第02周：异常处理

本周作业（必交）

1. 我们在数据库操作的时候，比如 dao 层中当遇到一个 sql.ErrNoRows 的时候，是否应该 Wrap 这个 error，抛给上层。为什么，应该怎么做请写出代码？

References

• https://www.infoq.cn/news/2012/11/go-error-handle/

• https://golang.org/doc/faq#exceptions

• https://www.ardanlabs.com/blog/2014/10/error-handling-in-go-part-i.html

• https://www.ardanlabs.com/blog/2014/11/error-handling-in-go-part-ii.html

• https://www.ardanlabs.com/blog/2017/05/design-philosophy-on-logging.html

• https://medium.com/gett-engineering/error-handling-in-go-53b8a7112d04

• https://medium.com/gett-engineering/error-handling-in-go-1-13-5ee6d1e0a55c

• https://rauljordan.com/2020/07/06/why-go-error-handling-is-awesome.html

• https://morsmachine.dk/error-handling

• https://crawshaw.io/blog/xerrors

• https://dave.cheney.net/2012/01/18/why-go-gets-exceptions-right

• https://dave.cheney.net/2015/01/26/errors-and-exceptions-redux

• https://dave.cheney.net/2014/11/04/error-handling-vs-exceptions-redux

• https://dave.cheney.net/2014/12/24/inspecting-errors

• https://dave.cheney.net/2016/04/07/constant-errors

• https://dave.cheney.net/2019/01/27/eliminate-error-handling-by-eliminating-errors

• https://dave.cheney.net/2016/06/12/stack-traces-and-the-errors-package

• https://dave.cheney.net/2016/04/27/dont-just-check-errors-handle-them-gracefully

• https://blog.golang.org/errors-are-values

• https://blog.golang.org/error-handling-and-go

• https://blog.golang.org/go1.13-errors

• https://commandcenter.blogspot.com/2017/12/error-handling-in-upspin.html

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