大约有 47,000 项符合查询结果(耗时:0.0410秒) [XML]

https://stackoverflow.com/ques... 

How to dynamically load a Python class

...hing like this won't work: __import__('foo.bar.baz.qux') You'd have to call the above function like so: my_import('foo.bar.baz.qux') Or in the case of your example: klass = my_import('my_package.my_module.my_class') some_object = klass() EDIT: I was a bit off on this. What you're basicall...
https://stackoverflow.com/ques... 

Is it possible to create static classes in PHP (like in C#)?

... You can have static classes in PHP but they don't call the constructor automatically (if you try and call self::__construct() you'll get an error). Therefore you'd have to create an initialize() function and call it in each method: <?php class Hello { private static...
https://stackoverflow.com/ques... 

multiprocessing.Pool: When to use apply, apply_async or map?

... Back in the old days of Python, to call a function with arbitrary arguments, you would use apply: apply(f,args,kwargs) apply still exists in Python2.7 though not in Python3, and is generally not used anymore. Nowadays, f(*args,**kwargs) is preferred. The...
https://stackoverflow.com/ques... 

What is the 'new' keyword in JavaScript?

...n's external, accessible, prototype object (every function object automatically has a prototype property). It makes the this variable point to the newly created object. It executes the constructor function, using the newly created object whenever this is mentioned. It returns the newly created objec...
https://stackoverflow.com/ques... 

Using AES encryption in C#

...aged.aspx And just in case you need the sample in a hurry, here it is in all its plagiarized glory: using System; using System.IO; using System.Security.Cryptography; namespace RijndaelManaged_Example { class RijndaelExample { public static void Main() { try ...
https://stackoverflow.com/ques... 

Example for boost shared_mutex (multiple reads/one write)?

I have a multithreaded app that has to read some data often, and occasionally that data is updated. Right now a mutex keeps access to that data safe, but it's expensive because I would like multiple threads to be able to read simultaneously, and only lock them out when an update is needed (the updat...
https://stackoverflow.com/ques... 

Algorithm to detect corners of paper sheet in photo

...n are awesome, move to them as soon as possible. :D Instead of removing small objects and or noise, lower the canny restraints, so it accepts more edges, and then find the largest closed contour (in OpenCV use findcontour() with some simple parameters, I think I used CV_RETR_LIST). might still stru...
https://stackoverflow.com/ques... 

How to check if one DateTime is greater than the other in C#

...swered Sep 18 '08 at 19:17 Jon GallowayJon Galloway 49k2424 gold badges118118 silver badges191191 bronze badges ...
https://stackoverflow.com/ques... 

What does “mro()” do?

...very attribute you get on a class's instance, not just methods, is conceptually looked up along the __mro__, so, if more than one class among the ancestors defines that name, this tells you where the attribute will be found -- in the first class in the __mro__ that defines that name. ...
https://stackoverflow.com/ques... 

How to write very long string that conforms with PEP8 and prevent E501

... Implicit concatenation might be the cleanest solution: s = "this is my really, really, really, really, really, really," \ " really long string that I'd like to shorten." Edit On reflection I agree that Todd's suggestion to use brackets rather than line continuation is better for all the reas...