大约有 47,000 项符合查询结果(耗时:0.0503秒) [XML]

https://stackoverflow.com/ques... 

What is the most pythonic way to check if an object is a number?

...vector or a number is comparing apples to oranges - I can have a vector of strings or numbers, and I can have a single string or single number. You are interested in how many you have (1 or more), not what type you actually have. my solution for this problem is to check whether the input is a singl...
https://stackoverflow.com/ques... 

What is the difference between Reader and InputStream?

... makes your easier to internationalize and maintain. Note: This is just an extra information for exploring Java I/O codes is that, the design pattern of Java I/O implementation follows decorator design pattern. If you familiar with decorator design pattern then you can easily catchup the implementat...
https://stackoverflow.com/ques... 

Is it possible to print a variable's type in standard C++?

...havior. What I'm recommending below is: template <typename T> std::string type_name(); which would be used like this: const int ci = 0; std::cout << type_name<decltype(ci)>() << '\n'; and for me outputs: int const <disclaimer> I have not tested this on MSVC. &...
https://stackoverflow.com/ques... 

Cleaner way to update nested structures

...nt = 3, superMode: Boolean = false) scala> @zip case class Game(state: String = "pause", pacman: Pacman = Pacman()) scala> val g = Game() g: Game = Game("pause",Pacman(3,false)) // Changing the game state to "run" is simple using the copy method: scala> val g1 = g.copy(state = "run") g...
https://stackoverflow.com/ques... 

Error when changing to master branch: my local changes would be overwritten by checkout

... Your options, as I see it, are - commit, and then amend this commit with extra changes (you can modify commits in git, as long as they're not pushed); or - use stash: git stash save your-file-name git checkout master # do whatever you had to do with master git checkout staging git stash pop git...
https://stackoverflow.com/ques... 

Python __str__ versus __unicode__

...ck with them for compatibility reasons. Generally, you should put all your string formatting in __unicode__(), and create a stub __str__() method: def __str__(self): return unicode(self).encode('utf-8') In 3.0, str contains characters, so the same methods are named __bytes__() and __str__(). ...
https://stackoverflow.com/ques... 

How can I get all the request headers in Django?

...rip will strip out all leading characters that match any characters in the string you give it, so if you have a header "HTTP_TOKEN_ID" it will give back "OKEN_ID", because the "T" at the beginning of "TOKEN" matches a character in the string passed to lstrip. The way to do it is prefix = 'HTTP_'; h...
https://stackoverflow.com/ques... 

Can someone explain Microsoft Unity?

...f Dependency Injection in ASP.NET Web API 2 public interface IShape { string Name { get; set; } } public class NoShape : IShape { public string Name { get; set; } = "I have No Shape"; } public class Circle : IShape { public string Name { get; set; } = "Circle"; } public class Rectang...
https://stackoverflow.com/ques... 

Converting strings to floats in a DataFrame

How to covert a DataFrame column containing strings and NaN values to floats. And there is another column whose values are strings and floats; how to convert this entire column to floats. ...
https://stackoverflow.com/ques... 

Learning Regular Expressions [closed]

...ou've ever used grep on Unix—even if only to search for ordinary looking strings—you've already been using regular expressions! (The re in grep refers to regular expressions.) Order from the menu Adding just a little complexity, you can match either 'Nick' or 'nick' with the pattern [Nn]ick. T...