Software Craftsmanship

A talk I did for about 200 Unit4 developers on june 6th about software craftsmanship and how we do that at Kabisa.

Note: I'm available for talks.

Transcript

2. Agile Web Applicatie Ontwikkeling Harm de Laat
3. Agile Web Applicatie Ontwikkeling Harm de Laat
5. Ariejan de Vroom @ariejan
6. Let’s talk about code!
7. function get_category_by_path( $category_path, $full_match = true, $output = OBJECT ) { ! $category_path = rawurlencode( urldecode( $category_path ) ); ! $category_path = str_replace( '%2F', '/', $category_path ); ! $category_path = str_replace( '%20', ' ', $category_path ); ! $category_paths = '/' . trim( $category_path, '/' ); ! $leaf_path = sanitize_title( basename( $category_paths ) ); ! $category_paths = explode( '/', $category_paths ); ! $full_path = ''; ! foreach ( (array) $category_paths as $pathdir ) ! ! $full_path .= ( $pathdir != '' ? '/' : '' ) . sanitize_title( $pathdir ); ! $categories = get_terms( 'category', array('get' => 'all', 'slug' => $leaf_path) ); ! if ( empty( $categories ) ) ! ! return null; ! foreach ( $categories as $category ) { ! ! $path = '/' . $leaf_path; ! ! $curcategory = $category; ! ! while ( ( $curcategory->parent != 0 ) && ( $curcategory->parent != $curcategory->term_id ) ) { ! ! ! $curcategory = get_term( $curcategory->parent, 'category' ); ! ! ! if ( is_wp_error( $curcategory ) ) ! ! ! ! return $curcategory; ! ! ! $path = '/' . $curcategory->slug . $path; ! ! } ! ! if ( $path == $full_path ) ! ! ! return get_category( $category->term_id, $output ); ! } ! // If full matching is not required, return the first cat that matches the leaf. ! if ( ! $full_match ) ! ! return get_category( $categories[0]->term_id, $output ); ! return null; } — Wordpress
8. class Issue < ActiveRecord::Base def self.search query where("title like :query", :query => "%#{query}%") end def today? Date.today == created_at.to_date end end — Gitlab
9. How do you recognize ugly code?
10. Code Smells
11. •duplicate code •long methods •large classes •too many parameters Code Smells
12. •feature envy •inappropriate intimacy •contrived complexity •über-callback Code Smells
13. Why are you still writing ugly code?
14. Ugly Code is... •... hard to maintain •... even harder to debug •... impossible to change •... it does not make you happy
15. Companies have gone bankrupt because of ugly code.
16. At Kabisa we believe all code should be BEAUTIFUL
17. Find a master to learn from.
18. Master in painting happy little trees. Bob Ross
19. Painting beautiful happy little trees requires practice.
20. Writing clean code requires practice.
21. Code Dojo
22. 1. Practice. 2. Get feedback. 3. Throw away your code. 4.Repeat.
23. Hello? Does this work?
24. Test Driven Development vs. Behaviour Driven Development
25. Your tests use your API
26. Your tests define your API
27. Workflow •Write one test. •See that test fail. •Write the most simple solution to make the tests pass. •Refactor.
28. Throw away your code!
29. How do you guys still make money?!
30. Clean Code allows for easy maintenance
31. Clean Code encourages change
32. The test suite proves everything works.
33. We’re learning continuously
34. Happy Developers
35. THANK YOU!
36. http://kabisa.nl ariejan@kabisa.nl Ariejan de Vroom @ariejan