Node.js学习 - Function

function say(word) {
console.log(word);
}

function execute(someFunction, value) {
someFunction(value);
}

execute(say, "Hello");

function execute(someFunction, value) {
someFunction(value);
}

execute(function(word){ console.log(word) }, "Hello");

var http = require("http");

http.createServer(function(request, response) {
response.writeHead(200, {"Content-Type": "text/plain"});
response.write("Hello World");
response.end();
}).listen(8888);

也可以这样：
var http = require("http");

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

http.createServer(onRequest).listen(8888);