Triftrw is a general purpose, serialization-only, thrift encoding libraries written by Uber. Since there’re some thrift code generation ralated issues in my working project right now, I decide to give myself a chance to dive into this attractive library. Of course, the Go implementation. AST There are three basic interfaces in thriftrw’s ast package Node is a single element in the Thrift AST. Walker provides acccess to information about the state of the AST walker.
Operators Are Software SREs. The key tenet of SRE is automating systems administration by writing software to run your software. An Operator is like an automated SRE for its applications.
On production enviroment, chef server is recommended when you need to manage more than one machine at a time. three types: Hosted Enterprise Chef On Premises (Private) Enterprise Chef Open Source Chef There is a good tutorial about setting up chef server 12. However, there are some differences when applying to the latest chef-server release version. For our example, Enviroment: workstation: macOS Sierra 10.12.2 chef server and nodes: Vagrant based CentOS 6.
这几天在做一个小项目的时候，用到了Freewall这个很nice的插件。它可以很方便的替你实现很多不错的grid layout。但在用到Pinterest style layout的时候遇到了一个问题。官方给出的example如下:
一直很好奇很多编程问题，比如求大数阶乘，大数的排列组合等，要求将输出结果对$ 1e9+7 $(=1000000007)取模。为什么是这样一个数呢？今天一查，网上还是有不少讨论的。总结一下有下面几个原因。
如何产生符合一定分布的随机变量？对于简单的随机变量，我们往往可以直接获得其概率分布函数$ F(x)=P(X\leqslant x) $。但是对于更多复杂的随机变量来说，获得其概率分布的解析表达式是不可能的。对于这种情况，要产生这样的随机变量就需要另辟蹊径。Rejection sampling就是其中最具代表性的一种。下文主要参考了Karl Sigman的notes。