how to run node js file

Hey Friends!
How are you ? I think you all are fine if not then I pray to God for your good health and happy life.I got a lot of mail from readers about nodejs.

So I have decided to prepare couple of post to clear basic concepts of node.js and I have prepared few posts and I promised you that from these posts you can be able to clear your basic concepts.

Now, at first we set up our system so that it can be able to run node js file.

You are not launching rocket just running a node js file.
Don't worry because you are not launching rocket in which you have to consider a lot of parameters.Your problem is just to run  node js file.
Sharp your axe.
Once Abraham Lincoln had said "Give me six hours to chop down a tree and I will spend the first four sharpening the axe."
So before run node js file at first we have to prepare system so that it can be able to run node js file.
for this purpose  at first consider we have to consider about node js setup.

node js setup

To run node js file at first you have to download Node.js installable archive file from Node js Downloads and install it on your system after that run this command on your system to check that your system is comfortable for running node js file or not.

So, to check your system is comfortable for running node js file or not open your cmd and type

     node --version

If after running this command you got installed version of node js then your system is comfortable for run node js file.Now we create a small node js application for printing hello world on console then we move further.

create nodejs first  application

So for this purpose follow these steps
  • Open your editor like notepad,notepad++ or any text editor.
  • Create helloworld.js file
  • then write following code for printing hello world on console

    console.log('hello world .....');
run code:
for running node js file we have to follow these steps

  • open cmd
  • go to location where file helloworld.js is located using cd command (suppose my is stored on desktop then I will write cd Desktop and now my current directory will be Desktop)
  • After that type command with file name like

   node helloword.js

Output

    hello world .....


In next post we work on more examples and clear more concepts.

Comments

Post a Comment

Popular posts from this blog

Secure Database Connectivity in node.js with mysql

Image
Hi Everyone! Yesterday my friend Andrea from Italy asked me a question about secure Database connectivity in node.js with mysql i.e. he wants to a secure database connection in node.js for some secure keys like username,password,database name that we use during database connectivity.His problem is obviously right from security point of view as we know that JavaScript is client side scripting knowledge so it is compiled on client side so after inspecting page some one can be able to view these secure keys which I discussed previously. I surf internet and found there are various ways to solve this problem I am not discussing all of them here but also I discussing here two of them and after this discussion I think Andrea and other reader who are facing with same problem can be able to resolve their problem. I choose two ways to solve this problem. Connection code in app.js file Create a Json file Connection code in app.js file : Javascript is client side language and code i
Keep reading

Export data from mysql db to csv file using java

Image
Hi friends ! Today I am discussing about simple but very important scenario. When we create any application then during creation of application we have face many scenarios like 1.Taking information from user and storing these information inside database : Generally such type of Operation is performed by user using form application 2.Taking Data from Database and Displaying on Page : We can perform such type of Operation in various ways like using JSP,JSTL tags or you can perform such operations using JQUERY also. 3.Taking Data from Database and download it in Excel or CSV format : In this we want our data from database and store it inside Excel or text files for further use. And we have chosen third scenario from discussion for performing this Operation we have to need three files exportCsv.html  :- this contains a button for clicking and performing exporting data from database Operation ExportData.java  :- It is a servlet class which defines connectivity from databas
Keep reading

API (Application Programming Interface)

Image
Definition  1.A set of routines by which an application program can call specific programs or services of a computer operating system (OS) or network operating system (NOS). 2.A set of routines by which an application program allows another application program to work directly with it.            ( A pplication P rogramming I nterface) A language and message format used by an application program to communicate with the operating system or some other control program such as a database management system (DBMS) or communications protocol. APIs are implemented by writing function calls in the program, which provide the linkage to the required subroutine for execution. Thus, an API implies that a driver or program module is available in the computer to perform the operation or that software must be linked into the existing program to perform the tasks. Plenty of API Programming Is Done Understanding an API is a major part of what a programmer does. Except for
Keep reading