大约有 40,000 项符合查询结果（耗时：0.0665秒） [XML]
What to add for the update portion in ConcurrentDictionary AddOrUpdate
...d] = sessionId;
Store a key/value pair into the dictionary unconditionally, overwriting any value for that key if the key already exists: Use the indexer’s setter
(See: http://blogs.msdn.com/b/pfxteam/archive/2010/01/08/9945809.aspx)
The indexer is atomic, too. If you pass a function inst...
【AI2+AI】人工智能舞姿识别App - 创客硬件开发 - 清泛IT社区，为创新赋能！
...机版排版不好，请使用PC浏览器查看）。
文章转载自：https://mc.dfrobot.com.cn/thread-308376-1-1.html
文章aia源码如下：
人工智能舞姿识别APP难度： 中级课程类型： 教程学科： 计算机科学年级水平：9~12年级
本教...
What does “hashable” mean in Python?
...y and a set member, because these data structures use the hash value internally.
All of Python’s immutable built-in objects are hashable, while no mutable containers (such as lists or dictionaries) are. Objects which are instances of user-defined classes are hashable by default; they all comp...
Unix command to prepend text to a file
...
Charles Duffy
219k3232 gold badges273273 silver badges333333 bronze badges
answered Jan 14 '15 at 18:52
shimeshime
...
Create a submodule repository from a folder and keep its git commit history
...ommit it
git filter-branch --subdirectory-filter <directory 1> -- --all
You should now have a git repository with the files from directory 1 in your repo's root with all related commit history.
Step 4
Create your online repository and push your new repository!
git remote add origin <...
How to find out line-endings in a text file?
...
@JessChadwick: Yes, but only if you explicitly install the tofrodos package with sudo apt-get install tofrodos - just as you'd have to run sudo apt-get install dos2unix to get dos2unix and unix2dos.
– mklement0
Dec 20 '15 at 1:54
...
How to pass a single object[] to a params object[]
...{ (object)"1", (object)"2" }));
As an array is a subtype of object, this all works out. Bit of an odd solution though, I'll agree.
share
|
improve this answer
|
follow
...
Solutions for INSERT OR UPDATE on SQL Server
...to do: the first one inserts, the second updates the record. Adding a lock allow this to happen in a very short time-frame, preventing an error.
– Jean Vincent
Feb 29 '12 at 11:31
...
C char array initialization
...he question, it's worth pointing out that the C standard requires any partially-complete array initialisation to be padded with zero for the remaining elements (by the compiler). This goes for all data types, not just char.
– paddy
Sep 8 '13 at 21:54
...
How do I implement interfaces in python?
...interface, a module that is a part of the Zope Component Architecture, a really awesomely cool component framework. Here you don't subclass from the interfaces, but instead mark classes (or even instances) as implementing an interface. This can also be used to look up components from a component reg...