大约有 43,000 项符合查询结果（耗时：0.0647秒） [XML]
What is an optional value in Swift?
From Apple's documentation :
13 Answers
13
...
Why are quaternions used for rotations?
I'm a physicist, and have been learning some programming, and have come across a lot of people using quaternions for rotations instead of writing things in matrix/vector form.
...
What is the difference between a.getClass() and A.class in Java?
In Java what pros/cons exist surrounding the choice to use a.getClass() or A.class ? Either can be used wherever a Class<?> is expected, but I imagine that there would be performance or other subtle benefits to using both in different circumstances (just like there are with Class.forName...
REST API Best practices: Where to put parameters? [closed]
A REST API can have parameters in at least two ways:
14 Answers
14
...
Understanding generators in Python
I am reading the Python cookbook at the moment and am currently looking at generators. I'm finding it hard to get my head round.
...
Convert a 1D array to a 2D array in numpy
I want to convert a 1-dimensional array into a 2-dimensional array by specifying the number of columns in the 2D array. Something that would work like this:
...
TCP: can two different sockets share a port?
This might be a very basic question but it confuses me.
5 Answers
5
...
Default argument values in JavaScript functions [duplicate]
...
6 Answers
6
Active
...
JavaScript closures vs. anonymous functions
A friend of mine and I are currently discussing what is a closure in JS and what isn't. We just want to make sure we really understand it correctly.
...
What is a plain English explanation of “Big O” notation?
I'd prefer as little formal definition as possible and simple mathematics.
41 Answers
...