zhuzhuaicoding

// Use === and !==

// It is often better to use the === and !== operators  
// rather than == and != operators. The reason for this
// is that === and !== (also known as the identity operators)
// check for the type as well as the value when being compared
// whereas the == and != will try to coerce the two values
// into the same type before the comparison is made, which
// may lead to some very unexpected results.

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// Prevent Default Behavior

// 'return false' stops the default behavior of the event 
// and prevents it from bubbling up DOM, which kills 
// event delegation and may not be what you indented.
// You might consider using e.preventDefault() or 
// e.stopPropagation() instead 

//event.preventDefault()
//Event Delegation Friendly 

zhuzhuaicoding

/* jQuery Tiny Pub/Sub - v0.7 - 10/27/2011
 * http://benalman.com/
 * Copyright (c) 2011 "Cowboy" Ben Alman; Licensed MIT, GPL */

(function($) {

  var o = $({});

  $.subscribe = function() {
    o.on.apply(o, arguments);

zhuzhuaicoding

HI Trevor Burnham:

I'm a reader of your Async JavaScript book, I bought it on 23rd March and finished it on 26rd March, it is really a treasure to me, probably the best book about async programming in JavaScript I have ever read.

After finished this book, I found there are a few problems, as well as a set of my questions, exists, so I wrote this mail to you, expecting you could give a brief look.

Since I'm not a native English speaker, my English is really poor, so if there is any ambiguousness, please feedback to me so I could have a change to state it more clearly.

Fist of all, I would like to list 9 problems I found in this book, most of which are produced by the difference between our perspectives, so feel free is you don't think they are problems.

zhuzhuaicoding

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
                    Version 2, December 2004

 Copyright (C) 2011 Jed Schmidt <http://jed.is>

 Everyone is permitted to copy and distribute verbatim or modified
 copies of this license document, and changing it is allowed as long
 as the name is changed.

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE

zhuzhuaicoding

//1.with greedy match and global flag
var re = /\s*/g;
for (var i = 0; i < 6; i++) {
    console.log(re.exec('    as  '));
    console.log(re.lastIndex);//4,4,4,4,4,4
}

//2.without greedy match ,but global flag
var re1 = /\s/g;
for (var i = 0; i < 6; i++) {

zhuzhuaicoding

 var what_the_arguments_refer_to = function(fn) {
 		return function() {  // arguments -> this function
 			//debugger;
 			var args = Array.prototype.slice.call(arguments);
 			return fn.apply(null, [1].concat(args));
 		};
 	};
 var console_log_closures = function(a, b, c) {
 		return console.log(a, b, c);
 	}

zhuzhuaicoding

function getCss(elem, css){
	if (window.getComputedStyle) {
		return window.getComputedStyle(elem, null)[css];
	}else if (elem.currentStyle) {
		return elem.currentStyle[css];
	}else {
		return elem.style[css];
	}
}
function getWH(dom){

zhuzhuaicoding

function getCss(elem, css){
	if (window.getComputedStyle) {
		return window.getComputedStyle(elem, null)[css];
	}else if (elem.currentStyle) {
		return elem.currentStyle[css];
	}else {
		return elem.style[css];
	}
}

zhuzhuaicoding

var iframe;
try {
    iframe = document.createElement('<iframe name="test">'); // for ie
} catch (ex) {
    iframe = document.createElement('iframe');//for standard browser
} 
iframe.name = 'test';