大约有 13,071 项符合查询结果（耗时：0.0268秒） [XML]
MongoDB: update every document on one field
...
Regardless of the version, for your example, the <update> is:
{ $set: { lastLookedAt: Date.now() / 1000 } }
However, depending on your version of MongoDB, the query will look different. Regardless of version, the key is that the empty condition {}...
How to convert list of tuples to multiple lists?
Suppose I have a list of tuples and I want to convert to multiple lists.
7 Answers
7
...
How do I get the MAX row with a GROUP BY in LINQ query?
I am looking for a way in LINQ to match the follow SQL Query.
6 Answers
6
...
How to get the original value of an attribute in Rails
is there a way to get the original value that an ActiveRecord attribute (=the value that was loaded from the database)?
4 A...
Can a dictionary be passed to django models on create?
...
If title and body are fields in your model, then you can deliver the keyword arguments in your dictionary using the ** operator.
Assuming your model is called MyModel:
# create instance of model
m = MyModel(**data_dict)
# don't forget to save to database!
m...
Warning the user/local/mysql/data directory is not owned by the mysql user
...
If you can't start mysql service in snow leopard, and in the panel prefs appears 'warning the user/local/mysql/data directory is not owned by the mysql user', you have to:
sudo chown -RL root:mysql /usr/local/mysql
sudo chown -R...
How I can delete in VIM all text from current line to end of file?
...of the file. Is it possible (in vim) to delete the rest of the file (from current line to the end of file)?
4 Answers
...
What does an underscore in front of an import statement mean?
I saw this example from sqlite3 on GitHub :
4 Answers
4
...
How can I add a boolean value to a NSDictionary?
Well, for integers I would use NSNumber . But YES and NO aren't objects, I guess. A.f.a.i.k. I can only add objects to an NSDictionary , right?
...
What is the “reactor” in Maven?
I've been reading about Maven reactor and am confused by its terminology usage. I've read that a multi-module is a reactor, that you can manipulate the maven reactor and that the reactor is a plugin. What exactly is the reactor?
...