js解析map

解析map：

var obj = {

"a": 1,

"b": 2,

"c": 3

};

for (var prop in obj) {

if (obj.hasOwnProperty(prop)) {

// or if (Object.prototype.hasOwnProperty.call(obj,prop)) for safety...

alert("prop: " + prop + " value: " + obj[prop])

}

}

双重map解析：

var msg = "";

for(var key in Pin) {

for(var i in Pin[key]){

msg+=i+": "+Pin[key][i]+"\n";

}

}

alert(msg);