大约有 43,000 项符合查询结果（耗时：0.0593秒） [XML]
Why does += behave unexpectedly on lists?
...
The general answer is that += tries to call the __iadd__ special method, and if that isn't available it tries to use __add__ instead. So the issue is with the difference between these special methods.
The __iadd__ special method is for an in-place addition, that is it mutates the object that it a...
What is the difference between Θ(n) and O(n)?
...I see Θ(n) with the strange Θ symbol with something in the middle of it, and sometimes just O(n). Is it just laziness of typing because nobody knows how to type this symbol, or does it mean something different?
...
What is a sensible way to layout a Go project [closed]
I have a go project that is starting to become more complex, and want to lay the filesystem out in such a way to reduce pain.
...
Should I use != or for not equal in T-SQL?
I have seen SQL that uses both != and <> for not equal . What is the preferred syntax and why?
14 Answers
...
Is functional GUI programming possible? [closed]
I've recently caught the FP bug (trying to learn Haskell), and I've been really impressed with what I've seen so far (first-class functions, lazy evaluation, and all the other goodies). I'm no expert yet, but I've already begun to find it easier to reason "functionally" than imperatively for basic ...
In Python, when should I use a function instead of a method?
...nt "can't kill it."
Moving away from this analogy, why do we use methods and classes? Because we want to contain data and hopefully structure our code in a manner such that it will be reusable and extensible in the future. This brings us to the notion of encapsulation which is so dear to OO design...
Is it possible to decrypt MD5 hashes?
...hat there are 2128 possible MD5 hashes. That is a reasonably large number, and yet it is most definitely finite. And yet, there are an infinite number of possible inputs to a given hash function (and most of them contain more than 128 bits, or a measly 16 bytes). So there are actually an infinite nu...
What are the differences between “=” and “
What are the differences between the assignment operators = and <- in R?
7 Answers
...
What is the difference between a Docker image and a container?
...en using Docker, we start with a base image. We boot it up, create changes and those changes are saved in layers forming another image.
...
Why does 2 mod 4 = 2?
...ion. My term does not start for two more weeks so I can't ask a professor, and the suspense would kill me.
19 Answers
...