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JavaScript is Real Code
- 1. JavaScript is Real Code Len Smith @ignu http://iggy.nu len.smith@live.com
- 10. “JavaScript is the only language I’m aware of where people feel they don’t have to learn it before they start using it” -Douglas Crockford
- 11. Dynamic
- 12. Loose Typing
- 13. number boolean string undefined object Regex Date Array
- 14. “Lisp in C’s clothing”
- 15. function() {}
- 17. SOLID?
- 19. Single Responsibility Principle Open Closed Principle Liskov Substitution Principle Interface Segregation Principle Dependency Inversion Principle
- 21. JavaScript Isn’t Shouldn’t be OO
- 22. Rules of Simple Design
- 23. Rules of Simple Design • Passes Tests
- 24. Rules of Simple Design •Passes Tests • Removes Duplication
- 25. Rules of Simple Design •Passes Tests • Removes Duplication • Increases Clarity
- 26. Rules of Simple Design •Passes Tests • Removes Duplication • Increases Clarity • Is Small
- 27. Rules of Simple Design • Removes Duplication • Increases Clarity
- 28. Rules of Simple Design • DRY • Clear
- 29. “The main thing that distinguishes legacy code from non-legacy code is tests, or rather a lack of tests.” - Michael Feathers
- 30. Safety
- 35. Documentation
- 38. Design
- 39. “The act of writing a unit test is more an act of design than of verification” - “Uncle” Bob Martin
- 41. RED Your test should fail.
- 42. Write just enough code to make it pass.
- 43. RED GREEN
- 45. Refactor to remove duplication and Improve clarity.
- 46. RED GREEN REFACTOR
- 47. RED GREEN REFACTOR
- 49. closures
- 50. closures are expressions, usually functions, which can work with variables set within a certian context
- 51. prototype
- 54. Writing Views Twice usernameDiv.text(tweet.username) <div id=”username”> <%=Model.UserName%> </div>
- 55. “The first rule of functions is that they should be small. The second rule of functions is that they should be smaller than that. “- Bob Martin, Clean Code
- 60. • var
- 62. •var • small functions • isolate selectors/dom
- 63. •var • small functions • isolate selectors/dom • beware closures
- 64. •var • small functions • isolate selectors/dom • beware closures • keep views dry
- 65. •var • small functions • isolate selectors/dom • beware closures • keep views dry • test! (and ci)
- 67. Questions? Len Smith @ignu http://iggy.nu len.smith@live.com
Hinweis der Redaktion
- Who Uses JS? What do you use it for? ** RIGHT, THE WE...
- MVC vs Controls. Flash vs. Smartphones... Decade and a half and gaining momentum. *** But JavaScript&#x2019;s expanding outside of the web...
- Document DB. Querying, Storage all in JS. node.js: Async. Really, really, really fast. ** PICTURE ON TWITTERS
- JavaScript the Bad Parts is obviously a large book. Good Parts only JS book I recommend ** WRITTEN BY
- Godfather of JavaScript. JSON. JSLint. JSMin. *** TALKS ABOUT WHY JS MAKES US FEEL LIKE
- most misunderstood language in the world. *** What we really hate...
- Not Dom Delouise. But he doesn&#x2019;t help anything. *** THE DOM
- *** The other problem is our fault
- TOY Clojure/Scala ***
- Why don&#x2019;t we learn it? Marketing: Java - a lie Alerts ** So.... what makes JS different?
- DEMO *** JavaScript is Powerful, Dangerous.
- Stan Lee taught us *** So how do we write maintainable code
- Robert C. Martin
- List of Principles Some Important... some not. *** BUT WHY?
- If I lost some of you on what SOLID is, don&#x2019;t worry much. Just remember, DRY AND CLEAR. Words are so simple but so difficult to achieve. What practice can force us down this path.
- DRY: If my function does A and B and C... B Somewhere else CLEAR: can name it B
- If I can extend it with out modifying I&#x2019;m probably clear. And I stay dry by not having this new functions concerns bleeding into things I&#x2019;m extending
- CLEAR: Animal that can walk sometimes but not in these cases
- Clear how to use this
- CLEAR: Animal that can walk sometimes but not in these cases
- Clear on what I need. Testing.
- In Web Applications,we typically finad
- Manual Testing is Immoral. Unit Tests should be %100. Crisis of Faith with dynamic languages and Cross Testing and Integration Tests. Situational Tests should just test all of these connections.
- Mouthfull. Using JavaScript correctly, using TDD. Synergistic.
- Who Uses JS? What do you use it for? ** RIGHT, THE WE...