The document discusses the history of computer science, including influential figures like Charles Babbage, Alan Turing, John von Neumann, and Douglas Engelbart. It also covers topics like object-oriented programming concepts, prime number generation in Ruby, and the importance of learning and sharing knowledge in the field of computer science. Examples of code are provided to illustrate various programming concepts.

1. Aprendendo a
Aprender
Fabio Akita
@akitaonrails

3. ?

4. +Fácil

5. +Elegante

6. Johannes Vermeer

7. Johannes Vermeer

8. Johannes Vermeer

9. Johannes Vermeer

14. Ciência da
Computação

18. 11
3

19. 11
3
5
6

20. 11
3
5
6
2
12

21. 11
3
5
6
2
12
1
24

22. 11
3
5
6
2
12
1
24
3 + 6 + 24 =
33

24. 57
5

25. 57
5
28
10

26. 57
5
28
10
14
20

27. 57
5
28
10
14
20
7
40

28. 57
5
28
10
14
20
7
40
3
80

29. 57
5
28
10
14
20
7
40
3
80
1
160

30. 57
5
28
10
14
20
7
40
3
80
1
160
5+40+80+160=
285

32. Longinus

33. Charles Babbage (1791-1871)

35. John von Neumann (1903 – 1957)

36. Alan Mathison Turing (1912 – 1954)

38. “The Imitation Game" (2014 - Benedict Cumberbatch)

40. people = 20
count = 0
people.times do |person_a|
people.times do |person_b|
count += 1 if person_b > person_a
end
end
puts count # => 190

41. people = 20
count = 0
people.times do |person_a|
people.times do |person_b|
count += 1 if person_b > person_a
end
end
puts count # => 190

42. people = 20
count = 0
people.times do |person_a|
people.times do |person_b|
count += 1 if person_b > person_a
end
end
puts count # => 190

43. people = 20
puts (people * (people - 1) / 2) # => 190

44. require 'benchmark'
people = 10_000
Benchmark.bm do |x|
x.report do
count = 0
people.times do |person_a|
people.times do |person_b|
count += 1 if person_b > person_a
end
end
puts count
end
x.report do
puts (people * (people - 1) / 2)
end
end

45. require 'benchmark'
people = 10_000
Benchmark.bm do |x|
x.report do
count = 0
people.times do |person_a|
people.times do |person_b|
count += 1 if person_b > person_a
end
end
puts count
end
x.report do
puts (people * (people - 1) / 2)
end
end

46. require 'benchmark'
people = 10_000
Benchmark.bm do |x|
x.report do
count = 0
people.times do |person_a|
people.times do |person_b|
count += 1 if person_b > person_a
end
end
puts count
end
x.report do
puts (people * (people - 1) / 2)
end
end

47. require 'benchmark'
people = 10_000
Benchmark.bm do |x|
x.report do
count = 0
people.times do |person_a|
people.times do |person_b|
count += 1 if person_b > person_a
end
end
puts count
end
x.report do
puts (people * (people - 1) / 2)
end
end

48. user
190
0.000000
190
0.000000
system
total
real
0.000000
0.000000 (
0.000043)
0.000000
0.000000 (
0.000008)

49. user
49995000
6.310000
49995000
0.000000
system
total
real
0.000000
6.310000 (
6.354882)
0.000000
0.000000 (
0.000011)

50. “The Social Network" (2010)

63. http://u.akita.ws/naousesqllike

71. “I made up the term
‘object-oriented’,
and I can tell you
I didn’t have
C++ in mind”
- Alan Kay

72. soma = 1 + 2

73. soma = 1 + 2
soma = 1.+(2)

74. soma = 1 + 2
soma = 1.+(2)
soma = 1.send(:+, 2)

76. Ole-Johan Dahl e Kristen Nygaard

77. require 'prime'
gerador_de_primos = Fiber.new do
numero = 1
loop do
Fiber.yield(numero) if numero.prime?
numero += 1
end
end

78. require 'prime'
gerador_de_primos = Fiber.new do
numero = 1
loop do
Fiber.yield(numero) if numero.prime?
numero += 1
end
end
gerador_de_primos.resume
=> 2

79. require 'prime'
gerador_de_primos = Fiber.new do
numero = 1
loop do
Fiber.yield(numero) if numero.prime?
numero += 1
end
end
gerador_de_primos.resume
=> 2
gerador_de_primos.resume
=> 3

80. require 'prime'
gerador_de_primos = Fiber.new do
numero = 1
loop do
Fiber.yield(numero) if numero.prime?
numero += 1
end
end
gerador_de_primos.resume
=> 2
gerador_de_primos.resume
=> 3
gerador_de_primos.resume
=> 5

81. Gordon Moore - Intel co-founder

84. Gordon Bell - DEC early employee

90. Vaticano 2005

91. Vaticano 2013

92. Vaticano 2005

93. Vaticano 2013

103. Richard Stallman

104. James Gosling
Richard Stallman

105. James Gosling
Richard Stallman

107. ?

108. +Promíscuos

114. +Sádicos

119. +Críticos

125. www.codeminer42.com

126. www.codeminer42.com

127. www.codeminer42.com

128. www.codeminer42.com

129. www.codeminer42.com

130. www.codeminer42.com

131. www.codeminer42.com

132. www.codeminer42.com

133. www.codeminer42.com

134. www.codeminer42.com

135. www.codeminer42.com

136. www.codeminer42.com

137. Iniciando

144. Douglas Engelbart - 1925 a 2/Jul/2013

145. Douglas Engelbart - 1925 a 2/Jul/2013

147. Bons artistas Copiam
Grandes artistas Roubam

148. Pablo Picasso

149. Ciência da
Computação

150. OBRIGADO!
slideshare.net/akitaonrails
codeminer42.com
@akitaonrails