大约有 30,000 项符合查询结果(耗时:0.0661秒) [XML]

https://stackoverflow.com/ques... 

Do rails rake tasks provide access to ActiveRecord models?

I am trying to create a custom rake task, but it seems I dont have access to my models. I thought this was something implicitly included with rails task. ...
https://stackoverflow.com/ques... 

Using @property versus getters and setters

...de world. There are plenty of ways to do this in Python (getattr, setattr, __getattribute__, etc..., but a very concise and clean one is: def set_email(self, value): if '@' not in value: raise Exception("This doesn't look like an email address.") self._email = value def get_email(s...
https://stackoverflow.com/ques... 

What is “lifting” in Haskell?

I don't understand what "lifting" is. Should I first understand monads before understanding what a "lift" is? (I'm completely ignorant about monads, too :) Or can someone explain it to me with simple words? ...
https://stackoverflow.com/ques... 

Get String in YYYYMMDD format from JS date object?

I'm trying to use JS to turn a date object into a string in YYYYMMDD format. Is there an easier way than concatenating Date.getYear() , Date.getMonth() , and Date.getDay() ? ...
https://stackoverflow.com/ques... 

Filtering for empty or NULL names in a queryset

I have first_name , last_name & alias (optional) which I need to search for. So, I need a query to give me all the names that have an alias set. ...
https://stackoverflow.com/ques... 

res.sendFile absolute path

...res.sendFile. There are two simple ways to do it: res.sendFile(path.join(__dirname, '../public', 'index1.html')); res.sendFile('index1.html', { root: path.join(__dirname, '../public') }); Note: __dirname returns the directory that the currently executing script is in. In your case, it looks like...
https://stackoverflow.com/ques... 

What is an alternative to execfile in Python 3?

...me on Python3.3. I get "No such file or directory" when I exec(open('./some_file').read()). I have tried including the '.py' extension and also excluding the './' as well – JoeyC Feb 20 '14 at 0:20 ...
https://stackoverflow.com/ques... 

How do I use PHP namespaces with autoload?

...in the global scope. See below for a working example: <?php function __autoload($class) { $parts = explode('\\', $class); require end($parts) . '.php'; } use Person\Barnes\David as MyPerson; $class = new MyPerson\Class1(); Edit (2009-12-14): Just to clarify, my usage of "use ... a...
https://stackoverflow.com/ques... 

How do I check for a network connection?

...000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4.61182 48.1414 4.61182C47.4335 4.61182 46.7256 4.91628 46.0943 5.50789C45.7307 4.9328 4...
https://stackoverflow.com/ques... 

Can I concatenate multiple MySQL rows into one field?

... answered Apr 8 '10 at 11:32 pau.morenopau.moreno 3,58133 gold badges2929 silver badges3636 bronze badges ...