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Cover image for Code Smell 42 - Warnings/Strict Mode Off

Code Smell 42 - Warnings/Strict Mode Off

Maxi Contieri
Learn something new every day. - I am a senior software engineer working in industry, teaching and writing on software design, SOLID principles, DDD and TDD.
・1 min read

Compilers and warnings lights are there for help. Don't ignore them.

Problems

  • Missed Errors

  • Ripple Effect

  • Fail Fast

Solutions

  1. Enable all warnings

  2. Enable preconditions and assertions in production.

  3. Fail fast

  4. Design by contract

Sample Code

Wrong

Right

Detection

Most languages have warning levels. We should turn most of them ON.

We should run linters to statically analyze our code for potential problems.

Tags

  • Fail Fast

Conclusion

If we ignore warnings and code moves on sooner or later it will fail.

If the software fails later it will be very difficult for us to find root cause.

Defect will likely be near first warning and far away from the crash.

If we follow the Broken Windows Theory, we should not tolerate any warnings, so a new issue will not pass unnoticed on a sea of tolerated warnings.

Relations

More info

Fail Fast

Strict Javascript

Credits

Photo by Noah Dominic Silvio on Unsplash


One man's crappy software is another man's full time job.

Jessica Gaston

Discussion (3)

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darkwiiplayer profile image
DarkWiiPlayer

Relevant section in one of my favourite programming books :D