BasicDBObject or QueryBuilder and some newbie questions of Java and mongo
- by Kevin Xu
hi I'm a fresh newbie to mongodb
Q1
using
query=new BasicDBObject();
query.put("i", new BasicDBObject("$gt",13));
and
query=new QueryBuilder().put("i").Greaterthan(13).get()
is there any difference inside of the system?
Q2
I've created a class
class findkv extends BasicDBObject{
//is gt gte lt lte
public findkv(String fieldname,String op,Object tvalue)
{
if (op=="")
this.put(fieldname,tvalue);
else
this.put(fieldname, new BasicDBObject(op,tvalue));
}
}
shall I use it or shall I just use original function?
Q3
I've used mongo shell for a few weeks, and was customed to it, and find writing in mongo shell faster and shorter, which side has more advantage, writing in mongo or in java?
I shall dump them from mongo to mysql
Q4
I've an if (statement==true) return else dowhat; seems can't be compiled
I know I can write if (statement!=true) dowhat else return, but can I still write in first style?
q5
my eclipse is
Eclipse Java EE IDE for Web Developers.
Version: Juno Release
Build id: 20120614-1722
I'd like to install Perl which I haven't learned yet
I choose Install Update http://e-p-i-c.sf.net/updates/testing but it doesn't work, any method to install perl to eclipse manually?
