大约有 41,000 项符合查询结果（耗时：0.0582秒） [XML]
JavaScript: Check if mouse button down?
...semove='handleMove(this);'>Click and drag me!</div>
The :active selector handles the mouse click much better than mouse up/down, you just need a way of reading that state in the onmousemove event. For that I needed to cheat and relied on the fact that the default cursor is "auto" and I ju...
Can I add a UNIQUE constraint to a PostgreSQL table, after it's already created?
...
select <column> from <table> group by 1 having count(*) > 1; will give a report on duplicated values.
– Jasen
Aug 26 '16 at 22:57
...
Get list of passed arguments in Windows batch script (.bat)
...racters such as &? When I try to retrieve several the path of several selected files (using Send To menu and "%*" which pass the args to a .py) it stops the listing at the & caracters. So if for instance the second file contain a & in its name, the the part of the name after the & w...
Best way to show a loading/progress indicator?
...e.
By the way, Spinner has a different meaning in Android. (It's like the select dropdown in HTML)
share
|
improve this answer
|
follow
|
...
For each row return the column name of the largest value
...s.method = "first")) %>% # or 'last'
filter(dept_rank == 1) %>%
select(-dept_rank)
# A tibble: 3 x 3
# Groups: id [3]
id dept cnt
<chr> <chr> <dbl>
1 2 V1 8.
2 3 V2 5.
3 1 V3 9.
# if you wanted to keep the original wide data f...
How can one use multi threading in PHP applications
...pp on Azure Cloud Win server and if only the basic 1 core configuration is selected the multi-threading will not be available unless more cores are added.
– Milan
May 27 '14 at 17:57
...
Why does C# not provide the C++ style 'friend' keyword? [closed]
...ly.
Typically, a designer desires to expose only a few private methods to selected few other classes. For example, in a class factory pattern it may be desired that class C1 is instantiated only by class factory CF1. Therefore class C1 may have a protected constructor and a friend class factory C...
How can you find the unused NuGet packages in a solution?
...n also project > Optimize Used References . . .
A window will pop up. Select all references and remove them all. Then go back and re-add the ones that give you a compiler error.
share
|
improve...
Showing Travis build status in GitHub repo
...me or org}/{repository}
Click the Status Image (a pop-up will appear)
Select a branch, then click the dropdown Image URL ▼ and set it to Markdown ▼.
Copy Paste the code to your README.md
Git add, commit & push. Refresh Github and you'll see the image now.
...
What is the fastest way to send 100,000 HTTP requests in Python?
... Make sure you install the epoll reactor; otherwise you'll be using select/poll, and it will be very slow. Also, if you're going to actually try to have 100,000 connections open simultaneously (assuming your program is written that way, and the URLs are on different servers), you'll need to ...