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Feb 20th, 2018
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  1. i, @i = 1, 1
  2.  
  3. def add_one(i)
  4. i =+1
  5. end
  6.  
  7. add_one(i)
  8. add_one(i)
  9. add_one(i)
  10.  
  11. puts i #=> 1
  12.  
  13. def add_one(i)
  14. @i = i+1
  15. end
  16.  
  17. add_one(@i)
  18. add_one(@i)
  19. add_one(@i)
  20.  
  21. puts @i #=> 4
  22.  
  23. i, @i = 1, 1
  24.  
  25. def add_one(i, &block)
  26. i = i+1
  27. yield i
  28. end
  29.  
  30. add_one(i) { |i| i = i*5 }
  31.  
  32. puts i #=> 10
  33.  
  34. add_one(@i) { |i| @i = i*5 }
  35.  
  36. puts @i #=> 10
  37.  
  38. i, @i = 1, 1
  39.  
  40. def add_one(i, &block)
  41. @i = i+1
  42. yield i
  43. end
  44.  
  45. add_one(i) { |i| i = i*5 }
  46.  
  47. puts i #=> 5
  48.  
  49. add_one(@i) { |i| @i = i*5 }
  50.  
  51. puts @i #=> 10
  52.  
  53. i, @i = 1, 1
  54.  
  55. class Numeric
  56. def add_one
  57. self + 1
  58. end
  59. end
  60.  
  61. 1..40.times do
  62. i = i.add_one
  63. end
  64.  
  65. puts i #=> 41
  66.  
  67. 1..40.times do
  68. @i = @i.add_one
  69. end
  70.  
  71. puts @i #=> 41
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