JavaScript 将对象转换为字符串的自定义函数实现

 
function obj2str(o) {
var r = [];
if (typeof o == "string") return "\"" + o.replace(/([\'\"\\])/g, "\\$1").replace(/(\n)/g, "\\n").replace(/(\r)/g, "\\r").replace(/(\t)/g, "\\t") + "\"";
if (typeof o == "object") {
if (!o.sort) {
for (var i in o)
r.push(i + ":" + obj2str(o[i]));
if (!!document.all && !/^\n?function\s*toString\(\)\s*\{\n?\s*\[native code\]\n?\s*\}\n?\s*$/.test(o.toString)) {
r.push("toString:" + o.toString.toString());
} 
r = "{" + r.join() + "}"
} else {
for (var i = 0; i < o.length; i++)
r.push(obj2str(o[i]))
r = "[" + r.join() + "]"
} 
return r;
} 
return o.toString();
}