It's a trap! Abstraction or Coincidence

"Davanti a due problemi all'apparenza simili come agisci? Cerchi subito di far convergere le soluzioni o prima ti poni la domanda se la similitudine è un'astrazione o una coincidenza?"
È da questa domanda che nasce il talk. A partire dalla definizione di astrazione, come metodo logico per l'isolamento dei contesti rilevanti da quelli accidentali, entreremo nel merito delle trappole che l'erronea identificazione di questi può far scattare. L'intenzione è quella di far riflettere su alcuni esempi pratici e fornire gli strumenti per generare nuove opportunità.
Gli argomenti trattati non prevedono conoscenza pregressa, e il talk si rivolge sia a figure di coordinamento (SM, PO, DM, PM) sia a figure prettamente tecniche.
Ed è proprio a partire da questo dualismo che è stata creata l'intera struttura della presentazione, con gli obiettivi di far emergere i diversi punti di vista e facilitare la collaborazione tra le parti raggiungendo risultati eccellenti.

Transcript

1. IT’S A TRAP! ANDREA DE MARCO
2. Agile Software Craftsman ANDREA DE MARCO IT’S A TRAP!
3. — Anonymous PO IT’S EXACTLY LIKE THIS! BUT… ” “
4. — Anonymous Farmer SE A ‘NA CARIOL’ CI MITT’ N’ANTENN, T Z’ARRUVIN E MANGHE SE SENT’.* ” “ (*) if you put an antenna on a wheelbarrow, it will ruin and you will not hear anything.
5. • COPY/PASTE • GENERALIZATION • COMPOSITION
6. DO NOT REPEAT YOURSELF
7. — Andy Hunt and Dave Thomas EVERY PIECE OF KNOWLEDGE MUST HAVE A SINGLE, UNAMBIGUOUS, AUTHORITATIVE REPRESENTATION WITHIN A SYSTEM. ” “
8. PRINT THESE THINGS, PLEASE! I'VE GOT 2 RED FISHES. I'VE GOT 4 RED DISHES.
9. – John V. Guttag THE ESSENCE OF ABSTRACTIONS IS PRESERVING INFORMATION THAT IS RELEVANT IN A GIVEN CONTEXT, AND FORGETTING INFORMATION THAT IS IRRELEVANT IN THAT CONTEXT. ” “
10. — Alfred Korzybski THE MAP IS NOT THE TERRITORY. ” “
11. WHAT WE HAVE IN OUR HEADS IS NOT THE REAL WORLD, BUT A MODEL OF THE WORLD
12. BABIES LOVE ANIMALS …WITHOUT EVER SEE THEM!
14. ABSTRACTION LADDER THE BOTTOM-UP HUMAN THOUGHT INSTANCE CLASS Car UISwitch SUPER CLASS Vehicle UIView INTERFACE Drivable Controllable ABSTRACT PROPERTY Travel Value Controller
15. ABSTRACTION, PLEASE!
16. ABSTRACTION, PLEASE! I'VE GOT 2 RED FISHES. I'VE GOT 4 RED DISHES. I'VE GOT N RED CISHES. (2, F) (4, D) 1<N<10
17. MORE ABSTRACTION, PLEASE!? I'VE GOT N RED CISHES. YOU'VE NO WHITE CATS! (I,YOU)’VE N=0?NO:N COLOR C…S(.,!) N=1?
18. MIND VERSUS EYES PATTERN AND ILLUSIONS
19. SOMETIMES IT’S JUST A COINCIDENCE THE LACK OF PATTERN IS CALLED RANDOMNESS
20. …AND BABIES? BABIES RECOGNIZE FACES BETTER THAN ADULTS
21. WELCOME BACK, OUR PROTOTYPE IS BROKEN. I'VE GOT 2 RED FISHES. I'VE GOT 4 RED DISHES. OUR CONTEXT IS PRINTABLE CHARACTERS, NOT THEIR RULES (SYNTAX) NOR THEIR MEANING (SEMANTICS)! YOU'VE NO WHITE CATS!
22. ABSTRACTION FOR DUMMIES COOL VS &$!#% CONSTRAINTS ABSTRACTION RULES
23. …ABOUT CONSTRAINTS THE IRON TRIANGLE
24. HIGH LEVEL ISSUES ABSTRACTION VS COMPOSITION • We don’t need other layers • We need modules
25. THE DEVIL IS IN THE DETAILS A PRACTICAL EXAMPLE
26. EPILOGUE • if I change “A” I want to change “B”? • how much the abstraction makes “A” complex? • how much the abstraction makes “B” solid? • did we deeply understand our constraints? • did we improve our quality and/or speed? FOR THE PROJECT AND FOR THE TEAM
27. KEEP IT
 SIMPLE, STUPID!