Ruby 101

Basic ruby introduction for Railsgirls İstanbul 2018

Transcript

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2. Uğur "vigo" Özyılmazel
   vigobronx vigo
   

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3. PROGRAMLAMA DİLİ
   

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5. Ruby, programcıları
   mutlu etmek üzere
   tasarlanmıştır!
   - Matz
   

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6. TÜRKÇE BİLİYOR!
   

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7. şehirler = %w[İstanbul Ankara Viyana Paris]
   gittiğim_şehirler = %w[İstanbul Viyana]
   puts "Gitmem gereken şehirler", şehirler - gittiğim_şehirler
   Gitmem gereken şehirler
   Ankara
   Paris
   

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8. Herşey : nesne
   

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9. 5.class # => Integer
   5.class.superclass # => Numeric
   5.class.superclass.superclass # => Object
   5.class.superclass.superclass.superclass # => BasicObject
   5.class.superclass.superclass.superclass.superclass # => nil
   

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10. Integer
    Numeric
    Object
    Basic Object
    

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11. 5.methods # => [:-
    @, :**, :<=>, :upto, :<=, :==, :chr, :===, :>>, :[], :
    %, :&, :inspect, :
    +, :ord, :-, :/, :*, :size, :succ, :, :to_int, :coerce, :divmod, :to_
    s, :to_i, :fdiv, :modulo, :remainder, :abs, :magnitude, :lcm, :integer?, :
    rationalize, :gcdlcm, :gcd, :denominator, :floor, :ceil, :round, :truncate
    , :to_r, :to_f, :^, :odd?, :even?, :allbits?, :anybits?, :nobits?, :downto
    , :times, :pred, :pow, :bit_length, :digits, :numerator, :next, :div, :|,
    :~, :
    +@, :conjugate, :eql?, :singleton_method_added, :i, :real?, :zero?, :nonze
    ro?, :finite?, :infinite?, :step, :positive?, :negative?, :angle, :real, :
    to_c, :conj, :phase, :imag, :abs2, :arg, :imaginary, :rectangular, :rect,
    :clone, :dup, :polar, :quo, :between?, :clamp, :instance_variable_set, :in
    stance_variable_defined?, :remove_instance_variable, :instance_of?, :kind_
    of?, :is_a?, :tap, :instance_variable_get, :public_methods, :instance_vari
    ables, :method, :public_method, :define_singleton_method, :singleton_metho
    d, :public_send, :extend, :pp, :to_enum, :enum_for, :=~, :!
    ~, :respond_to?, :freeze, :object_id, :send, :display, :nil?, :hash, :clas
    s, :singleton_class, :yield_self, :itself, :tainted?, :taint, :untrust, :u
    ntaint, :trust, :untrusted?, :methods, :frozen?, :singleton_methods, :prot
    ected_methods, :private_methods, :!, :equal?, :instance_eval, :instance_ex
    ec, :!=, :__id__, :__send__]
    

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12. TÜM SINIFLAR AÇIKTIR!
    

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13. class Integer
    def kere(n)
    self * n
    end
    end
    5.kere(5) # => 25
    5.kere(5).kere(2) # => 50
    

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14. class Integer
    def gün
    self * 24 * 60 * 60
    end
    def önce
    Time.now - self
    end
    def sonra
    Time.now + self
    end
    end
    Time.now # => 2018-11-23 14:42:23 +0300
    5.gün.önce # => 2018-11-18 14:42:23 +0300
    1.gün.sonra # => 2018-11-24 14:42:23 +0300
    

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15. konuşma dİlİne benzer
    

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16. 5.times do |i|
    puts "Ruby’i seviyorum, i = #{i}" if i > 2
    end
    # Ruby’i seviyorum, i = 3
    # Ruby’i seviyorum, i = 4
    

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17. meals = %w[Pizza Döner Kebab]
    print "Let’s eat here!" unless meals.include? "Soup"
    menü'de çorba yoksa
    yemeğİ burada YİYELİM!
    

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18. varıable
    merhaba = "Dünya" # Değişken
    @merhaba # Instance Variable
    @@merhaba # Class Variable
    $merhaba # Global Variable
    MERHABA # Constant
    

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19. ARRAY
    [] # => []
    [1, "Merhaba", 2]
    # => [1, "Merhaba", 2]
    [[1, 2], ["Merhaba", "Dünya"]]
    # => [[1, 2], ["Merhaba", "Dünya"]]
    

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20. hash
    {} # => {}
    {:foo => "bar"} # => {:foo=>"bar"} # Eski
    {foo: "bar"} # => {:foo=>"bar"} # Yeni
    

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21. parantez?
    def merhaba kullanıcı
    "Merhaba #{kullanıcı}"
    end
    merhaba "vigo" # => "Merhaba vigo"
    

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22. SORU İŞARETİ
    [].empty? # => true
    ["vigo", "ezel"].include? "vigo" # => true
    user.admin? # => false
    

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23. ÜNLEM İŞARETİ
    isim = "vigo"
    isim.reverse # => "ogiv"
    isim # => "vigo"
    isim.reverse! # => "ogiv"
    isim # => "ogiv"
    

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24. zİNCİRLEME METHODLAR
    "vigo".reverse.reverse # => "vigo"
    ["v", "i", "g", "o"].join.reverse.split(//).join.reverse
    # => "vigo"
    

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25. İterasyon
    [1, "merhaba", 2, "dünya"].each do |eleman|
    puts eleman
    end
    [1, "merhaba", 2, "dünya"].each {|eleman| puts eleman}
    # 1
    # merhaba
    # 2
    # dünya
    

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26. İterasyon
    [1, 2, 3, 4, 5].select{|number| number.even?}
    # => [2, 4]
    [1, 2, 3, 4, 5].inject{|sum, number| sum + number}
    # => 15
    [1, 2, 3, 4, 5].map{|number| number * 2}
    # => [2, 4, 6, 8, 10]
    

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27. class
    class Person
    attr_accessor :age
    end
    vigo = Person.new
    vigo # => #
    vigo.age = 46
    vigo # => #
    vigo.age # => 46
    

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28. class
    class Person
    attr_accessor :age # Getter & Setter
    def initialize(name)
    @name = name
    end
    def greet
    "Hello #{@name}"
    end
    end
    vigo = Person.new "Uğur"
    vigo.age = 46
    vigo # => #
    vigo.greet # => "Hello Uğur"
    

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29. class
    class Person
    def initialize(name)
    @name = name
    end
    def age=(value)
    @age = value
    end
    def age
    @age
    end
    def greet
    "Hello #{@name}"
    end
    end
    vigo = Person.new "Uğur"
    vigo.age = 43
    Getter
    Setter
    attr_accessor :age
    }
    

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30. class
    class Person
    def is_human?
    true
    end
    end
    class Cyborg < Person
    def is_human?
    false
    end
    end
    vigo = Person.new # => #
    vigo.is_human? # => true
    t800 = Cyborg.new # => #
    t800.is_human? # => false
    

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31. module + MIXIN
    module Greeter
    def say_hello
    "Hello #{@name}"
    end
    end
    class Person
    include Greeter
    def initialize(name)
    @name = name
    end
    end
    vigo = Person.new "Uğur"
    vigo.say_hello # => "Hello Uğur"
    

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32. İLERİ SEVİYE KONULAR
    Meta Programming
    Monkey Patching
    Block & Proc & Lambda
    Functional Programming
    

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33. kaynaklar
    http://www.ruby-doc.org/
    http://vigo.gitbooks.io/ruby-101/
    http://tryruby.org/
    http://rubykoans.com/
    https://rubymonk.com/
    https://www.ruby-lang.org/en/documentation/quickstart/
    https://www.ruby-lang.org/en/documentation/ruby-from-other-languages/
    

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