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Merge pull request #3287 from bravequickcleverfibreyarn/listing-12-02 

ch12-03: `expect` is not used multitude times by this chapter
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Chris Krycho 2024-04-19 13:36:49 -06:00 committed by GitHub
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src/ch12-03-improving-error-handling-and-modularity.md
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@ -23,13 +23,13 @@ example, the file could be missing, or we might not have permission to open it.
Right now, regardless of the situation, we’d print the same error message for
everything, which wouldn’t give the user any information!
Fourth, we use `expect` repeatedly to handle different errors, and if the user
runs our program without specifying enough arguments, they’ll get an `index out
of bounds` error from Rust that doesn’t clearly explain the problem. It would
be best if all the error-handling code were in one place so future maintainers
had only one place to consult the code if the error-handling logic needed to
change. Having all the error-handling code in one place will also ensure that
we’re printing messages that will be meaningful to our end users.
Fourth, we use `expect` to handle an error, and if the user runs our program
without specifying enough arguments, they’ll get an `index out of bounds` error
from Rust that doesn’t clearly explain the problem. It would be best if all the
error-handling code were in one place so future maintainers had only one place
to consult the code if the error-handling logic needed to change. Having all the
error-handling code in one place will also ensure that we’re printing messages
that will be meaningful to our end users.
Let’s address these four problems by refactoring our project.