Ruby ile tanışma!

Uğur "vigo" Özyılmazel
vigobronx vigo

webboxio
http://webbox.io

Ruby, programcıları
mutlu etmek üzere
tasarlanmıştır!
- Matz

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

python'dan daha
object orıented

5.class # => Fixnum
5.class.superclass # => Integer
5.class.superclass.superclass # => Numeric
5.class.superclass.superclass.superclass # => Object
5.class.superclass.superclass.superclass.superclass # => BasicObject

Fixnum
Integer
Numeric
Object
Basic Object

5.methods # => [:to_s, :inspect, :-@, :+, :-, :*, :/, :div, :
%, :modulo, :divmod, :fdiv, :**, :abs, :magnitude, :==, :===, :<=>, :
>, :>=, :<, :<=, :~, :&, :|, :^, :
[], :<<, :>>, :to_f, :size, :bit_length, :zero?, :odd?, :even?, :succ
, :integer?, :upto, :downto, :times, :next, :pred, :chr, :ord, :to_i,
:to_int, :floor, :ceil, :truncate, :round, :gcd, :lcm, :gcdlcm, :nume
rator, :denominator, :to_r, :rationalize, :singleton_method_added, :c
oerce, :i, :
+@, :eql?, :remainder, :real?, :nonzero?, :step, :quo, :to_c, :real,
:imaginary, :imag, :abs2, :arg, :angle, :phase, :rectangular, :rect,
:polar, :conjugate, :conj, :between?, :nil?, :=~, :!~, :hash, :class,
:singleton_class, :clone, :dup, :taint, :tainted?, :untaint, :untrust
, :untrusted?, :trust, :freeze, :frozen?, :methods, :singleton_method
s, :protected_methods, :private_methods, :public_methods, :instance_v
ariables, :instance_variable_get, :instance_variable_set, :instance_v
ariable_defined?, :remove_instance_variable, :instance_of?, :kind_of?
, :is_a?, :tap, :send, :public_send, :respond_to?, :extend, :display,
:method, :public_method, :singleton_method, :define_singleton_method,
:object_id, :to_enum, :enum_for, :equal?, :!, :!
=, :instance_eval, :instance_exec, :__send__, :__id__]

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

class Fixnum
def gün
self * 24 * 60 * 60
end
def önce
Time.now - self
end
def sonra
Time.now + self
end
end
Time.now # => 2015-01-12 12:30:37 +0200
5.gün.önce # => 2015-01-07 12:30:37 +0200
1.gün.sonra # => 2015-01-13 12:30:37 +0200

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

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

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

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

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

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

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

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

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

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

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]

class
class Person
attr_accessor :age
end
vigo = Person.new
vigo # => #<Person:0x007f98820e6ab0>
vigo.age = 43
vigo # => #<Person:0x007f98820e6ab0 @age=43>
vigo.age # => 43

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 = 43
vigo # => #<Person:0x007fc2810436c0 @name="Uğur", @age=43>
vigo.greet # => "Hello Uğur"

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

class
class Person
def is_human?
true
end
end
class Cyborg < Person
def is_human?
false
end
end
vigo = Person.new # => #<Person:0x007faa7291d268>
vigo.is_human? # => true
t800 = Cyborg.new # => #<Cyborg:0x007faa7291cbd8>
t800.is_human? # => false

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

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

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/

fotoğraflar
http://www.sitepoint.com/
https://500px.com/photo/72621187/let-me-fly-by-kshitij-bhardwaj
http://www.gratisography.com/

Ruby ile tanışma!

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