Short simple example of node async code

gistfile1.txt

var util = require('util'),
	path = require('path'),
	fs = require('fs');

var fileName = process.argv[2];
path.exists(fileName, function(exists) {
	if (!exists) {
		util.puts(fileName + ' not found');
		return;
	}
	
	util.puts('w00t! ' + fileName + ' exists!');
});