chemdemo

var parseHtmlTarg  = (function(){
    //解析页面html字符串
    var _RegExp = /<(\/)*([a-zA-Z]+)([^>\w]+[^>]*)*>/ig;
    var _attrRegExp = /[^>\w]+([a-zA-Z]+)=[\"\']?([^\"\']*)[\"\']?/ig;
    var cssRegExp = /(expression)+/ig
    var URL_EXP = new RegExp("((news|telnet|nttp|file|http|ftp|https)://)(([-A-Za-z0-9]+(\\.[-A-Za-z0-9]+)*(\\.[-A-Za-z]{2,5}))|([0-9]{1,3}(\\.[0-9]{1,3}){3}))(:[0-9]*)?(/[-A-Za-z0-9_\\$\\.\\+\\!\\*\\(\\),;:@&=\\?/~\\#\\%]*)*", "g");
    //var IMG_EXP = /([^'"]+)[^>]*/ig
    var filtterTags = {
        'script' : true,
        'iframe' : true,

chemdemo

// `this` in javascript functions points to the object called it!!

function f() {
    undefined !== this.x ? this.x ++ : (this.x = 1);
}

var o = {
    f: f
};

chemdemo

var http = require('http');
var fs = require('fs');
var cp = require('child_process');
var getSocketPath = function(cpu) {
    return __dirname + '/' + cpu + '.sock';
};
var cpu = 0;

// node process was bound to the first cpu in this demo.
var socketPath = getSocketPath(cpu);

chemdemo

/** 
example:
function async(n, callback) {
    setTimeout(function() {
        callback(n);
    }, n);
}

queue([100, 200], async, function(err, r) {console.log(r);}); // => [100, 200]
**/

chemdemo

var dispatcher = function() {
    var pools = {};
    // {
    //     'foo': [fn1, fn2],
    //     'bar': [fn3, fn4]
    // }

    return {
        on: function(action, handle) {
            var actions = pools[action] || (pools[action] = []);

chemdemo

var s = '$0abc\\$1 $2 $3[$2]gr $4[x][1]'; // => $0, $2, $3[$2], $4[x][1]

s.replace(/((?!\\)\$\d+(\[[^\[\]]+\])*)/g, function(m, $1, $2, index) {
    console.log(m, $1, $2, index);
});

chemdemo

// see => http://jsperf.com/postmessage
var echoSetTimeout = (function() {
    return function(msg, cb) {
      setTimeout(cb, 0);
    }
  })();
  
  var echoWorker = (function() {
    var code = 'onmessage = function(e) { postMessage(e.data) };';
    var blobBuilder = window.BlobBuilder || window.WebKitBlobBuilder || window.MozBlobBuilder;

chemdemo

//比如在下列A、B、C、D三处转义方式均有细节差异。

//<a href="http://www.qq.com" title="<?=$A?>"><?=$B?></a>
//<script>var name="<?=$C?>"</script>
//<textarea>
//<?=$D?>
//</textarea>

//进行pre的只能是D，而且还要做其他转义，比如 < 转为 &lt;

chemdemo

• 求值：

var n1 = 10;
var n2 = 5;
var r = n1+++n2;
console.log(n1, n2, r); // => 11, 5, 15

• 求值：

chemdemo

var Promise = function () {
    this.thens = [];
};

Promise.prototype = {
    resolve: function () {
        var t = this.thens.shift(), n;
        t && (n = t.apply(null, arguments), n instanceof Promise && (n.thens = this.thens));
    },
    then: function (n) {