大约有 42,000 项符合查询结果（耗时：0.0619秒） [XML]
List comprehension vs map
Is there a reason to prefer using map() over list comprehension or vice versa? Is either of them generally more efficient or considered generally more pythonic than the other?
...
How do I check (at runtime) if one class is a subclass of another?
Let's say that I have a class Suit and four subclasses of suit: Heart, Spade, Diamond, Club.
9 Answers
...
How to len(generator()) [duplicate]
Python generators are very useful. They have advantages over functions that return lists. However, you could len(list_returning_function()) . Is there a way to len(generator_function()) ?
...
How to append a newline to StringBuilder
I have a StringBuilder object,
9 Answers
9
...
JOIN queries vs multiple queries
Are JOIN queries faster than several queries? (You run your main query, and then you run many other SELECTs based on the results from your main query)
...
How to install mongoDB on windows?
I am trying to test out mongoDB and see if it is anything for me. I downloaded the 32bit windows version, but have no idea on how to continue from now on.
...
What's the best way to distribute Java applications? [closed]
Java is one of my programming languages of choice. I always run into the problem though of distributing my application to end-users.
...
C++ auto keyword. Why is it magic?
From all the material I used to learn C++, auto has always been a weird storage duration specifier that didn't serve any purpose. But just recently, I encountered code that used it as a type name in and of itself. Out of curiosity I tried it, and it assumes the type of whatever I happen to assig...
How do I remove background-image in css?
I have a general rule which gives all DIVs a background image.
I have one div (with id='a') which I don't want it to have the background image.
What css rule do I have to give it?
...
How to set conditional breakpoints in Visual Studio?
Is there an easy way to set conditional breakpoints in Visual Studio?
13 Answers
13
...