gistfile1.txt

// golang 1.5.1
// go run hello.go
package main                                                                                                                                        
 
import (                                                                                                                                                                                                                                                                                                
    "fmt"                                                                                                                                           
    "log"     
    
    "net/http"
)                                                                                                                                                   
 
func rootHandler(w http.ResponseWriter, r *http.Request) {                                                                                          
    fmt.Fprint(w, "Hello, world!")                                                                                                                  
}                                                                                                                                                   
 
func main() {                                                                                                                                       
    http.HandleFunc("/", rootHandler)                                                                                                               
    log.Fatal(http.ListenAndServe(":9090", nil))                                                                                                    
}   

// node 4.1.1
// node hello.js
var ip   = "127.0.0.1";
var port = 1337;
var http = require('http');

http.createServer(function (req, res) {
  res.writeHead(200, {'Content-Type': 'text/plain'});
  res.end('Hello World\n');
}).listen(port, ip);

// ruby 2.2.3, rack 1.6.4, passenger 5.0.20
// passenger start
run Proc.new { |env| ['200', {'Content-Type' => 'text/plain'}, ["Hello World\n"]] }