原文：程序人生
题记：上周做 BBL 里讲了我们 Tubi TV 内部做 DSL 的一些简单实践，大家反馈不错。有同事建议我给大家先补补 FSM，之后再进阶 CFG，可能会更顺畅些。想想也是。于是我自个花了一两个小时，重温了一些课件。马上要回过了，做 BBL 是三周后的事情了，就没先忙写 slides，写了篇文章。本欲留作他用，考虑再三觉得不合适，干脆在公众号上发出来。这篇文章有些干，看看能有多少阅读（我估计也就 3000+），会掉多少粉。
在谈论一般意义的状态机时，我们先看看有限状态机，Finite State Machine，简称 FSM。
在计算理论（Theory of computation）中，FSM 是一切的基础，也是能力最为有限的机器。在其能力之上是 CFL（Context Free Language），然后是 Turing Machine。
FSM 解决一个输入序列，经过 FSM，最终停留在什么状态这样一个问题。对于一个字符串是否以 \0 结尾（C 语言的字符串结构），FSM 可以给出答案。
| server { | |
| listen 8443 default ssl; | |
| server_name www.yourdomain.com; | |
| ssl on; | |
| ssl_certificate /etc/nginx/conf.d/cert.pem; | |
| ssl_certificate_key /etc/nginx/conf.d/cert.key; | |
| client_max_body_size 50M; | |
| error_log /var/log/nginx/elasticsearch-errors.log; |
Based on D3.JS and Dimple, ChartFactory provide the ability to build quickly D3.JS charts without coding any lines of javascript. Just define your dashboard in a JSON and voila !
charts: [
{id:'chart1',
width:800,height:250,
xAxis:{type:'Category',field: "Month",orderRule:'Date'},
| ; Autohotkey Capslock Remapping Script | |
| ; Danik | |
| ; More info at http://danikgames.com/blog/?p=714 | |
| ; danikgames.com | |
| ; | |
| ; Functionality: | |
| ; - Deactivates capslock for normal (accidental) use. | |
| ; - Hold Capslock and drag anywhere in a window to move it (not just the title bar). | |
| ; - Access the following functions when pressing Capslock: | |
| ; Cursor keys - J, K, L, I |
| # yum list \*openssl\* | |
| yum install -y openssl098e | |
| yum install -y zlib | |
| ln -s /usr/lib64/libssl.so.0.9.8e /usr/lib64/libssl.so.0.9.8 | |
| ln -s /usr/lib64/libcrypto.so.0.9.8e /usr/lib64/libcrypto.so.0.9.8 | |
| ln -s /lib64/libbz2.so.1 /lib64/libbz2.so.1.0 | |
| wget https://bitbucket.org/pypy/pypy/downloads/pypy-1.8-linux64.tar.bz2 | |
| tar -xf pypy-1.8-linux64.tar.bz2 | |
| cp -r pypy-1.8 /opt | |
| ln -s /opt/pypy-1.8/bin/pypy /usr/local/bin |
| # -*- coding: utf-8 -*- | |
| from django import forms | |
| from crispy_forms.helper import FormHelper | |
| from crispy_forms.layout import Layout, Div, Submit, HTML, Button, Row, Field | |
| from crispy_forms.bootstrap import AppendedText, PrependedText, FormActions | |
| class MessageForm(forms.Form): | |
| text_input = forms.CharField() |
| #! /bin/sh | |
| ### BEGIN INIT INFO | |
| # Provides: redis-server | |
| # Required-Start: $syslog | |
| # Required-Stop: $syslog | |
| # Should-Start: $local_fs | |
| # Should-Stop: $local_fs | |
| # Default-Start: 2 3 4 5 | |
| # Default-Stop: 0 1 6 | |
| # Short-Description: redis-server - Persistent key-value db |
| # -*- coding: utf-8 -*- | |
| """MyCompany Fabric script. | |
| * Deploy code | |
| * Set up a local development environment | |
| There are two ways to deploy the myrepo code: | |
| 1. :func:`deploy` will do a full virtualenv installation/update and expand a | |
| tarball of the specified git revision (defaults to HEAD) to a timestamped |
