William Zhou z2015

eeAiiZooAuuZZeeeZZfff

A[^Z]*ZZ yields 1 match: AuuZZ
A.*?ZZ yields 1 match: AiiZooAuuZZ
A.*ZZ yields 1 match: AiiZooAuuZZeeeZZ

source: http://stackoverflow.com/questions/3075130/difference-between-and-for-regex

#Cache-Control适用场合该参数用于缓存控制，在设置了该值后，浏览器会在超过该时间的情况下强行请求一次服务器，否则会一直使用上一次访问时的数据。例如max-age=60，这里就告诉了浏览器在60秒内可以使用缓存，超过后需要重新向服务器发送请求。这里要注意的事文件的访问方式局限于该文件是被其它文件所调用，或者是在新窗口访问该文件，如果在访问单个文件时使用了浏览器上的刷新按钮，那么就会浏览器就会强行触发一次发向服务器的请求。这也就为什么很多人发现Cache-Control设置失效的原因。

#ETag的作用该值一般是由服务器端生成的一段随机代码，用于指示当前访问文件的特殊值（文件的任何改变都会导致其改变）。一般用于校验当前文件是否是最新的文件。

#Cache-Control结合ETag的用法

	function strIndexOf(val, str) {
	val = String(val);
	var strLen = str.length;
	if (strLen >= val.length) {
	var head = val[0]
	var hasHead = -1;
	var matchLen = 0;

	for (var i = 0; i < strLen; i++) {
	var v = str[i];

-function remove(str){
-  var sCR = /(\/\/(.*)$)/gm;
-  var bCR = /(\/\*([\s\S]*?)\*\/)/gm;
-  bst eR = /^\s*[\r\n]/gm;
-  return str.replace(sCR, '')
-            .replace(bCR, '')
-            .replace(eR, '');
-}

	<!doctype html>
	<html>
	<head>
	<title>iFrame memory leak prevention test</title>
	</head>
	<body>
	<h1>iFrame memory leak prevention test (void)</h1>

	<p>In IE up through version 8 adding an iframe to a page and
	removing it produces a memory leak in some cases. The pattern

	$.fn.serializeObject = function() {
	var o = {};
	var a = this.serializeArray();
	$.each(a, function() {
	if (o[this.name]) {
	if (!o[this.name].push) {
	o[this.name] = [o[this.name]];
	}
	o[this.name].push(this.value \|\| '');
	} else {

	server {
	listen 80;

	server_name wx.example.com;

	location / {
	proxy_pass http://localhost:1336;
	proxy_http_version 1.1;
	proxy_set_header Upgrade $http_upgrade;
	proxy_set_header Connection 'upgrade';

	$(window).on('unload', function() {
	$(window).scrollTop(0);
	});

	window.onunload = function(){ window.scrollTo(0,0); }

	if ('scrollRestoration' in history) {
	history.scrollRestoration = 'manual';
	}

	var status = '.status-0'
	console.log(status.substr(2,2)); //first param by begin, second by cut length, got 'ta'
	console.log($(this).attr('data-filter').substring(2,4)); // first param by begin index, second by sub index string. got 'ta' also .

	var values = [
	{ name: 'someName1' },
	{ name: 'someName2' },
	{ name: 'someName4' },
	{ name: 'someName2' }
	];

	var valueArr = values.map(function(item){ return item.name });
	var isDuplicate = valueArr.some(function(item, idx){
	return valueArr.indexOf(item) != -1;