大约有 48,000 项符合查询结果（耗时：0.0665秒） [XML]
Retrieve only the queried element in an object array in MongoDB collection
...
this query only return the array "shapes" and it won't return other fields. Anyone knows how to return other fields also?
– Mark Thien
Jul 29 '16 at 0:24
...
How to customize user profile when using django-allauth
...rst/last name as in the example above, then you do not need an extra model and can place things directly into the User model. If you would ask for the user's birthdate, his favorite color or whatever, then you need to setup your own profile model for this. Please have a look here on how to do this: ...
how do you push only some of your local git commits?
...
Assuming your commits are on the master branch and you want to push them to the remote master branch:
$ git push origin master~3:master
If you were using git-svn:
$ git svn dcommit master~3
In the case of git-svn, you could also use HEAD~3, since it is expecting a c...
Java project in Eclipse: The type java.lang.Object cannot be resolved. It is indirectly referenced f
...
This is an annoying Eclipse Bug which seems to bite now and then. See http://dev-answers.blogspot.de/2009/06/eclipse-build-errors-javalangobject.html for a possible solution, otherwise try the following;
Close the project and reopen it.
Clean the project (It will rebuild the bui...
Shorter syntax for casting from a List to a List?
...ible because it would require co/contravariance of the List<T> type, and that just can't be guaranteed in every case. Please read on to see the solutions to this casting problem.
While it seems normal to be able to write code like this:
List<Animal> animals = (List<Animal>) mamma...
Storing SHA1 hash values in MySQL
...d just waste an additional byte for the length of the fixed-length field.
And I also wouldn’t store the value the SHA1 is returning. Because it uses just 4 bit per character and thus would need 160/4 = 40 characters. But if you use 8 bit per character, you would only need a 160/8 = 20 character l...
Is there a limit on how much JSON can hold?
I am using jquery, JSON, and AJAX for a comment system. I am curious, is there a size limit on what you can send through/store with JSON? Like if a user types a large amount and I send it through JSON is there some sort of maximum limit?
...
How to get a list of installed android applications and pick one to run
...sked a similar question to this earlier this week but I'm still not understanding how to get a list of all installed applications and then pick one to run.
...
How to take screenshot with Selenium WebDriver
...er than renaming it, is a good idea if there is any chance that the source and destination might not be on the same filesystem. You can't rename across filesystem boundaries (on unix, at least). Note that it's common for /tmp to be on its own filesystem, and FirefoxDriver writes screenshots to /tmp....
How do I check if a variable exists in a list in BASH
...amp; echo 'yes' || echo 'no'. it's correct assuming space is the separator and $x doesn't contain space
– Tianren Liu
Apr 5 '16 at 21:47
...