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Postfix发信的频率控制几个参数 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...的配置来调节postfix的性能，这些参数都是通过mail.cf配置文件进行配置的，修改以后不要忘了运行postfix reload命令来使配置生效。
1． 进程数限制
可以通过default_process_limit 参数来控制postfix系统同时可以运行的最大进程数目。缺...
What does character set and collation mean exactly?
...
I suggest to use utf8mb4_unicode_ci, which is based on the Unicode standard for sorting and comparison, which sorts accurately in a very wide range of languages.
shar...
How to reverse a string in Go?
... of the input in bytes. It does not correspond to its length. - Not all utf8's runes are of the same size. It can be either 1, 2, 4, or 8. - You should use unicode/ut8 package's method RuneCountInString to get the length of the rune.
– Anvesh Checka
May 2...
Log all queries in mysql
... `thread_id` bigint(21) unsigned NOT NULL
) ENGINE=CSV DEFAULT CHARSET=utf8 COMMENT='Slow log'
CREATE TABLE `general_log` (
`event_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP
ON UPDATE CURRENT_TIMESTAMP,
`user_host` mediumtext NOT NULL,
`thread_id` b...
How to stop app that node.js express 'npm start'
...ndefined') {
fs.writeFileSync('.server.pid', child.pid, {
encoding: 'utf8'
})
}
build/stop-server.js
import fs from 'fs'
import kill from 'tree-kill'
const serverPid = fs.readFileSync('.server.pid', {
encoding: 'utf8'
})
fs.unlinkSync('.server.pid')
kill(serverPid)
package.json
"sc...
How to create CSV Excel file C#? [closed]
... public byte[] ExportToBytes()
{
return Encoding.UTF8.GetBytes(Export());
}
//get the csv value for field.
private string MakeValueCsvFriendly(object value)
{
if (value == null) return "";
if (value is Nullable &&...
What is the difference between UTF-8 and ISO-8859-1?
... I had seen where Umlaut's are not supposedly converted with UTF8. We saw examples of this and in searching we found the ISO-8859-1 and it seems to work. We have a lot of German Scientist we work with.
– Aggie Jon of 87
Jul 25 '18 at 15:20
...
BMP 和 DIB - C/C++ - 清泛网 - 专注C/C++及内核技术
...分组成：
请注意：1,2,3,4组成了BMP，2,3,4组成了DIB
1.BMP文件头：
BMP文件头数据结构含有BMP文件的类型、文件大小和位图起始位置等信息。
其结构定义如下：
2. DIB头
BMP位图信息头数据用于说明位图的尺寸等信息。下面两...
ATL创建的ActiveX(COM组件)实现JS回调 - C/C++ - 清泛网 - 专注C/C++及内核技术
...的ActiveX(COM组件)实现JS回调最近公司的产品需要使用ActiveX文件上传。讨论了基本所有的技术，最后还是决定C++搞个ActiveX。。。但上传的回调费了半天劲，才搞定。代码...最近公司的产品需要使用ActiveX文件上传。讨论了基本所有...
Visul C++中CList用法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ngList ，使用方法相类似。CList是一个双向链表类。
1、头文件名不可少
Clist类定义在Afxtempl.h 头文件中，因此在使用该类时，需要加这个头文件名。
2、理解CList的声明和构造方法
CList的声明如下：
template< class TYPE, class ARG_TYP...