foreach自动闭包

var http = require("http");

function request(url) {
  var options = {
		hostname: url,
		port: 80,
		path: '/',
		method: 'GET'
	};
	var req = http.request(options, function(res) {
		console.log('STATUS: ' + res.statusCode);
		console.log('HEADERS: ' + JSON.stringify(res.headers));
	});
	req.on('error', function(e) {
		console.log(e + url);
	});
	req.end();
}
["www.qq.com", "www.163.com", "www.sina.com", "www.sohu.com"].forEach(request);