大约有 49,000 项符合查询结果（耗时：0.0673秒） [XML]
What is the difference between t.belongs_to and t.references in rails?
What is the difference between t.references and t.belongs_to ?
Why are we having those two different words? It seems to me they do the same thing?
Tried some Google search, but find no explanation.
...
django admin - add custom form fields that are not part of the model
... that based on these fields values I will build the long string expression and save it in the relevant model field.
5 Answe...
What is the Ruby (spaceship) operator?
...en return -1
if a = b then return 0
if a > b then return 1
if a and b are not comparable then return nil
It's useful for sorting an array.
share
|
improve this answer
|
...
How to copy a directory structure but only include certain files (using windows batch files)
... @Niels Brinch Yes, you should be able to do that. What is the exact command line you are using?
– aphoria
Sep 19 '12 at 23:53
1
...
http HEAD vs GET performance
...ter than retrieving the entire resource.
You could implement both options and benchmark them to see which is faster, but rather than micro-optimize, I would focus on designing the ideal REST interface. A clean REST API is usually more valuable in the long run than a kludgey API that may or may not ...
Is there a short contains function for lists?
...m not in list:
# do something
It's work fine for lists, tuples, sets and dicts (check keys).
Note that this is an O(n) operation in lists and tuples, but an O(1) operation in sets and dicts.
share
|
...
How to use Active Support core extensions
I have Active Support 3.0.3 installed and Rails 3.0.3 with Ruby 1.8.7.
5 Answers
5
...
What does JVM flag CMSClassUnloadingEnabled actually do?
...//blogs.oracle.com/poonam/about-g1-garbage-collector,-permanent-generation-and-metaspace Kudos go to mt.uulu
For Java 5-7:
The standard Oracle/Sun VM look on the world is: Classes are forever. So once loaded, they stay in memory even if no one cares anymore. This usually is no problem since you do...
Rake just one migration
...
rake db:migrate:redo VERSION=xxxxxxx, but that will run the down and then the up step. You could do this in conjunction with commenting out the down step temporarily.
share
|
improve this ...
Get an object's class name at runtime
...\w+/g)[1];
The above code gets the entire constructor code as a string and applies a regex to get all 'words'. The first word should be 'function' and the second word should be the name of the class.
Hope this helps.
sh...