大约有 45,000 项符合查询结果（耗时：0.0499秒） [XML]
How to install Java SDK on CentOS?
I have CentOS 5, but I don't know the steps to install Java SDK on Linux.
12 Answers
...
How do I check if a variable exists?
I want to check if a variable exists. Now I'm doing something like this:
11 Answers
11...
Sort a list by multiple attributes?
...th sort on 2 criteria and use reverse=True. In case someone else wants to know how, you can wrap your criteria (functions) in parenthesis:
s = sorted(my_list, key=lambda i: ( criteria_1(i), criteria_2(i) ), reverse=True)
s...
Can't get Gulp to run: cannot find module 'gulp-util'
...
So with a 150K views on this question alone, I'd love to know what the root cause of this is... This occurs quite frequently for me and I'm guessing I'm not the only one. This adds up to a lot of wasted time!
– cloakedninjas
Jul 7 '17 at 9:41
...
What does the “yield” keyword do?
... print(i)
0
1
4
Here it's a useless example, but it's handy when you know your function will return a huge set of values that you will only need to read once.
To master yield, you must understand that when you call the function, the code you have written in the function body does not run. The ...
Get nth character of a string in Swift programming language
... Note: This answer has been already edited, it is properly implemented and now works for substrings as well. Just make sure to use a valid range to avoid crashing when subscripting your StringProtocol type. For subscripting with a range that won't crash with out of range values you can use this impl...
Maven fails to find local artifact
...mvn -U will force update from remote repository - again, assuming you have now populated remote with said artifact.
share
|
improve this answer
|
follow
|
...
What does `:_*` (colon underscore star) do in Scala?
...s taken as single arg
f(x:_*) // 2 as x is "unpacked" as a Seq[Any]*
So now we know what :_* do is to tell compiler : please unpack this argument and bind those elements to the vararg parameter in function call rather than take the x as a single argument .
So in a nutshell, the :_* is to remove ...
background function in Python
...got a function that downloads the image needed and saves it locally. Right now it's run inline with the code that displays a message to the user, but that can sometimes take over 10 seconds for non-local images. Is there a way I could call this function when it's needed, but run it in the backgroun...
Regex to validate password strength
...ed to include your test case @PriyankBolia. See new robulink, which should now work.
– lsu_guy
Sep 18 at 19:56
add a comment
|
...