Whats up in Ruby 2.0

A quick overview of the cool changes in Ruby 2.0 release.

Transcript

1. RUBY 2.0
   What u in
   DOMAS BITVINSKAS
   domasbitvinskas.com
   @Nedomas
   

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2. 20
   27.days.ago
   ruby can almost play poke lega y
   

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3. Syntax sparkle
   Evolved monkeys
   PERFORMANCE booooost
   PR
   “100 hundred procent compatibl” - Matz
   

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4. ❤ = 'love'
   puts ❤
   UTF-8 default encoding
   

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5. class Integer
   def dalinasi_iš?(skaičius)
   skaičius != 0 ? self % skaičius == 0 : zero?
   end
   end
   puts 6.dalinasi_iš?(2)
   

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6. kwargs
   

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7. # ruby 1.9
   def shout(opts={})
   loud = opts[:loud] || 'Hello'
   quiet = opts[:quiet] || 'World'
   p "#{loud} #{quiet}!"
   end
   shout loud: "Old", quiet: "School"
   # ruby 2.0
   def shout(loud: 'Hello', quiet: 'World')
   p "#{loud} #{quiet}!"
   end
   shout loud: "New", quiet: "School"
   

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8. %i(an array of symbols)
   => [:an, :array, :of, :symbols]
   %I(#{100-50} shades of grey)
   => [:"50", :shades, :of, :grey]
   PRO-TIP
   

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9. module Logger
   def log(msg)
   p msg
   end
   end
   class Logic
   include Logger
   def log(msg)
   p msg.reverse
   end
   end
   Module prepend
   

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10. module Logger
    def log(msg)
    p msg
    end
    end
    class Logic
    prepend Logger
    def log(msg)
    p msg.reverse
    end
    end
    Logic.new.log("Some message")
    # "Some message"
    Logic.ancestors
    # include => [Logic, Logger, Object, Kernel, BasicObject]
    # prepend => [Logger, Logic, Object, Kernel, BasicObject]
    Module prepend
    

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11. ENUMERATORS
    even_numbers = (1..10000).select(&:even?).map(&:to_s)
    even_numbers = (1..10000).inject([]) do |acc, number|
    if number.even?
    acc << number.to_s
    else
    acc
    end
    end
    for the lazy
    

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12. ENUMERATORS
    even_numbers = (1..10000).lazy.select(&:even?).map(&:to_s)
    even_numbers = (1..10000).inject([]) do |acc, number|
    if number.even?
    acc << number.to_s
    else
    acc
    end
    end
    for the lazy
    

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13. REFINEMENTS
    experimental
    module Fun
    refine Fixnum do
    def +(_)
    super - rand(3)
    end
    end
    end
    using Fun
    p 5 + 5
    

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14. MAŽI GRAŽŪS DALYKAI
    

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15. Drummer = Struct.new(:name, :age, :band)
    idol = Drummer.new("Carter Beauford", 55, "Dave Matthews Band")
    p idol
    # => #
    p idol.to_h
    # => {:name=>"Carter Beauford", :age=>55, :band=>"Dave Matthews
    Band"}
    .to_h
    

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16. ONIGMO
    REGEX VARIKLIS
    "this\nis\vMr.\rNeo".gsub(/\R/, ' ')
    

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17. Array
    Range
    #bsearch
    p [1, 2, 3, 6, 9, 15].bsearch {|i| i > 4 }
    p (1..10000000000000).bsearch {|i| i > 9 }
    

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18. _ _di _ _
    

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19. IMPROVE
    GARBAGE & STUFF!
    RubyGem 2.0 & RDoc 4.0
    

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20. AČIŪ
    

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