本课内容目前为英文。
Errors with a name
A caller needs to tell "post not found" apart from "database down". Give an error a name with a sentinel, or give it details with your own error type.
本课内容目前为英文。
A caller needs to tell "post not found" apart from "database down". Give an error a name with a sentinel, or give it details with your own error type.