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@@ -51,8 +51,263 @@ <h1>Ruby 2.0</h1>
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<a href="http://secretsaucepartners.com"><img src="assets/ssp.png" width="64" height="64" /></a>
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</section>
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</div>
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<section>
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<h1>Timeline</h1>
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<ul>
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<li>Ruby 1.8: 2003 August</li>
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<li>Ruby 1.9: 2007 December</li>
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<li>Ruby 2.0.0-p0: 2013 February 24</li>
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<li>Ruby 2.0.0-p195: 2013 May 14</li>
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<li>Ruby 2.0.0-p247: 2013 June 27</li>
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<li strong style="color:#bada55">Ruby 2.0.0-p353: 2013 November 22</li>
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<li>Ruby 2.1.0-p0: 2013 December 25</li>
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</ul>
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</section>
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<section>
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<h1>Install</h1>
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<h3>rvm</h3>
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<pre>
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<code>
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rvm install ruby-2.0.0
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</code>
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</pre>
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<h3>rbenv</h3>
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<pre>
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<code>
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rbenv install 2.0.0-p353
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</code>
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</pre>
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</section>
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<section>
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<h1>Compatibility</h1>
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<img src="assets/chill.png" />
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</section>
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<section>
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<h1>Deep changes</h1>
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</section>
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<section>
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<h3>Bitmap garbage collection</h3>
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</section>
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<section>
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<h3>Backwards compatible with 1.9</h3>
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</section>
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<section>
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<h3>require() speed improvements</h3>
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</section>
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<section>
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<h1>Big changes</h1>
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</section>
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<section>
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<h1>Keyword arguments</h1>
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<h3>today</h3>
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<pre>
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<code>
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def foo(foo: 'bar', baz: 'qux', **rest)
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# TODO
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end
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foo(baz: 'qux', foo: 'frob')
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</code>
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</pre>
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<h3>future</h3>
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<pre>
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<code>
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def foo(optional: 'default', required:)
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end
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</code>
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</pre>
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</section>
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<section>
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<h1>Prepend</h1>
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<pre>
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<code>
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module Foo
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def somehing; end
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end
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class MyClass
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prepend Foo
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end
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MyClass.ancestors # =>[Foo, MyClass, Object...]
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</code>
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</pre>
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<small>No more <span style="color:#bada55">alias_method_chain</span></small>
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</section>
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<section>
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<h1>Lazy enumerators</h1>
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<pre>
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<code>
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to_infinity = (0..Float::Infinity)
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beyond =to_infinity.lazy.select do |n|
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num % 42 == 0
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end
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100.times do { |n| puts beyond.next }
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</code>
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</pre>
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<h3>Enumerator#size</h3>
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<pre>
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<code>
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(1..100).to_a.permutation(4).size # => 94109400
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enum = Enumerator.new(3) do |yielder| ...; end
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def square_times(num)
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return to_enum(:square_times) {num ** 2} unless block_given?
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(num ** 2).times do |i|
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yield i
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end
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end
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</code>
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</pre>
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</section>
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<section>
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<h1>Refinements</h1>
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<pre>
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<code>
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module Palindrome
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refine String do
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def palindrome?
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self == self.reverse
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end
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end
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end
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using Palindrome # Monkey patchnow active for context
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"saippuakivikauppias".palindrome? # => true
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</code>
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</pre>
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</section>
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<section>
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<h1>Small changes</h1>
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</section>
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<section>
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<h1>Symbol array literal</h1>
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<pre>
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<code>
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%i[foo bar baz] # => [:foo, :bar, :baz]
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%I[#{1 + 1}x #{2 + 2}x] #=> [:"2x", :"4x"]
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</code>
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</pre>
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</section>
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<section>
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<h1>Binary search</h1>
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<pre>
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<code>
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haystack = (1..99999999)
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haystack.bsearch do |needle|
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needle == 12345
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end
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# => 12345
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</code>
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</pre>
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</section>
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<section>
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<h1>UTF8 by default</h1>
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<h3>Ruby 1.9</h3>
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<pre>
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<code>
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#!/usr/bin/env ruby1.9
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#encoding: utf-8
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puts "★"
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</code>
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</pre>
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<h3>Ruby 2.0</h3>
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<pre>
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<code>
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#!/usr/bin/env ruby-2.0
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puts "★"
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</code>
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</pre>
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</section>
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<section>
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<h1>File directory</h1>
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<pre>
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<code>
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# Ruby 1.8
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require File.dirname(__FILE__) + "/lib"
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File.read(File.dirname(__FILE__) + "/.config")
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# Ruby 1.9
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require_relative 'lib'
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File.read(File.dirname(__FILE__) + '/.config')
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# Ruby 2.0
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require_relative 'lib'
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File.read(__dir__ + '/.config')
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</code>
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</pre>
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</section>
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<section>
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<h1>to_h</h1>
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<pre>
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<code>
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Car = Struct.new(:make, :model, :year) do
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def build
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#...
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end
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end
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car = Car.new('Toyota', 'Prius', 2014)
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car.to_h # => {:make=>"Toyota", :model=>"Prius", :year=>2014}
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nil.to_h # => {}
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</code>
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</pre>
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<small>
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<p>Implemented for:</p>
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<ul>
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<li>nil</li>
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<li>Struct</li>
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<li>OpenStruct</li>
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<li style="text-decoration:line-through">Enumerable/Array</li>
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</ul>
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</small>
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</section>
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<section>
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<h1>ETC</h1>
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<p>
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<ul>
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<li>Unused variables can start with _</li>
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<li>caller_locations</li>
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<li>const_get understands namespaces</li>
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<li>Rubygems Gemfile support</li>
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<li>RDoc markdown support</li>
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</ul>
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</p>
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<small><a href="http://globaldev.co.uk/2013/03/ruby-2-0-0-in-detail/">and many more...</a></small>
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</section>
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<section>
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<h1>Thanks!</h1>
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<img src="assets/great_gatsby.jpg" />
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</section>
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</div>
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</div>
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