http://localhost:4000/graphqlOnce the Playground UI opens, you’re first going to create a Movie Record for the database since it would initially be empty.mutation { addMovie(name: “GraphQL Movie”, producer: “Facebook”, rating:  4.5) { id, name, rating, producer } }OUTPUT:{ “data” : { “addMovie”: { “id”: “5j2j1lnk1LNS231MLK3”, “name”: “GraphQL Movie”, “producer”: “Facebook”, “rating”: 4.5 } } }And now let’s list out all the movies in the database with only their “name” and “rating”.query { getMovies: { name, rating } }OUTPUT:{ “Data”: { “getMovies”: [ { “name”: “GraphQL Movie”, “rating”: 4.5 } ] } }So, you have successfully created a Movie API where you can perform all the CRUD operations on a single endpoint, and also ask for just the data that you want.  This results in a blazing fast API response and a developer-friendly return object that makes development fast and easy.Using GraphQL with ReactUsing GraphQL with react is super easy and can make full-stack development look like a piece of cake. We’re going to build a react app that uses the Movie API you just built to render the results on a frontend client app.Start off by installing the required dependencies.$ npm install create-react-app graphql @apollo/clientCreate a new React appnpx create-react-app movies-appLet’s start off by initializing an ApolloClient instance. In index.js let's first import the symbols you need from @apollo/client, Next, you'll initialize ApolloClient, passing its constructor a configuration object with URI and cache fields:import {   ApolloClient,   InMemoryCache,   ApolloProvider,   useQuery,   gql } from "@apollo/client"; const client = new ApolloClient({   uri: 'https://48p1r2roz4.sse.codesandbox.io',   cache: new InMemoryCache() });The URI specifies the GraphQL Server URL.That’s it! Our client app is ready to fetch data from the GraphQL server. In index.js, let’s wrap our React app with the ApolloProvider Component. Put up the ApolloProvider somewhere high in the app, above any component that might need to access GraphQL data.function App() {   return (           My first GraphQL app       ); } render(         ,   document.getElementById('root'), );With this being done, our client app is now ready to request data from the server and perform queries on the frontend. We can do this using the useQuery React Hook that shares the GraphQL data with the UI.In the index.js, let’s first define the query you want to execute.const MOVIES = gql`   query getMovies {      name,      producer   } `;Next, let's define a component called GetMovies that executes our getMovies query with the useQuery hook:function GetMovies() {   const { loading, error, data } = useQuery(MOVIES);   if (loading) return Loading...;   if (error) return Error :(;   return data.map(({ name, producer }) => (                   {name}: Produced by {producer}             )); }Whenever this component renders, the useQuery hook automatically executes our query and binds the results to the data property on successful completion of the query.Finally, you'll add GetMovies to our existing component tree:function App() {   return (           My first Apollo app             ); }When your app reloads, you should briefly see a loading indicator, followed by a list of Movies present in the MongoDB database.Congratulations. You just made a React app that uses GraphQL to render data from the server. Give yourself a pat on the back for this one.Dev-friendly Query Languages are the FutureSo, wrapping it all up in a few more lines. In this tutorial, you learned what GraphQL is - a new age Query Language that is data specific and client-oriented, how is it different (and better) than REST architecture - it is developer friendly, blazing-fast, and easy to learn or understand. We also made a mock API of Movies using GraphQL and MongoDB and performed the CRUD operations using just one single endpoint URL - another benefit over the RESTful architecture. And finally, you went on to create a React application that uses these benefits of GraphQL and combines them with the benefits of React to give a hyper-fast, easy, and full-stack app that renders Movies on request.We hope you learned something new from this article. Once you’ve started this journey of GraphQL, it is a fun ride ahead since it is a relatively new tech and not many people out there are having this skill under their hood. So, make use of this opportunity and outshine the rest.Keep Learning.
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Create GraphQL API with example

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How to use Timers in Node.js

You can use Node.js's utilities to schedule the execution of your code. The timer module, unlike most Node.js modules, is not imported. To comply with the JavaScript browser API, the methods are globally accessible.The Node.js Timers module contains several functions that allow you to execute a block of code or a function after a specified amount of time. You don't need to use require() to import the Timers module because it's global.In this post, I'll explain and demonstrate what timers are, how to use them, how the syntax looks, and how you can use them in your applications. For example, if you want to retrieve data from a REST API at a specific interval, you can easily do so with timers. So, even if you are unfamiliar with JavaScript or timers, this post will help you understand these concepts.The Event Loop - A Quick PrimerNode.js is a single-threaded, event-driven platform that can run non-blocking, asynchronous code. These Node.js features make it memory efficient. Even though JavaScript is single-threaded, the event loop enables Node.js to perform non-blocking I/O operations. It is accomplished by delegating tasks to the operating system whenever and wherever possible.Because most operating systems are multi-threaded, they can handle multiple operations that are running in the background. When one of these operations is finished, the kernel notifies Node.js, and the callback associated with that operation is added to the event queue, where it will eventually be executed.Features of Event Loop:An event loop is an infinite loop that waits for tasks, executes them, and then sleeps until more tasks are received.When the call stack is empty, i.e., there are no ongoing tasks, the event loop executes tasks from the event queue.We can use callbacks and promises in the event loop.The event loop executes the tasks in reverse order, beginning with the oldest.Example:console.log("One"); setTimeout(function(){ console.log("Two"); }, 1000); console.log("Three");Output:OneThreeTwoThe first console log statement is pushed to the call stack in the above example, and "One" is logged on the console before the task is popped from the stack. Following that, the setTimeout is added to the queue, the task is sent to the operating system, and the task's timer is set. After that, this task is removed from the stack. The third console log statement is then pushed to the call stack, "Three" is logged on the console, and the task is removed from the stack.Timers in JavaScriptA timer is used in JavaScript to execute a task or function at a specific time. The timer is essentially used to delay the execution of the program or to execute the JavaScript code at regular intervals. You can delay the execution of the code by using a timer. As a result, when an event occurs or a page loads, the code does not complete its execution at the same time.Advertisement banners on websites, which change every 2-3 seconds, are the best example of a timer. These advertising banners are rotated at regular intervals on websites such as Flipkart. To change them, you set a time interval.JavaScript provides two timer functions, setInterval() and setTimeout(), which help to delay code execution and allow one or more operations to be performed repeatedly.setTimeout():The setTimeout() function allows users to postpone the execution of code. The setTimeout() method accepts two parameters, one of which is a user-defined function, and the other is a time parameter to delay execution. The time parameter, which is optional to pass, stores the time in milliseconds (1 second = 1000 milliseconds).setInterval():The setInterval method is similar to the setTimeout() function in some ways. It repeats the specified function after a time interval. Alternatively, you can say that a function is executed repeatedly after a certain amount of time specified by the user in this function.Timers in Node.js - setTimeout()setTimeout() can be used to execute code after a specified number of milliseconds. This function is equivalent to window. setTimeout() from the browser JavaScript API, but no code string can be passed to be executed.setTimeout() takes a function to execute as the first argument and a millisecond delay defined as a number as the second. Additional arguments may be provided, and these will be passed to the function. As an example, consider the following:Using setTimeout()The timeout interval is not guaranteed to execute after that exact number of milliseconds. This is because any other code that blocks or holds onto the event loop will delay the execution of the timeout. The only guarantee is that the timeout will not be executed sooner than the timeout interval specified.setTimeout(function A() { return console.log('Hello World!'); }, 2000); console.log('Executed before A');clearTimeout():The clearTimeout() method deactivates a timer that was previously set with the setTimeout() method.The ID value returned by setTimeout() is passed to the clearTimeout() method as a parameter.Syntax:clearTimeout(id_of_settimeout)Example: function welcome () { console.log("Welcome to Knowledgehut!"); } var id1 = setTimeout(welcome,1000); var id2 = setInterval(welcome,1000); clearTimeout(id1);Timers in Node.js - setImmediate()To execute code at the end of the loop cycle, use the setImmediate() method. In layman's terms, this method divides tasks that take longer to complete, in order to run a callback function that is triggered by other operations such as events.Syntax:let immediateId = setImmediate(callbackFunction, [param1, param2, ...]); let immediateId = setImmediate(callbackFunction);The function to be executed will be the first argument to setImmediate(). When the function is executed, any additional arguments will be passed to it.Now consider the difference between setImmediate() and process. nextTick(), as well as when to use which.While processing, setImmediate() is executed in the Check handlers phase. process.nextTick() is called at the start of the event loop and at the end of each phase.process.nextTick() has higher priority than setImmediate():setImmediate(() => console.log('I run immediately')) process.nextTick(() => console.log('But I run before that'))Output:Using setImmediate()Multiple setImmediate functions are called in the following example. When you do this, the callback functions are queued for execution in the order in which they are created. After each event loop iteration, the entire callback queue is processed. If an immediate timer is queued from within an executing callback, it will not be triggered until the next iteration of the event loop.Example:setImmediate(function A() { setImmediate(function B() { console.log(1); setImmediate(function D() {   console.log(2); }); }); setImmediate(function C() { console.log(3); setImmediate(function E() {   console.log(4); }); }); }); console.log('Started');clearImmediate():The clearImmediate function is used to remove the function call that was scheduled by the setImmediate function. Both of these functions can be found in Node.js's Timers module.Example:console.log("Before the setImmediate call") let timerID = setImmediate(() => {console.log("Hello, World")}); console.log("After the setImmediate call") clearImmediate(timerID);Timers in Node.js - setInterval()This method, unlike setTimeout(), is used to execute code multiple times. For example, the company may send out weekly newsletters to its Edge as a Service customer. This is where the setInterval() method comes into play. It is an infinite loop that will continue to execute as long as it is not terminated (or halted).As the second argument, setInterval() accepts a function argument that will run an infinite number of times with a given millisecond delay. In the same way that setTimeout() accepts additional arguments beyond the delay, these will be passed on to the function call. The delay, like setTimeout(), cannot be guaranteed due to operations that may stay in the event loop and should thus be treated as an approximation.Syntax:let intervalId = setInterval(callbackFunction, [delay, argument1, argument2, ...]); //option 1 let intervalId = setInterval(callbackFunction[, delayDuration]); // option 2 let intervalId = setInterval(code, [delayDuration]); //option 3Using setInterval()Example:setInterval(function A() { return console.log('Hello World!'); }, 1000); // Executed right away console.log('Executed before A');setInterval(), like setTimeout() returns a Timeout object that can be used to reference and modify the interval that was set.In the above example, function A() will execute after every 1000 milliseconds.clearInterval():Example:var si = setInterval(function A() { return console.log("Hello World!"); }, 1000); setTimeout(function() { clearInterval(si); }, 4000);Using Timer.unref()The timer module is used to schedule functions that will be called later. Because it is a global API, there is no need to import (require("timers")) to use it.The Timeout Class contains an object (setTimeout()/setInterval()) that is created internally to schedule actions, and (clearTimeout()/clearInterval()) that can be passed to cancel those scheduled actions. When a timeout is set, the Node.js event loop will continue to run until clearTimeout() is called. The setTimeout() method returns timeout objects that can be used to control this default behaviour, and it exports both the timeout.ref() and timeout.unref() functions.timeout.ref():When the Timeout is active and (timeout.ref()) is called, it requests that the Node.js event loop not exit for an extended period of time. In any case, calling this Method multiple times has no effect.Syntax:timeout.ref()timeout.unref():When the Timeout is enabled, the Node.js event loop is not required to remain active. If any other activity keeps the event loop running, the Timeout object's callback is invoked after the process exits. In any case, calling this Method multiple times has no effect.Syntax:timeout.unref()Example:var Timeout = setTimeout(function alfa() { console.log("0.> Setting Timeout", 12); }); console.log("1 =>", Timeout.ref()); Timeout.unref() Timeout.ref() console.log("2 =>", Timeout.unref()); clearTimeout(Timeout); console.log("3 => Printing after clearing Timeout"); Output:Scheduling Made SimplerIn this tutorial, you learned how to schedule tasks with the Node.js timer module. You've seen how to set timeouts, interval timers for recurring tasks, and how to use set immediate to bypass long operations. You've also seen how to stop these operations using the clear() method for each method.As with learning anything new, practising what you learn will make a big difference to how easily you can perform these tasks. Share your thoughts and questions in the comments as you try out what you’ve learnt.
2239
How to use Timers in Node.js

You can use Node.js's utilities to schedule the ex... Read More