wintercn

        function get(uri) {
            return http(uri,'GET');
        }
        function post(uri,data) {
            if(typeof data === 'object' && !(data instanceof String || (FormData && data instanceof FormData))) {
                var params = [];
                for(var p in data) {
                    if(data[p] instanceof Array) {
                        for(var i = 0; i < data[p].length; i++) {
                            params.push( encodeURIComponenet(p) + '[]=' + encodeURIComponenet(data[p][i]);

sofish

var parser = function(url) {
  var a = document.createElement('a');
  a.href = url;
  
  var search = function(search) {
    if(!search) return {};
    
    var ret = {};
    search = search.slice(1).split('&');
    for(var i = 0, arr; i < search.length; i++) {

sofish

var obj = {
    hello: function() {
        console.log('sofish');
    },
    world: function(){
        console.log('lin');
    }
};

var fn = function(hello, ooxx, world){

wintercn

function getCommonParent(el1,el2){

    var parents1 = [];
    var el = el1;
    while(el) {
        parents1.unshift(el);
        el = el.parentNode;
    }

    var parents2 = [];

neekey

捕捉浏览器中的JS运行时错误，主要通过监听window.onerror来实现。但是对于不同的脚本执行方式以及不同的浏览器，能捕获到的信息会有区别。

window.onerror 讲接收3个参数：

• msg：错误描述，比如：a is not defined
• url：出错脚本所在的url
• lineNumber：出错脚本的行数

本文将对不同浏览器和不同的脚本执行方式进行测试，并总结这些区别。

paulirish

Learn JavaScript concepts with the Chrome DevTools

Authored by Peter Rybin , Chrome DevTools team

In this short guide we'll review some new Chrome DevTools features for "function scope" and "internal properties" by exploring some base JavaScript language concepts.

Closures

Let's start with closures – one of the most famous things in JS. A closure is a function, that uses variables from outside. See an example:

kejun

;(function($) {
    var MutationObserver = window.MutationObserver || window.WebKitMutationObserver || window.MozMutationObserver;

    function isDOMAttrModifiedSupported() {
        var p = document.createElement('p');
        var flag = false;

        if (p.addEventListener) p.addEventListener('DOMAttrModified', function() {
            flag = true
        }, false);

lifesinger

// ==ClosureCompiler==
// @compilation_level SIMPLE_OPTIMIZATIONS
// ==/ClosureCompiler==

function xx() {
function hello(name) {
  alert('Hello, ' + name);
}
eval('(hello("New user"))')

nzakas

• http://tutsplus.com/tutorial/writing-modular-javascript/
• https://github.com/aranm/scalable-javascript-architecture
• https://github.com/patrick99e99/scalable-js-architecture-app
• http://scaleapp.org/
• http://addyosmani.com/largescalejavascript/
• https://github.com/tcorral/Hydra.js/
• http://alanlindsay.me/kerneljs/
• http://terrifically.org/
• https://github.com/gorillatron/cerebral

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD