大约有 44,000 项符合查询结果（耗时：0.0586秒） [XML]
Pandas get topmost n records within each group
...
Yes, I think that's it. Overlooked this somehow. Do you know good way to number records within group?
– Roman Pekar
Nov 19 '13 at 10:48
...
What is the difference between string primitives and String objects in JavaScript?
...art from being a full fledged object, serves as a wrapper for v8::String.
Now it is only logical, a call to new String('').method() has to unbox this v8::StringObject's v8::String before executing the method, hence it is slower.
In many other languages, primitive values do not have methods.
The...
Hadoop “Unable to load native-hadoop library for your platform” warning
...y install, it is here:
/opt/hadoop/lib/native/libhadoop.so.1.0.0
And I know it is 64-bit:
[hadoop@VMWHADTEST01 native]$ ldd libhadoop.so.1.0.0
./libhadoop.so.1.0.0: /lib64/libc.so.6: version `GLIBC_2.14' not found (required by ./libhadoop.so.1.0.0)
linux-vdso.so.1 => (0x00007fff43510000)
lib...
Is using a lot of static methods a bad thing?
... Math object encapsulate anything but behaviour?
– JonoW
Apr 15 '09 at 17:22
10
He just said susp...
Test iOS app on device without apple developer program or jailbreak
...lso, you must do this for every .sdk you want to be able to run on device.
Now, in your project settings, you can change Code Signing Identity to Don't Code Sign.
Your app should now build and install on your device successfully.
UPDATE:
There are some issues with iOS 5.1 SDK that this method may no...
How does the algorithm to color the song list in iTunes 11 work? [closed]
...
Pretty awesome solution. Now need a port from Mathematica to Objective-C, that is a hard struggle.
– loretoparisi
Dec 3 '12 at 20:29
...
Setting up maven dependency for SQL Server
...encies for it and try to find out SQL Server connector on the same way I know MySql has it.
8 Answers
...
What is a patch in git version control?
...TS)
See also Contributing to Rails with Git as another concrete example.
Nowadays, the GitHub pull request makes it really easy to apply patches on GitHub repos, which is useful when you aren't a direct contributor (ie you have no right to directly push to a repo).
Actually, fairly recently GitHub...
What does “dereferencing” a pointer mean?
...ate, see "More about memory addresses, and why you probably don't need to know" at the end of this answer.
When you want to access the data/value in the memory that the pointer points to - the contents of the address with that numerical index - then you dereference the pointer.
Different computer...
Should the hash code of null always be zero, in .NET
...m, either re-implement the hash code to return non-zero, add a default "unknown" enum entry equivalent to null, or simply don't use nullable enums.
Interesting find, by the way.
Another problem I see with this generally is that the hash code cannot represent a 4 byte or larger type that is nullabl...