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How to read a CSV file into a .NET Datatable
...m.Globalization;
// using System.IO;
static DataTable GetDataTableFromCsv(string path, bool isFirstRowHeader)
{
string header = isFirstRowHeader ? "Yes" : "No";
string pathOnly = Path.GetDirectoryName(path);
string fileName = Path.GetFileName(path);
string sql = @"SELECT * FROM ["...
Do I need to heartbeat to keep a TCP connection open?
I have two components that that communicate via TCP/IP. Component A acts as a server/listener and Component B is the client. The two should communicate as quickly as possible. There can only ever be one connection at any time (though that is aside to this question). A senior developer at my comp...
浅谈TCP优化 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...可以控制接收窗口的大小：
shell> sysctl -a | grep mem
net.ipv4.tcp_rmem = <MIN> <DEFAULT> <MAX>
如果我们出于传输性能的考虑，设置了一个足够大的缓冲，那么当大量请求同时到达时，内存会不会爆掉？通常不会，因为Linux本身有一个缓冲...
how do i remove a comma off the end of a string?
I want to remove the comma off the end of a string. As it is now i am using
10 Answers
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How important is the order of columns in indexes?
...mns involved.
Giving that rationale, the only difference is comparing two 'strings' that differ earlier versus later in the string. This is a tiny part of the total cost. There is no "first pass / second pass", as mentioned in one Answer.
So, what order should be used?
Start with column(s) tested...
Downloading MySQL dump from command line
...backup.sql
You can even go as far as auto-compressing the output using gzip (if your DB is very big):
$ mysqldump -u [uname] -p db_name | gzip > db_backup.sql.gz
If you want to do this remotely and you have the access to the server in question, then the following would work (presuming the...
Hash function that produces short hashes?
Is there a way of encryption that can take a string of any length and produce a sub-10-character hash? I want to produce reasonably unique ID's but based on message contents, rather than randomly.
...
const char *, char const *, char * const 异同？const修饰符各位置有何区...
const char *, char const *, char * const 异同？const修饰符各位置有何区别？const char * p = new char('a'); 这个是常字符，即p的内容不能被修改。char const * p 意义同上，没有区别。 这时，*...const char * p = new char('a'); 这个是常字符，即p的内容...
C read file line by line
... printf(line) is wrong! Do not do this. This opens your code to a string format vulnerability where you can freely read/write directly to memory via the stuff being printed. If I were to put %n/%p in the file and point the pointer back to an address in memory (in the string from the file) t...
Can a C++ enum class have methods?
...r.
You could easily add methods such that:
Fruit f("Apple");
and
f.ToString();
can be supported.
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