打印js对象

输出JavaScript对象的内部结构常常做调试用.

一个输出所有对象属性的例子如下：
Javascript代码
function dump_obj(myObject) {
var s = "";
for (var property in myObject) {
s = s + "\n "+property +": " + myObject[property] ;
}
alert(s);
}


以上代码有些简陋，看个完善些的
Javascript代码
<script language="javascript">
var MAX_DUMP_DEPTH = 10;
function dumpObj(obj, name, indent, depth) {
if (depth > MAX_DUMP_DEPTH) {
return indent + name + ": <Maximum Depth Reached>\n";
}
if (typeof obj == "object") {
var child = null;
var output = indent + name + "\n";
indent += "\t";
for (var item in obj) {
try {
child = obj[item];
} catch (e) {
child = "<Unable to Evaluate>";
}
if (typeof child == "object") {
output += dumpObj(child, item, indent, depth + 1);
} else {
output += indent + item + ": " + child + "\n";
}
}
return output;
} else {
return obj;
}
}
</script>


/**
* 对象转json
* @param {Object} obj
*/
this.obj2Str=function(o){

if (o == undefined) {
return "";
}
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 + "\":" + this.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(this.obj2Str(o[i]))
r = "[" + r.join() + "]";
}
return r;
}
return o.toString().replace(/\"\:/g, '":""');
}


/**
* 打印js的对象
* obj 对象
* name 名称
* indent 缩减
* depth 深度
*/
this.dumpObj=function(obj, name, indent, depth) {
var MAX_DUMP_DEPTH = 3;
if (depth > MAX_DUMP_DEPTH) {
return indent + name + ": <Maximum Depth Reached>\n";
}
if (typeof obj == "object") {
var child = null;
var output = indent + name + "\n";
indent += "\t";
for (var item in obj) {
try {
child = obj[item];
} catch (e) {
child = "<Unable to Evaluate>";
}
if (typeof child == "object") {
output += this.dumpObj(child, item, indent, depth + 1);
} else {
output += indent + item + ": " + child + "\n";
}
}
return output;
} else {
return obj;
}
}