大约有 31,840 项符合查询结果（耗时：0.0495秒） [XML]
How to return an empty ActiveRecord relation?
...
There is a now a "correct" mechanism in Rails 4:
>> Model.none
=> #<ActiveRecord::Relation []>
share
|
improve this answer
|
follow
...
What’s the difference between ScalaTest and Scala Specs unit test frameworks?
...ppy users, but they differ in several ways. You will probably want to pick one as your main testing tool in Scala, but need not give up the other because you can use pieces of both. If you like ScalaTest's FeatureSpec syntax and specs' Mockito syntax, for example, you can put both jar files in your ...
What good technology podcasts are out there?
...t
Ajaxian Podcast
Pragmatic Podcasts
Channel 9 Audio Feed
EDIT: Missed one:
Elegant Code Cast
share
edited Aug 14 '08 at 12:17
...
SQL keys, MUL vs PRI vs UNI
...mitted within the column.
There is also a final caveat:
If more than one of the Key values applies to a given column of a table, Key displays the one with the highest priority, in the order PRI, UNI, MUL.
As a general note, the MySQL documentation is quite good. When in doubt, check it out!
...
What is a mutex?
...er chicken, you need to ask yourself whether you actually need 5 people in one room and would it not just be easier with one person in the room on their own doing all the work. Actually, this is just extending the analogy, but you get the idea.
...
How do I push amended commit to the remote Git repository?
...e the author (gitster) of this answer seems to not exist anymore, could anyone help to clarify the item number 1: find the old commit. If you don't have a backup, where would you find it? Amend and force push wouldn't have it destroyed? Maybe he is referring to get it from a friend/collaborator that...
PHP $_SERVER['HTTP_HOST'] vs. $_SERVER['SERVER_NAME'], am I understanding the man pages correctly?
...
That’s probably everyone’s first thought. But it’s a little bit more difficult. See Chris Shiflett’s article SERVER_NAME Versus HTTP_HOST.
It seems that there is no silver bullet. Only when you force Apache to use the canonical name you wi...
What is the difference between aggregation, composition and dependency? [duplicate]
...
The Tires can be taken off of the Car object and installed on a different one. Also, if the car gets totaled, the tires do not necessarily have to be destroyed.
Composition
Body -> Blood Cell
When the Body object is destroyed the BloodCells get destroyed with it.
Dependency
A relationsh...
Run all SQL files in a directory
...ant the .SQL files to be executed, double click the .BAT file and you are done!
share
|
improve this answer
|
follow
|
...
Set selected item of spinner programmatically
...Adapter() seem to display the 1st item always (Android 2.3), even the good one is selected in the dropView. adding view.post() (@Marco Hernaiz Cao answer) fix it for me.
– Christ
Jun 20 '14 at 10:14
...