Mongodb - Delete all database that starts with a specific string.

gistfile1.txt

var dbs = db.getMongo().getDBNames()
for(var i in dbs){
    db = db.getMongo().getDB( dbs[i] );
    if (db.getName().startsWith('blah')) 
    {
        print( "dropping db " + db.getName() );  
        db.dropDatabase();
    }
}