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开源邮件传输代理软件 -- Postfix 介绍 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...兼容性。1. postfix是免费的：
postfix想要作用的范围是广大的Internet用户，试图影响大多数的Internet上的电子邮件系统，因此它是免费的。
2. 更快：
postfix在性能上大约比sendmail快三倍。一部运行postfix的台式PC每天可以收发上...
select、poll、epoll之间的区别总结[整理] - C/C++ - 清泛网 - 专注C/C++及内核技术
...把fd_set从内核空间拷贝到用户空间。
总结：
select的几大缺点：
（1）每次调用select，都需要把fd集合从用户态拷贝到内核态，这个开销在fd很多时会很大
（2）同时每次调用select都需要在内核遍历传递进来的所有fd，这个开销...
Objective-C and Swift URL encoding
...cters will also encode UTF-8 characters needing encoding.
Pre iOS7 use Core Foundation
Using Core Foundation With ARC:
NSString *escapedString = (NSString *)CFBridgingRelease(CFURLCreateStringByAddingPercentEscapes(
NULL,
(__bridge CFStringRef) unescaped,
NULL,
CFSTR("!*'();...
开源MQTT网关：EMQX vs Mosquitto - 创客硬件开发 - 清泛IT社区，为创新赋能！
...键业务场景。EMQX 采用 Erlang/OTP 编写，这是一种用于构建大规模可扩展软实时系统的编程语言。与 Mosquitto 不同，EMQX 在设计之初即采用了分布式集群架构，可以轻松实现弹性水平扩展，从而稳定承载大规模的 MQTT 客户端接入。最...
“File not found” when running new LibGDX project
...ran into it; setting the Desktop working directory to the assets folder in core worked for me.
– naftalimich
Mar 4 '16 at 6:01
...
BSS段、数据段、代码段、堆与栈 剖析 - C/C++ - 清泛网 - 专注C/C++及内核技术
...指用来存放程序执行代码的一块内存区域。这部分区域的大小在程序运行前就已经确定，并且内存区域通常属于只读, 某些架构也允许代码段为可写，即允许修改程序。在代码段中，也有可能包含一些只读的常数变量，例如字符...
Apache Prefork vs Worker MPM
...lation you might get something like:
> httpd -l
Compiled in modules:
core.c
mod_win32.c
mpm_winnt.c
http_core.c
mod_so.c
As of version 2.2 this is the list of available core features and MPM modules:
core - Core Apache HTTP Server features that are always available
mpm_common - A c...
Where can I find a NuGet package for upgrading to System.Web.Http v5.0.0.0?
...
You need the Microsoft.AspNet.WebApi.Core package.
You can see it in the .csproj file:
<Reference Include="System.Web.Http, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
<SpecificVersion>False<...
EF Code First foreign key without navigation property
...
Although this post is for Entity Framework not Entity Framework Core, It might be useful for someone who wants to achieve the same thing using Entity Framework Core (I am using V1.1.2).
I don't need navigation properties (although they're nice) because I am practicing DDD and I want Pare...
Make git automatically remove trailing whitespace before committing
...
Those settings (core.whitespace and apply.whitespace) are not there to remove trailing whitespace but to:
core.whitespace: detect them, and raise errors
apply.whitespace: and strip them, but only during patch, not "always automatically"
...