生命的意义 开篇
2017-05-04 21:29:59
生命的意义（meaning of life）——这是一个哲学家们经常讨论的问题，也似乎是一个非常重要、迫切的问题。相信很多人都曾经思考过、寻找过。
人生来是为了什么？人生有什么意义？我为什么在这里？人为什么存在？我为什么要活着？——这些问题其实都关涉到相同的一个点，就是“生命的意义”。
Nginx中fastcgi_pass直接写unix和使用upstream
2017-03-26 21:48:47
[开发运维 | Dev Ops] Nginx, 服务器, 网页
这两天虽然很忙，但是由于某些情况需要折腾一个反向代理服务器。解决了我一个困扰了很久的问题——为什么nginx不能检测后面php-fpm或者hhvm运行的状态；如果php-fpm或者hhvm挂了为什么nginx的fastcgi_cache_use_stale的参数不起作用？
我一直想当php-fpm或者hhvm挂掉的时候nginx能够提供cache的旧页面，但是fastcgi_cache_use_stale的参数似乎不起作用，今天仔细地读了一个nginx的文档。为了实现这个目的，我们需要用的是fastcgi_cache_use_stale 中 error这个参数，然而error这个参数的说明中提到了一句话
EECS3214 Computer Network Protocols and Applications
2017-01-10 9:49:23
[专业笔记 | Academic] IP, Java, 服务器, 网络
This course includes TCP/IP architecture. 这是一门有关网络的基础课程，主要涉及Layer3-5。
This course introduce very fundamental network knowledges. It covers some old technology but that is very critical.
We will study the TCP/IP protocol through out the whole course. Advance topics includes P2P system, multimedia communication (VoIP), network security(IPSec SSL), wireless sensor networks. Top-down approach. Start from top(Application) to bot(Network). More algorithmic. More programming.
Simple core, but complex edges.
EECS2011 Fundamentals of Data Structures
2016-12-08 17:22:52
数据结构课程，其实用Java而不是用C / PASCAL来讲让我有点不太适应。
This content is for YorkU EECS 2011. As usual, I will post some "interesting" course note. This course is not that difficult. And our prof's ppt is so nice. Try not to miss any lecture and you will learn a lot from him. My professor is Andy Mirzaian.
CloudKit开发手记——队列管理
网上现在大部分的教程（包括苹果官方的CloudKit Quick Start）讲述的都是一种简易的方法（convience methods），我这里将要讲述的是如何有效使用队列进行数据库操作，使得操作更加有效规范可控。
EECS2031 Software Tools
2016-09-12 14:44:06
[专业笔记 | Academic] C, Linux, Shell, 代码
This course introduces very very fundamental C/shell programming skills on linux.
We are using C89 standard in this EECS 2031 course. That means you cannot declare the iterator variable in a for loop. And you should be very careful when you are trying to copy any C code from Google or Stack Overflow. Because those code fragments might be written in C with C99 standard or Cpp. Professor is very nice but TAs are not that efficient. We have to wait a long time for the grading.
EECS2030 Advanced Object Oriented Programming
2016-06-11 23:24:31
EECS2030课程的笔记
This content is for YorkU EECS 2030. I took this course in summer 2016. My professor Navid Mohaghegh is a very nice professor. I do strongly recommend his course.
定制XCode的UI控件
2016-05-17 14:54:16
[应用开发 | App Dev] Apple, iPhone, Mac OS X, 代码
有时候我们需要一些深度定制的并且多次多次复用的UI控件，为了模块化程序，在iOS8 及以后，我们可以将常用的定制UI控件放到自己的Kit里面，在不同的项目中重复使用。
本文主要记录怎样定制UI控件