Focus on Software, not Code (EN)

Some developers tend to focus too much on code, losing sight of the most important thing, which is working software. This talk shows the difference between code vs running software and shows the issues with focusing on the former.

Transcript

1. Focus on Software, not Code Enrique Zamudio “chochos”
2. Who am I? Programmer since 1994 Java Champion since 2015 javaMéxico, JVMMX Principal Engineer @ Bitso
3. “Writing Software”
5. Code → Software One is not better than the other Software can’t exist without code Code without software is pointless
8. What is code?
10. positiveIntegers .parallelStream() .filter( i -> isPrime(i)) .limit(1_000) .sorted() .forEach(System.out::println);
11. Code is a means of communication among the people working on a piece of software.
12. What is Software?
14. positiveIntegers .parallelStream() .filter( i -> isPrime(i)) .limit(1_000) .sorted() .forEach(System.out::println);
15. Code → Theory Software → Practice
16. "In theory, there is no difference between practice and theory. In practice, there is."
17. Code-Oriented vs Software-Oriented
18. Code Review positiveIntegers .parallelStream() .filter( n -> isPrime(n)) .limit(1_000) .sorted() .forEach(System.out::println);
19. Code Review positiveIntegers .parallelStream() .filter( n -> isPrime(n)) .limit(1_000) .sorted() .forEach(System.out::println);
20. Code Review positiveIntegers .parallelStream() .filter( n -> isPrime(n)) .limit(1_000) .sorted() .forEach(System.out::println);
21. Code Review //increment the variable i += length; //read the rows var rows = model.fetchRows(i) //filter in memory due to //data conversion //(db returns strings) .stream().filter(this::validate) .toList;
22. Code Review //increment the variable i += length; //read the rows var rows = model.fetchRows(i) //filter in memory due to //data conversion //(db returns strings) .stream().filter(this::validate) .toList;
23. Code Review //increment the variable i += length; //read the rows var rows = model.fetchRows(i) //filter in memory due to //data conversion //(db returns strings) .stream().filter(this::validate) .toList;
24. Code Review Checks for tests, Clarity, readability and modifiability, Considerations on dependencies, Test coverage, Cognitive complexity, Observability, Fault tolerance Argues about types of tests, Adherence to practices regardless of context, Cyclomatic complexity, Requests abstractions, premature optimization
25. Code Review Checks for tests, Clarity, readability and modifiability, Considerations on dependencies, Test coverage, Cognitive complexity, Observability, Fault tolerance Argues about types of tests, Adherence to practices regardless of context, Cyclomatic complexity, Requests abstractions, premature optimization
26. Code Review Checks for tests, Clarity, readability and modifiability, Considerations on dependencies, Test coverage, Cognitive complexity, Observability, Fault tolerance Argues about types of tests, Adherence to practices regardless of context, Cyclomatic complexity, Requests abstractions, premature optimization
27. Code Review Observability, Fault tolerance
28. Software Review Observability, Fault tolerance
29. Case 1 Case 2 Case 3
32. Software-Oriented Code-Oriented During a Release
33. Literature
34. Anyone can code. Not anyone can produce working software.
35. Thank you!