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Modules in Node.js

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Node.js modules are set of functions that are used to include in your application.It is very similar to the libraries in javascript. When involving in development, we can either use built in modules or else we can create our own modules. Usually Modules are not designed in the same file that we are developing in. Modules are created and stored in separate files for the easy use. So lets create a separate file to create a module.I have created a file called module.js for further proceedings Now I am going to create a basic module to count the number of elements in an  array in my new file. var value =function(array){   return array.length + ' elements are there'; }; console.log(value(['A','B','C','D'])); Now run the command line and check the output Now we have created our module in an separate file.Now we should make this function available outside the module.js file.For that type the following code in module.js file. modu...
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Working with ExpressJS Framework

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Express.js or Express is an web application framework built for Node.js which works as a Free and Open Source Software (FOSS).It is specially designed for building web Applications and API's.It includes a lot of plugins,support and documentation which aids in developement. This article will help you to get a fresh start to work with Express.js.To start we should install Express in our working project. Go to your working project and open command line init. Then type the following code. npm install express --save Here we have used --save in the command to show the dependency installed in package.json file which shows all the packages that have installed in your project. After you have successfully installed express you can see a folder named node modules in your project where you can see the express folder . To check whether its working I have written a small code. var express =require('express'); var app =express(); //firing the function cons...
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Read and Write files in Node.js

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Hey all...! This article will help you to know how to read and write files in Node.js. For this first of all we will create a small text file called hello.txt in our project folder and add a text in to it. For reading and writing modules we want to load one of the core modules which is known as fs in node modules. Lets require it in our working file as we did in previous articles. var fs = require('fs'); Then you have to read the file by using the following code. var readme=fs.readFileSync('hello.txt','utf8'); //blocking the code until we completing reading the filename console.log(readme); In the above code readFileSync is the method that we use to read a file.As you can see inside the parameters I have written the file name and utf8. as the file is read in binary that means using 1s and 0s to convert it we  use utf8. When you run the command line, you can read the hello.txt file. To avoid blocking the code below the reading code we can c...
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