Some words of wisdom for the developer

Short presentation I've given at the London Java Community even, during the JAX London 2013 conference.

Transcript

1. Little words of
   wisdom for the
   developer
2. Guillaume Laforge @glaforge http://glaforge.appspot.com http://gplus.to/glaforge +
4. Have Fun!
5. “ million 
 downloads
 per year 1.7
7. Great for scripting
8. Great for scripting Fit for Domain- Specific Languages
9. Great for scripting Fit for Domain- Specific Languages Most seamless integration & interoperability wih java!
12. Yup, we’re all using Groovy!
13. “There are three types of people on earth: ones make things happen, ones watch things happen, 
 ones wonder what happened — Jim Lovell
 Appollo 13 astraunaut
14. Contribute to Open Source
15. Contribute to Open Source Best carreer move for me!
16. Contribute to Open Source Best carreer move for me! Work with great developers
17. Contribute to Open Source Best carreer move for me! Travel and meet great people Work with great developers
18. Contribute to Open Source Best carreer move for me! Travel and meet great people Work with great developers A job that doesn’t feel like a job
19. Contribute to Open Source Best carreer move for me! Travel and meet great people Work with great developers A job that doesn’t feel like a job You’ll learn a lot
21. Speak publicly
22. Speak publicly Get more confident in your skills, your knowledge, yourself…
24. Always be nice & helpful
25. Always be nice & helpful You get the community you deserve
26. “ Software 
 is eating 
 the world — Marc Andreessen Netscape fame Venture Capitalist
28. Software disrupted: retail, book, newspaper, music industries….
29. Software disrupted: retail, book, newspaper, music industries…. Need to reinvent yourself!
31. Software offers us a lot of opportunities
32. Software offers us a lot of opportunities Deploy in the cloud, spread the word on social networks…
33. Software offers us a lot of opportunities Deploy in the cloud, spread the word on social networks… Create the next disruption!
34. “ Don’t worry about what anybody 
 else is going to do. The best 
 way to predict the future 
 is to invent it. — Alan Kay Smalltalk co-inventor
36. Be an actor!
38. Your best asset is you!
39. Your best asset is you! Always invest in yourself!
40. Think out of the box
41. “ Nothing is black or white. 
 Life is never either / or. 
 Nothing is ever as straightforward as it appears — Nelson Mandella
42. VI EMACS
43. STATIC DYNAMIC
45. Groovy adds static typing and static compilation
46. Groovy adds static typing and static compilation C# adds a dynamic keyword, and Scala a dynamic trait
47. Groovy adds static typing and static compilation C# adds a dynamic keyword, and Scala a dynamic trait Everybody claims to be functional
48. A blended world of languages… Compiled Static Imperative Object oriented Single dispatch Strong typing Interpreted Dynamic Functional Prototype based Multiple dispatch Weak typing
49. A blended world of languages… Compiled Static Imperative Object oriented Single dispatch Strong typing Interpreted Dynamic Functional Prototype based Multiple dispatch Weak typing Not just 0 or 1
50. A blended world of languages… Compiled Static Imperative Object oriented Single dispatch Strong typing Interpreted Dynamic Functional Prototype based Multiple dispatch Weak typing Not just 0 or 1 A float between 0 and 1
51. A blended world of languages… Compiled Static Imperative Object oriented Single dispatch Strong typing Interpreted Dynamic Functional Prototype based Multiple dispatch Weak typing Not just 0 or 1 A float between 0 and 1 Even a vector of floats!
52. A blended world of languages… Compiled Static Imperative Object oriented Single dispatch Strong typing Interpreted Dynamic Functional Prototype based Multiple dispatch Weak typing Not just 0 or 1 A float between 0 and 1 Even a vector of floats! Several attributes at the same time
53. “Programs must be written for people to read, and 
 only incidentally for 
 machines to execute — Abelson & Sussman
 Structure & Interpretation 
 of Computer Programs
54. Readability matters
55. Readability matters Conciseness shouldn’t compromise readability
56. Readability matters Conciseness shouldn’t compromise readability 80 % reading, 20 % writing code
57. Ascii art programming… (0:/o) (_*_)
58. Ascii art programming… (0:/o) (_*_) (0:/o) (_*_)
59. Ascii art programming… (0:/o) (_*_)
60. Ascii art programming… (0:/o) (_*_) (0:/o) (_*_)
61. Ascii art programming… (0:/o) (_*_)
62. Ascii art programming… (0:/o) (_*_) (0:/o) (_*_)
63. Ascii art programming… (0:/o) (_*_)
64. Ascii art programming… (0:/o) (_*_)
65. “ Any sufficiently 
 advanced technology 
 is indistinguishable 
 from magic — Arthur C. Clarke
67. Use magic with caution
68. Use magic with caution Too many « implicits » or « conventions » can be harmful
69. Use magic with caution Too many « implicits » or « conventions » can be harmful Often « explicit » is more obvious
71. Reinventing the wheel isn’t always bad!
72. Reinventing the wheel isn’t always bad! What about a new language?
73. Reinventing the wheel isn’t always bad! New languages mature the field What about a new language?
74. Reinventing the wheel isn’t always bad! New languages mature the field Design patterns become language features What about a new language?
75. Reinventing the wheel isn’t always bad! New languages mature the field Design patterns become language features We’d be still developing in ASM or Cobol… What about a new language?
76. “Perfection is achieved not when there is nothing more to add, but when there is nothing left to take away — Antoine de Saint-Exupéry
78. Keep It Simple Stupid
79. Keep It Simple Stupid Don’t over-engineer too much
80. Keep It Simple Stupid Don’t over-engineer too much You Ain’t Gonna Need It
81. Summary — about yourself • Contribute to Open Source • You get the community you deserve ! • Be an actor! • Speak publicly • Create the next disruption with software ! • Your best asset is you • Invest in yourself • Think out of the box • Reinvent yourself
82. Summary — about your craft ! • Be cautious with magic ! • Readability matters ! • Keep things simple ! • Don’t be afraid of reinventing the wheel
83. Summary — and… ! • Have fun!
84. “ We must be very careful when giving advice 
 to younger people: sometimes 
 they follow it — Edgar Dijkstra
86. Thanks for 
 your attention!