extjs源码分析-(Ext.urlDecode/urlEncode)

 //把json格式转化成url的编码方式
 // e.g. Ext.urlEncode({foo: 1, bar: 2}); would return "foo=1&bar=2"
 urlEncode: function(o, pre){//o为json对象,pre为前缀
             var undef, buf = [], key, e = encodeURIComponent;

             for(key in o){
                 undef = !Ext.isDefined(o[key]);
                 Ext.each(undef ? key : o[key], function(val, i){
                     buf.push("&", e(key), "=", (val != key || !undef) ? e(val) : "");
                 });
             }
             if(!pre){
                 buf.shift();
                 pre = "";
             }
             return pre + buf.join('');
         },
 //把URL字符串编码转化成json对象
 //Ext.urlDecode("foo=1&bar=2"); // returns {foo: "1", bar: "2"}
 //Ext.urlDecode("foo=1&bar=2&bar=3&bar=4", false); // returns {foo: "1", bar: ["2", "3", "4"]}

 urlDecode : function(string, overwrite){//string URL参数,overwrite针对同一参数的多个值是否覆盖,false为不覆盖,那就返回这个参数的数组
             var obj = {},
                 pairs = string.split('&'),
                 d = decodeURIComponent,
                 name,
                 value;
             Ext.each(pairs, function(pair) {
                 pair = pair.split('=');
                 name = d(pair[0]);
                 value = d(pair[1]);
                 obj[name] = overwrite || !obj[name] ? value :
                             [].concat(obj[name]).concat(value);
             });
             return obj;
         }

原文链接： http://lovebeyond.iteye.com/blog/949502