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淘宝应对双\"11\"的技术架构分析 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
淘宝应对双"11"的技术架构分析双11最热门的话题是TB，最近正好和阿里的一个朋友聊淘宝的技术架构，发现很多有意思的地方，分享一下他们的解析资料：淘宝海量数据产品技术... 双“11”最热门的话题是TB ，最近正好和阿里的...
Round a Floating Point Number Down to the Nearest Integer?
...
Nice addition. int(-1.1) == -1 while -1.1//1 == -2.0 however decimal.Decimal('-1.1')//1 == decimal.Decimal('-1') (as documented, claim 2 isn't true for decimal), so relying on how // behaves is not fully stable, even today.
– Tino
Jun ...
Apache两种工作模式区别及配置切换 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...是Apache 1.3中采用的模式。prefork本身并没有使用到线程，2.0版使用它是为了与1.3版保持兼容性；另一方面，prefork用单独的子进程来处理不同的请求，进程之间是彼此独立的，这也使其成为最稳定的MPM之一。
若使用prefork，...
搭建高可用mongodb集群（四）—— 分片 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...下：
public class TestMongoDBShards {
public static void main(String[] args) {
try {
List addresses = new ArrayList();
ServerAddress address1 = new ServerAddress("192.168.0.136" , 20000);
ServerAddress address2...
Finding all possible combinations of numbers to reach a given sum
...tinue
for i in range(len(numbers)):
n = numbers[i]
remaining = numbers[i+1:]
subset_sum(remaining, target, partial + [n])
if __name__ == "__main__":
subset_sum([3,9,8,4,5,7,10],15)
#Outputs:
#sum([3, 8, 4])=15
#sum([3, 5, 7])=15
#sum([8, 7])=15
...
C# catch a stack overflow exception
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Starting with 2.0 a StackOverflow Exception can only be caught in the following circumstances.
The CLR is being run in a hosted environment* where the host specifically allows for StackOverflow exceptions to be handled
The stackoverflow ...
MediaNotification 媒体通知扩展：管理媒体播放器通知，支持播放控制 · Ap...
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Which version of C# am I using
....0
C# 1.2 (bizarrely enough); released
with .NET 1.1
C# 2.0 released with .NET 2.0
C# 3.0 released with .NET 3.5
C# 4.0 released with .NET 4
C# 5.0 released with .NET 4.5
C# 6.0 released with .NET 4.6
C# 7.0 is released with .NET 4.6.2
C# 7.3 is ...
How to initialise a string from NSData in Swift
... = String(data: fooData, encoding: .utf8)
Older swift version:
in Swift 2.0:
import Foundation
var dataString = String(data: fooData, encoding: NSUTF8StringEncoding)
in Swift 1.0:
var dataString = NSString(data: fooData, encoding:NSUTF8StringEncoding)
...
Web Reference vs. Service Reference
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Will that require .NET 2.0 too on the computer? Or .NET 4.0 will be able to handle the .NET 2.0 based "Web Reference" technology? I want to know because I am deploying a SOAP webservice as "Web Reference" in a .NET 4.0 application.
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