大约有 41,000 项符合查询结果（耗时：0.0533秒） [XML]
Why is the standard session lifetime 24 minutes (1440 seconds)?
...hy the standard value is 1440 and how it is calculated?
What is the basis for this calculation?
2 Answers
...
Intro to GPU programming [closed]
...as this huge massively parallelized supercomputer on their desktop in the form of a graphics card GPU.
9 Answers
...
How can I install a local gem?
...
Yup, when you do gem install, it will search the current directory first, so if your .gem file is there, it will pick it up. I found it on the gem reference, which you may find handy as well:
gem install will install the named
gem. It will attempt a local
installation (i.e. a .ge...
Batch script loop
...dicates that I would either have to copy/paste 100 copies of this command, OR use a for loop, but the for loop expects a list of items, hence I would need 200 files to operate on, or a list of 200 items, defeating the point.
...
What is the parameter “next” used for in Express?
...
It passes control to the next matching route. In the example you give, for instance, you might look up the user in the database if an id was given, and assign it to req.user.
Below, you could have a route like:
app.get('/users', function(req, res) {
// check for and maybe do something with ...
Thread Safety in Python's dictionary
...
Python's built-in structures are thread-safe for single operations, but it can sometimes be hard to see where a statement really becomes multiple operations.
Your code should be safe. Keep in mind: a lock here will add almost no overhead, and will give you peace of min...
How can you sort an array without mutating the original array?
Let's suppose I wanted a sort function that returns a sorted copy of the inputted array. I naively tried this
6 Answers
...
How do you downgrade rubygems?
...
Eh, much better to sudo gem update --system 1.4.2 or rvm install rubygems 1.4.2
– mrm
Aug 29 '11 at 4:23
add a comment
|
...
How to check if a user is logged in (how to properly use user.is_authenticated)?
...his website but just can't seem to figure out how to do this as it's not working. I need to check if the current site user is logged in (authenticated), and am trying:
...
Should I always use a parallel stream when possible?
...parallel stream has a much higher overhead compared to a sequential one. Coordinating the threads takes a significant amount of time. I would use sequential streams by default and only consider parallel ones if
I have a massive amount of items to process (or the processing of each item takes time ...