大约有 44,600 项符合查询结果（耗时：0.0359秒） [XML]
Git 工具 - 子模块(submodule)：一个仓库包含另一个仓库 - 开源 & Github -...
...。
所以，我们将会进入子模块目录，基于 git diff 的第二个 SHA-1 创建一个分支然后手动合并。
$ cd DbConnector
$ git rev-parse HEAD
eb41d764bccf88be77aced643c13a7fa86714135
$ git branch try-merge c771610
(DbConnector) $ git merge try-merge
Auto-me...
【内核源码】linux UDP实现 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...有可能导致单个链表的上有很多socket，导致查询慢
添加第二个hash表，使用地址和端口作为key， 来应对上述情况。 查询的时候只用查两个hash链表中较短的那个。
udp sencondary hash
connect()
sys_connect()->inet_dgram_connect()->ip4_datagram_c...
How do I do base64 encoding on iOS?
..., 'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/'
};
@implementation NSString (NSStringAdditions)
+ (NSString *) base64StringFromData: (NSData *)data length: (int)length {
unsigned long ixtext, lentext;
long ctremaining;
...
C++并发编程（中文版） - 文档下载 - 清泛网 - 专注C/C++及内核技术
...… 1
1.1 什么是并发… 1
1.1.1 计算机系统的并发… 1
1.1.2 并发的方法… 3
1.2 为什么使用并发… 4
1.2.1 因划分重点而使用并发… 5
1.2.2 为了提高性能而使用并发… 5
1.2.3 什么时候不使用并发… 6
1.3 在C++中使用并发和多线程… ...
Objective-C 2.0 Mac和iOS开发实践指南 PDF扫描版 - 文档下载 - 清泛网 - ...
Objective-C 2.0 Mac和iOS开发实践指南 PDF扫描版Objective-C Mac iOS《Objective-C 2.0 Mac和iOS开发实践指南》专门为那些想要学习Objecti Ve-C以便为Mac OS x或iOS编写程序的程序员量身打造。《Objectiv...截图：
《Objective-C 2.0 Mac和iOS开发实践指南...
Remove rows with all or some NAs (missing values) in data.frame
... final[complete.cases(final), ]
gene hsap mmul mmus rnor cfam
2 ENSG00000199674 0 2 2 2 2
6 ENSG00000221312 0 1 2 3 2
na.omit is nicer for just removing all NA's. complete.cases allows partial selection by including only certain columns of the dataframe:
...
How to remove a key from Hash and get the remaining hash in Ruby/Rails?
...
|
edited Mar 20 '15 at 1:27
answered Jun 19 '12 at 17:03
...
Calculate difference in keys contained in two Python dictionaries
...
21 Answers
21
Active
...
Is log(n!) = Θ(n·log(n))?
...
Remember that
log(n!) = log(1) + log(2) + ... + log(n-1) + log(n)
You can get the upper bound by
log(1) + log(2) + ... + log(n) <= log(n) + log(n) + ... + log(n)
= n*log(n)
And you can get the lower bound by doing a simil...
Why does Math.Round(2.5) return 2 instead of 3?
In C#, the result of Math.Round(2.5) is 2.
15 Answers
15
...