<span>009-堆栈</span>

AI&nbsp;生成代码时，经常会写出一种看起来很谨慎的风格：到处判断空值、到处给默认值、到处包&nbsp;try/catch，读取环境变量时还特别喜欢加&nbsp;trim()&nbsp;和&nbsp;fallback。比如下面这种代码很常见：&nbsp;const&nbsp;port&nbsp;=&nbsp;Number(process.env.PORT?.trim()&nbsp;||&nbsp;3000);&nbsp;const&nbsp;apiKey&nbsp;=&nbsp;process.env.API_KEY?.trim()&nbsp;||&nbsp;&quot;&quot;;&nbsp;const&nbsp;timeout&nbsp;=&nbsp;Number(process.env.TIMEOUT&nbsp;||&nbsp;5000);&nbsp;try&nbsp;{&nbsp;//&nbsp;do&nbsp;something&nbsp;}&nbsp;catch&nbsp;(er...