test node.js


console.log('Hello World');

Read file

// Load the fs (filesystem) module.
var fs = require('fs');// 

// Read the contents of the file into memory.
fs.readFile('example_log.txt', function (err, logData) {
// If an error occurred, throwing it will
 // display the exception and kill our app.
 if (err) throw err;
// logData is a Buffer, convert to string.
 var text = logData.toString();
var results = {};

// Break up the file into lines.
 var lines = text.split('\n');
lines.forEach(function(line) {
 var parts = line.split(' ');
 var letter = parts[1];
 var count = parseInt(parts[2]);
if(!results[letter]) {
 results[letter] = 0;
results[letter] += parseInt(count);
 // { A: 2, B: 14, C: 6 }

HTTP Server

var http = require("http");

function onRequest(request, response) {
 response.writeHead(200, {"Content-Type": "text/plain"});
 response.write("Hello World");


ref : http://blog.modulus.io/absolute-beginners-guide-to-nodejs


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