大约有 31,840 项符合查询结果（耗时：0.0289秒） [XML]
What are all the uses of an underscore in Scala?
...
The ones I can think of are
Existential types
def foo(l: List[Option[_]]) = ...
Higher kinded type parameters
case class A[K[_],T](a: K[T])
Ignored variables
val _ = 5
Ignored parameters
List(1, 2, 3) foreach { _ =>...
GroupBy pandas DataFrame and select most common value
I have a data frame with three string columns. I know that the only one value in the 3rd column is valid for every combination of the first two. To clean the data I have to group by data frame by first two columns and select most common value of the third column for each combination.
...
Does const mean thread-safe in C++11?
... to say on thread-safety:
[1.10/4]
Two expression evaluations conflict if one of them modifies a memory location (1.7) and the other one accesses or modifies the same memory location.
[1.10/21]
The execution of a program contains a data race if it contains two conflicting actions in different threa...
Python: split a list based on a condition?
...
@dansalmo Especially since you can make it a one-liner with the for-cycle, and if you wanted to append something more complicated than x, you can make it into one append only: for x in mylist: (good if isgood(x) else bad).append(x)
– yo'
...
Is there a Google Voice API? [closed]
...
Well...
These are PHP.
There is an sms one from google here.
And github has one here.
Another sms one is here. However, this one has a lot more code, so it may take up more space.
share...
Instance variables vs. class variables in Python
I have Python classes, of which I need only one instance at runtime, so it would be sufficient to have the attributes only once per class and not per instance. If there would be more than one instance (which won't happen), all instance should have the same configuration. I wonder which of the follow...
How can I do a case insensitive string comparison?
... string is better practice than String since it is a language keyword. For one, String could be something other than System.String, whereas string cannot be. Also, string is more or less guaranteed to exist in C#, whereas String is technically part of .NET rather than C#.
– Dav...
Can I recover a branch after its deletion in Git?
...to recreate the branch from there.
Credit to @Cascabel for this condensed/one-liner version.
You can do it in one step:
git checkout -b <branch> <sha>
share
|
improve this answer
...
Setting up a common nuget packages folder for all solutions when some projects are included in multi
...xternal and internal package sources with projects referenced in more than one solution. I just got this working with one of our code bases today and it seems to be working with the developer workstations and our build server. The below process has this scenario in mind (although it shouldn't be har...
Git status ignore line endings / identical files / windows & linux environment / dropbox / mled
...or git. Try using bitbucket (it have free private repositories), just make one small repo and test on your 2 machines with some small text files.
– Saša Šijak
Dec 13 '13 at 9:11
...