o que tem de novo no ruby 2.0?

O que tem de novo no

Ruby 2?Fabio Akita

@akitaonrailscodeminer42.com

Ruby 0.95 Dez 1995

Ruby 1.8 Ago 2003

Rails 0.8 Dez 2005

Ruby 1.9 Dez 2007

Ruby 0.95 Dez 1995

Ruby 1.8 Ago 2003

Rails 0.8 Dez 2005

Ruby 1.9 Dez 2007

Ruby 0.95 Dez 1995

Ruby 1.8 Ago 2003

Rails 0.8 Dez 2005

Ruby 1.9 Dez 2007

Ruby 0.95 Dez 1995

Ruby 1.8 Ago 2003

Rails 0.8 Dez 2005

Ruby 1.9 Dez 2007

Ruby 2.024 de Fevereiro de 2013

Compatível com 1.9

Literal Symbol List

> %q[hello world]=> "hello world"

> %i[hello world]=> [:hello, :world]

Keyword Arguments

def foo(options = {}) param1 = options[:param1] param2 = options[:param2] return [param1, param2]end

> foo param1: "Hello", param2: "World"=> ["Hello", "World"]

def foo(param1: nil, param2: nil) return [param1, param2]end

> foo param1: "Hello", param2: "World"=> ["Hello", "World"]

Module Prepend

> [1,2,3].to_s=> "[1, 2, 3]"

module Foo def self.included(base) base.class_eval do alias_method :original_to_s, :to_s def to_s original_to_s + ", Foo" end end endend

class Array include Fooend

> [1,2,3].to_s=> "[1, 2, 3], Foo"

> Array.ancestors=> [Array, Foo, Enumerable, Object, Kernel, BasicObject]

module Foo def to_s super + ", Foo" endend

class Array prepend Fooend

> [1,2,3].to_s=> "[1, 2, 3], Foo"

> Array.ancestors=> [Foo, Array, Enumerable, Object, Kernel, BasicObject]

Lazy Enumerators

> a = (0..3).map { |i| i }=> [0, 1, 2, 3]

> a = (0..3).lazy.map { |i| i }=> #<Enumerator::Lazy: #<Enumerator::Lazy: 0..3>:map>

> a.next=> 0> a.next=> 1> a.next=> 2> a.next=> 3

> a = (0..Float::INFINITY).lazy.map { |i| i }=> #<Enumerator::Lazy: #<Enumerator::Lazy: 0..Infinity>:map>

> a.next=> 0> a.next=> 1> a.next=> 2> a.next=> 3

Re!nements

module Foo def hello "Hello, #{to_s}" endend

class Array include Fooend

> [1,2,3].hello=> "Hello, [1, 2, 3]"

module Foo refine Array do def hello "Hello, #{to_s}" end endend

using Foo

> [1,2,3].hello=> "Hello, [1, 2, 3]"

module Foo refine Array do def hello "Hello, #{to_s}" end endend

using Foo

> [1,2,3].hello=> "Hello, [1, 2, 3]"

def bah [1,2,3].helloend

> bah.helloNoMethodError: undefined method `hello' for "Hello, [1, 2, 3]":String

http://rvm.io

curl -L https://get.rvm.io | bash -s stable --rails --autolibs=enabled

http://gembundler.com/

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M&SMark & Sweep GC

struct RBasic { VALUE flags; VALUE klass;};

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OOBWOut of Band Work

LazyLazy Sweep GC - Ruby 1.9.3

“CoW”Copy on Write

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GC.start

BitmapBitmap Marking GC - Ruby 2.0

9 00001001

8 00001000

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00000001 2^0 1 User

00000010 2^1 2 Moderator

00000100 2^2 4 Administrator

00000001 2^0 1 User

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00000100 2^2 4 Administrator

00000001 2^0 1 User

00000010 2^1 2 Moderator

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0 0 0 0 0 0 0 01 1 1

0 0 0 0 0 0 0 01 1 1

fork()

fork()

fork()

Browser Browser Browser Browser

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Worker Worker Worker Worker

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Ruby Ruby Ruby Ruby Ruby Ruby Ruby Ruby Ruby

Rails Rails Rails Rails Rails Rails Rails Rails Rails

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Rails 3.2.12+

Rails 4.0

Thanks!@akitaonrails