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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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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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The Global Object in Node.js

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In this article you will get to know about the Global Object in Node.js These Global Objects can be seen in modules that are their in Node.js. The Global object in Node can be considered as an object called Global.If youa are familiar with my previous articles on introduction, you may have already created our first command using Node (Click here  to get the article). Move on to the same file and open your command line. Before starting move on to the  Node.js Documentation  to get familiar with Global objects. Here you can see the documentation has given set of Global objects,Among them setInterval,setTimeout can be considered as window objects as well . lets try an example.Here I will write an function to setTimeout function setTimeout(function(){   console.log('You are after 5 seconds'); },5000); In this function you will get an timeout of  5 seconds which will be shown in the time out of 5000 milliseconds. When you run this in the term...
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