mongodb將字段從字符串轉到日期類型

直接上代碼：

# x.Age="Aug-11-2019 12:02:42 AM"; 日期字符串
db.myTable.find({Age:{$type:2}}).forEach(function(x){
    var myregexp = /(...)-(..)-(....) (..):(..):(..) (..)/;
    if(myregexp.test(x.Age)){
            var matches = myregexp.exec(x.Age);
            h_str=matches[4];
            if (matches[7]=="AM" && h_str=="12"){
                var h_str="00";
            };
            if (matches[7]=="PM" && matches[4]!="12"){
                var h_str=12+NumberInt(h_str);
            };
        };
    var timeStr=matches[1]+" "+matches[2]+" "+matches[3]+" "+h_str+":"+matches[5]+":"+matches[6];
    x.Age=new Date(timeStr);
    db.myTable.save(x);
})

$type是mongodb的數據類型：

類型	對應數字	別名	說明
Double	1	double
String	2	string
Object	3	object
Array	4	array
Binary data	5	binData
Undefined	6	undefined	棄用
ObjectId	7	objectId
Boolean	8	“bool”
Date	9	“date”
Null	10	“null”
Regular Expression	11	“regex”
DBPointer	12	“dbPointer”
JavaScript	13	“javascript”
Symbol	14	“symbol”
JavaScript(with scope)	15	“javascriptWithScope”
32-bit integer	16	“int”
Timestamp	17	“timestamp”
64-bit integer	18	“long”
Min key	-1	“minKey”
Max key	127	“maxKey”