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Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
Around "Hello World" in 30 Days
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Around "Hello World" in 30 Days

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  • reduce, accumulate, compress or inject
    higher-order functions that iterate an arbitrary function over a data structure in some order and build up a return value
  • reduce, accumulate, compress or inject
    higher-order functions that iterate an arbitrary function over a data structure in some order and build up a return value
















  • The desire to get better and better at something
    Not the desire to BE GOOD at something

  • Hungary
    optimum experience
    Time passes quickly
    self-consciousness disolves
    activity not too easy, not too hard
  • 7 weeks of basic training at west point before starting
    1 in 20 drops out
    not strength, athleticism, intelligence, or leadership ability
    “perseverance and passion for long-term goals”
  • Carol Dweck
    People who view intelligence as fluid do much better
  • Carol Dweck
    You worked so hard vs. you are so smart























  • Transcript

    • 1. Around Hello World in 30 Days David Eisinger // @deisinger DevNation Chicago // May 15, 2010
    • 2. Around “Hello World” in 30 Days 1. The Motivation 2. The Methods 3. The Mindset 4. The Moral
    • 3. Around “Hello World” in 30 Days 1. The Motivation About Me
    • 4. Around “Hello World” in 30 Days 1. The Motivation About Me
    • 5. Around “Hello World” in 30 Days 1. The Motivation About Me
    • 6. Around “Hello World” in 30 Days 1. The Motivation About Me
    • 7. Around “Hello World” in 30 Days 1. The Motivation About Me
    • 8. Around “Hello World” in 30 Days 1. The Motivation About Me
    • 9. Around “Hello World” in 30 Days 1. The Motivation About Me
    • 10. Around “Hello World” in 30 Days 1. The Motivation About Me
    • 11. Around “Hello World” in 30 Days 1. The Motivation Falling behind
    • 12. Around “Hello World” in 30 Days 1. The Motivation Falling behind
    • 13. Around “Hello World” in 30 Days 1. The Motivation O NOES Falling behind
    • 14. Around “Hello World” in 30 Days 1. The Motivation Not on the job.
    • 15. Around “Hello World” in 30 Days 1. The Motivation Keeping Up
    • 16. Around “Hello World” in 30 Days 1. The Motivation The Great Demotivator
    • 17. Around “Hello World” in 30 Days 1. The Motivation I love this town.
    • 18. Around “Hello World” in 30 Days 1. The Motivation 2. The Methods 3. The Mindset 4. The Moral
    • 19. Around “Hello World” in 30 Days 2. The Method The Project
    • 20. Around “Hello World” in 30 Days 2. The Method Making the list
    • 21. Around “Hello World” in 30 Days 2. The Method The List Cassandra 10. HTML5 20. ooc 1. Chrome Extensions 11. Io 21. Redis 2. Clojure 12. Jekyll 22. Riak 3. CoffeeScript 13. jQTouch 23. Scala 4. CouchDB 14. Lua 24. Scheme 5. CSS3 15. MacRuby 25. Sinatra 6. Django 16. Mercurial 26. Squeak 7. Erlang 17. MongoDB 27. Treetop 8. Go 18. Node.js 28. VIM 9. Haskell 19. OCaml 29. ZSH
    • 22. Around “Hello World” in 30 Days 2. The Method Thirteen Languages 1. Cassandra 11. HTML5 21. ooc 2. Chrome Extensions 12. Io 22. Redis 3. Clojure 13. Jekyll 23. Riak 4. CoffeeScript 14. jQTouch 24. Scala 5. CouchDB 15. Lua 25. Scheme 6. CSS3 16. MacRuby 26. Sinatra 7. Django 17. Mercurial 27. Squeak 8. Erlang 18. MongoDB 28. Treetop 9. Go 19. Node.js 29. VIM 10. Haskell 20. OCaml 30. ZSH
    • 23. Around “Hello World” in 30 Days 2. The Method Thirteen Languages 1. Cassandra 11. HTML5 21. ooc 2. Chrome Extensions 12. Io 22. Redis 3. Clojure x 13. Jekyll 23. Riak 4. CoffeeScript 14. jQTouch 24. Scala 5. CouchDB 15. Lua 25. Scheme x 6. CSS3 16. MacRuby 26. Sinatra 7. Django 17. Mercurial 27. Squeak 8. Erlang x 18. MongoDB 28. Treetop 9. Go 19. Node.js 29. VIM 10. Haskell x 20. OCaml x 30. ZSH
    • 24. Around “Hello World” in 30 Days 2. The Method Five Datastores 1. Cassandra 11. HTML5 21. ooc 2. Chrome Extensions 12. Io 22. Redis 3. Clojure 13. Jekyll 23. Riak 4. CoffeeScript 14. jQTouch 24. Scala 5. CouchDB 15. Lua 25. Scheme 6. CSS3 16. MacRuby 26. Sinatra 7. Django 17. Mercurial 27. Squeak 8. Erlang 18. MongoDB 28. Treetop 9. Go 19. Node.js 29. VIM 10. Haskell 20. OCaml 30. ZSH
    • 25. Around “Hello World” in 30 Days 2. The Method Five Web Frameworks 1. Cassandra 11. HTML5 21. ooc 2. Chrome Extensions 12. Io 22. Redis 3. Clojure 13. Jekyll 23. Riak 4. CoffeeScript 14. jQTouch 24. Scala 5. CouchDB 15. Lua 25. Scheme 6. CSS3 16. MacRuby 26. Sinatra 7. Django 17. Mercurial 27. Squeak 8. Erlang 18. MongoDB 28. Treetop 9. Go 19. Node.js 29. VIM 10. Haskell 20. OCaml 30. ZSH
    • 26. Around “Hello World” in 30 Days 2. The Method Seven Others 1. Cassandra 11. HTML5 21. ooc 2. Chrome Extensions 12. Io 22. Redis 3. Clojure 13. Jekyll 23. Riak 4. CoffeeScript 14. jQTouch 24. Scala 5. CouchDB 15. Lua 25. Scheme 6. CSS3 16. MacRuby 26. Sinatra 7. Django 17. Mercurial 27. Squeak 8. Erlang 18. MongoDB 28. Treetop 9. Go 19. Node.js 29. VIM 10. Haskell 20. OCaml 30. ZSH
    • 27. Around “Hello World” in 30 Days 2. The Method The Hour
    • 28. Around “Hello World” in 30 Days 2. The Method The Buddy System
    • 29. Around “Hello World” in 30 Days 2. The Method The Fold
    • 30. Around “Hello World” in 30 Days 2. The Method The Fold
    • 31. Around “Hello World” in 30 Days 2. The Method The Fold
    • 32. Around “Hello World” in 30 Days 2. The Method WTF’s a fold? # sum an array of numbers [1, 2, 3, 4, 5].inject {|sum, i| sum + i } # => 15
    • 33. Around “Hello World” in 30 Days 2. The Method WTF’s a fold? # collect an array of squares [1, 2, 3, 4, 5].inject([]) do |coll, i| coll + [i * i] end # => [1, 4, 9, 16, 25]
    • 34. Around “Hello World” in 30 Days 2. The Method C0ffeeScript fold: (values, lambda, init...) -> if init[0]? result = init[0] else result = values[0] values = values[1..values.length] for value in values result = lambda(result, value) result
    • 35. Around “Hello World” in 30 Days 2. The Method C0ffeeScript sum: (values...) -> fold values, (a, b) -> a + b x: sum 1, 2, 3, 4, 5 // x == 15
    • 36. Around “Hello World” in 30 Days 2. The Method C0ffeeScript (function(){ var fold; var __slice = Array.prototype.slice; fold = function fold(values, lambda) { var _a, _b, _c, _d, init, result, value; init = __slice.call(arguments, 2, arguments.length - 0); if ((typeof (_a = init[0]) !== "undefined" && _a !== null)) { result = init[0]; } else { result = values[0]; values = values.slice(1, values.length + 1); } ...
    • 37. Around “Hello World” in 30 Days 2. The Method Lua function fold(values, lambda, init) index, value = next(values, nil) if init then result = init else result = value index, value = next(values, index) end
    • 38. Around “Hello World” in 30 Days 2. The Method Lua
    • 39. Around “Hello World” in 30 Days 2. The Method Lua while index do result = lambda(result, value) index, value = next(values, index) end return result end
    • 40. Around “Hello World” in 30 Days 2. The Method Lua function sum(values) return fold(values, function (a, b) return a + b end) end -- sum the set of numbers sum({1, 2, 3, 4})
    • 41. Around “Hello World” in 30 Days 2. The Method Lua function map(values, lambda) return fold(values, function (c, i) c[i] = lambda(i) return c end, {}) end -- get the list of squares map({1, 2, 3, 4}, function (x) return x * x end)
    • 42. Around “Hello World” in 30 Days 2. The Method Scheme (define fold (lambda (arr f result) (cond ((null? arr) result) (else (fold (cdr arr) f (f result (car arr)))))))
    • 43. Around “Hello World” in 30 Days 2. The Method Scheme (define fold (lambda (arr f . result) (cond ((and (null? arr) (null? result) `())) ((null? arr) (car result)) ((null? result) (fold (cdr arr) f (car arr))) (else (fold (cdr arr) f (f (car result) (car arr)))))))
    • 44. Around “Hello World” in 30 Days 2. The Method Scheme > (fold `(1 2 3 4) (lambda (x y) (+ x y))) 10 > (fold `(1 2 3 4) (lambda (squares x) (cons (* x x) squares)) `()) (16 9 4 1)
    • 45. Around “Hello World” in 30 Days 2. The Method Erlang -module(fold). -export([fold/2, fold/3]). fold([First | Rest], Fun, Result) -> fold(Rest, Fun, Fun(Result, First)); fold([], Fun, Result) -> Result.
    • 46. Around “Hello World” in 30 Days 2. The Method Erlang
    • 47. Around “Hello World” in 30 Days 2. The Method Erlang fold([First | Rest], Fun) -> fold(Rest, Fun, First); fold([], Fun) -> []. % > fold:fold([1,2,3], fun(Sum, Item) -> Sum + Item end). % 6
    • 48. Around “Hello World” in 30 Days 2. The Method The Blog
    • 49. Around “Hello World” in 30 Days 1. The Motivation 2. The Methods 3. The Mindset 4. The Moral
    • 50. Around “Hello World” in 30 Days 3. The Mindset Mastery
    • 51. Around “Hello World” in 30 Days 3. The Mindset Flow
    • 52. Around “Hello World” in 30 Days 3. The Mindset
    • 53. Around “Hello World” in 30 Days 3. The Mindset Grit
    • 54. Around “Hello World” in 30 Days 3. The Mindset Intelligence (Incremental vs. Entity)
    • 55. Around “Hello World” in 30 Days 3. The Mindset Hard Work
    • 56. Around “Hello World” in 30 Days 1. The Motivation 2. The Methods 3. The Mindset 4. The Moral
    • 57. Around “Hello World” in 30 Days 4. The Moral Biggest Surprise:
    • 58. Around “Hello World” in 30 Days 4. The Moral Biggest Surprise: CoffeeScript
    • 59. Around “Hello World” in 30 Days 4. The Moral Biggest Disappointment:
    • 60. Around “Hello World” in 30 Days 4. The Moral Biggest Disappointment: CouchDB
    • 61. Around “Hello World” in 30 Days 4. The Moral Biggest Success:
    • 62. Around “Hello World” in 30 Days 4. The Moral Biggest Success: Erlang
    • 63. Around “Hello World” in 30 Days 4. The Moral Most Value:
    • 64. Around “Hello World” in 30 Days 4. The Moral Most Value: Redis
    • 65. Around “Hello World” in 30 Days 4. The Moral Best Docs:
    • 66. Around “Hello World” in 30 Days 4. The Moral Best Docs: Sinatra
    • 67. Around “Hello World” in 30 Days 4. The Moral
    • 68. Around “Hello World” in 30 Days 4. The Moral Most Bewildering:
    • 69. Around “Hello World” in 30 Days 4. The Moral Most Bewildering: Cassandra
    • 70. Around “Hello World” in 30 Days 4. The Moral Most Fun:
    • 71. Around “Hello World” in 30 Days 4. The Moral Most Fun: Scheme
    • 72. Around “Hello World” in 30 Days 4. The Moral Start Small
    • 73. Around “Hello World” in 30 Days 4. The Moral Start Now
    • 74. Around “Hello World” in 30 Days 4. The Moral What was missing?
    • 75. Around “Hello World” in 30 Days 4. The Moral What was missing?
    • 76. Around “Hello World” in 30 Days 4. The Moral What was missing?
    • 77. Around “Hello World” in 30 Days 4. The Moral What was missing?
    • 78. Around “Hello World” in 30 Days 4. The Moral What was missing?
    • 79. Around “Hello World” in 30 Days 4. The Moral What was missing?
    • 80. Around “Hello World” in 30 Days 4. The Moral What was missing? Strongly-typed languages are hard.
    • 81. Around “Hello World” in 30 Days 4. The Moral Make (& Take) The Time
    • 82. Around “Hello World” in 30 Days 4. The Moral Stick It Out
    • 83. Around “Hello World” in 30 Days 4. The Moral Cut & Run
    • 84. Around “Hello World” in 30 Days 4. The Moral Share Your Experiences
    • 85. Around “Hello World” in 30 Days 4. The Moral Make Programming Play
    • 86. Around “Hello World” in 30 Days Thanks! http://speakerrate.com/talks/3249 @deisinger

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