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LINGO使用指南 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...：
model:
!6发点8收点运输问题;
sets:
warehouses/ @file('1_2.txt') /: capacity;
vendors/ @file('1_2.txt') /: demand;
links(warehouses,vendors): cost, volume;
endsets
!目标函数;
min=@sum(links: cost*volume);
!需求约束;
@for(vendors(J):
@sum(warehouses(I): vol...
How to save/restore serializable object to/from file?
...able someClass to a file.
WriteToBinaryFile<SomeClass>("C:\someClass.txt", object1);
// Read the file contents back into a variable.
SomeClass object1= ReadFromBinaryFile<SomeClass>("C:\someClass.txt");
share
...
How to send a “multipart/form-data” with requests in python?
... Content-Disposition header with just the part name
'spam': ('spam.txt', open('spam.txt', 'rb'), 'text/plain'),
}
)
r = requests.post(
'http://httpbin.org/post',
data=mp_encoder, # The MultipartEncoder is posted as data, don't use files=...!
# The MultipartEncoder provides t...
一个故事告诉你比特币的原理及运作机制 - 创意 - 清泛网 - 专注C/C++及内核技术
...簿由私有改为公开，只要任何村民需要，都可以获得当前完整的账簿，账簿上记录了从账簿创建开始到当前所有的交易记录。
此言一出，下面立刻炸锅了。第一条还无所谓，但是第二条简直无法接受，因为账簿可是记录了所...
Install dependencies globally and locally using package.json
...
You could use a separate file, like npm_globals.txt, instead of package.json. This file would contain each module on a new line like this,
mongoose@1.4.0
node.io@0.3.3
jquery@1.5.1
jsdom@0.2.0
cron@0.1.2
Then in the command line run,
< npm_globals.txt xargs npm ins...
File Upload ASP.NET MVC 3.0
...ension != ".docx" && extension != ".rtf" && extension != ".txt")
{
ModelState.AddModelError("uploadError", "Supported file extensions: pdf, doc, docx, rtf, txt");
return View(viewModel);
}
// extract only the filename
var fileName = Path.GetFileName(R...
Why can't yield return appear inside a try block with a catch?
...so bad. But this would be bad:
yield return File.ReadAllText("c:\\missing.txt").Length;
So wouldn't it make more sense to evaluate this inside the preceeding try/catch block:
case just_before_try_state:
try
{
Console.WriteLine("a");
__current = File.ReadAllText("c:\\missi...
Why am I getting a “401 Unauthorized” error in Maven?
... 3.0</name>
<url>https://www.gnu.org/licenses/lgpl-3.0.txt</url>
</license>
<license>
<name>Apache Software License (ASL) version 2.0</name>
<url>http://www.apache.org/licenses/LICENSE-2.0.txt</url>
</lic...
cpuid汇编指令 - C/C++ - 清泛网 - 专注C/C++及内核技术
...后面有定义），其中EAX中的最低8位（AL）的值表示要得到完整的高速缓存的信息，需要执行EAX=2的CPUID指令的次数（一般都为1，在我这里的数台机器里，还没有为2的），同时，寄存器的最高位（bit 31）为0，表示该寄存器中的描...
HAproxy - Web负载均衡解决方案 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...站）
https://www.haproxy.org/download/1.8/src/haproxy-1.8.14.tar.gz （下载地址）
http://cbonte.github.io/haproxy-dconv/1.8/configuration.html （文档Haproxy 1.8 文档）
HAProxy提供高可用性、负载均衡以及基于TCP和HTTP应用的代理，支持虚拟主机，它是免费、...