为了学学后端（express）和前端（bootstrap），开坑做个gists，尽量用CoffeeScript

想了想数据库还是用mysql吧，毕竟Pi上可以用，可以本地测试。顺便提高一下我渣渣的数据库

晚上稍微写了点，发现模板引擎如果用ejs的话前端和后端JS/CS切换得太蛋疼……初步考虑用coffeekup，一个可以渲染HTML的CoffeeScript DSL……但是完全用CoffeeScript写HTML有点诡异的感觉……

前端的代码编辑/显示选用Ace，也就是GitHub用的

编译用了cake，算是和CoffeeScript配套，比起直接写shell脚本显得逼格高多了。从coffeekup抄了个run方法，相当好使

run = (args...) ->
  for a in args
    switch typeof a
      when 'string' then command = a
      when 'object'
        if a instanceof Array then params = a
        else options = a
      when 'function' then callback = a

  command += ' ' + params.join ' ' if params?
  cmd = spawn '/bin/sh', ['-c', command], options
  cmd.stdout.on 'data', (data) -> process.stdout.write data
  cmd.stderr.on 'data', (data) -> process.stderr.write data
  process.on 'SIGHUP', -> cmd.kill()
  cmd.on 'exit', (code) -> callback() if callback? and code is 0

在存储提交来的代码的时候出现问题 ` errno: -2,code: ‘ENOENT’`,是因为打开的目录不存在，用__dirname倒腾半天弄好了

写package.json的时候遇到的:

In the simplest terms, the tilde matches the most recent minor version (the middle number). ~1.2.3 will match all 1.2.x versions but will miss 1.3.0.

The caret, on the other hand, is more relaxed. It will update you to the most recent major version (the first number). ^1.2.3 will match any 1.x.x release including 1.3.0, but will hold off on 2.0.0.