Hard Links, Junction Points and Symbolic Links都是windows系统的链接机制，链接文件，目录或者盘。
Hard Link
通常，一个hard link代表另一个文件（源文件），相当于它的复制品，但又不会复制这个文件。NTFS格式的硬盘都存储所有文件的属性和内容到inode上，还存储了一个ID，文件名指向那个inode。而hard link就是让文件名指向那个inode来达到不重复文件内容却等价。所以所有文件至少有一个hard link（文件本身就算是hard link），文件的属性里还有一个计数器，来记录有多少hard link链接到它那里，假如为0，系统则删除这个文件，ino继续阅读 »
CH41 Creating a Full Plugin
看到这里你可以停了，因为前面的姿势足够你完善自己的~/.vimrc脚本，去修复别人脚本的bug了，绝无讽刺的意思
往下学之前，建议先玩下Potion语言，这是个很小的语言，使用它的目的是为了辅助我们写vim script
CH42 Plugin Layout in the Dark Ages
~/.vim/colors/在这里的文件记录了vim的颜色主题，如果运行:color xxx就能看~/.vim/colors/xxx.vim的配色方案了，查看当前配色都有哪些用:hi
~/.vim/plugin/在这里的文件每次vim启动都会运行一次
~/.vim/ftdetect/这继续阅读 »
I have trained my algorithm on leetcode a period of time.
Today, I will explain my solution about Minimum Height Trees.
My solution beat ~95% against others but it is hard to explain what is I do.
Please allow me to introduce the solution from easy to hard. If you only need the
last solution, jump to继续阅读 »
Google Japan 第二次面试
面试官打来，寒暄了一两句，就说 should we start?
我以为像上次一样，直接一道 leetcode hard 难度拍过来，没想到竟然问基础知识！
http://yonghaowu.github.io//2016/10/25/GoogleJapanInterview/继续阅读 »
In recent years, non-relational data have attracted more and more attentions. Roughly speaking, all datasets that are hard to put into a rectangular table with rows and columns are non-relational datasets.继续阅读 »
(This post is rewritten to adapt to the latest release of pipeR)
Pipeline is receiving increasing attention in R community these days. It is hard to tell when it begins but more people start to use it since the easy-and-fast dplyr package imports the magic operator %>% from magrittr, the pioneer package of pipeline op继续阅读 »