2015-12-munich-rubyshift/index.html

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<hgroup class="">
       <h2 class=" "><div id="outline-container-orgheadline2" class="outline-2">
<h2 id="orgheadline2">Advent of Code</h2>
</div>
</h2>
       <h3></h3>
       </hgroup>
<article class="" id="text-">
<p>
<a href="http://adventofcode.com/">http://adventofcode.com/</a>
</p>


</article>

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<slide id="sec-"  >
<hgroup class="">
       <h2 class=" "><div id="outline-container-orgheadline1" class="outline-3">
<h3 id="orgheadline1">Serious Math Flashback Warning</h3>
</div>
</h2>
       <h3></h3>
       </hgroup>
<article class="smaller" id="text-">
<p>
A present with dimensions <code>2x3x4</code> requires <code>2*6 + 2*12 + 2*8 = 52</code> square
feet of wrapping paper plus 6 square feet of slack, for a total of
58 square feet.
</p>

<p>
A present with dimensions <code>1x1x10</code> requires <code>2*1 + 2*10 + 2*10 = 42</code>
square feet of wrapping paper plus 1 square foot of slack, for a
total of 43 square feet.
</p>

<p>
<b>All numbers in the elves' list are in feet. How many total square
feet of wrapping paper should they order?</b>
</p>


</article>

</slide>

</slide>

</slide>
<slide id="sec-"  >
<hgroup class="">
       <h2 class=" "><div id="outline-container-orgheadline3" class="outline-2">
<h2 id="orgheadline3">24 Pull Requests</h2>
</div>
</h2>
       <h3></h3>
       </hgroup>
<article class="" id="text-">
<p>
<a href="http://24pullrequests.com/languages/ruby">24pullrequests.com/languages/ruby</a>
</p>
<article class="flexbox vcenter">

<div class="figure">
<p><img src="images/24pullrequests.png" alt="24pullrequests.png" width="600px" />
</p>
</div>
</article>


</article>

</slide>

</slide>
<slide id="sec-"  >
<hgroup class="">
       <h2 class=" "><div id="outline-container-orgheadline4" class="outline-2">
<h2 id="orgheadline4">Upgrade your Passenger now</h2>
</div>
</h2>
       <h3></h3>
       </hgroup>
<article class="" id="text-">
<p>
If your're reading this <b>today</b>, you're late. :D
<a href="https://blog.phusion.nl/2015/12/07/cve-2015-7519/">https://blog.phusion.nl/2015/12/07/cve-2015-7519/</a>
</p>

<ul class="build">
<li><code>X_User: Bob, X-Auth-Token: ValidMallory</code></li>
<li><code>HTTP_X_USER: Bob, HTTP_X_USER: Mallory</code></li>
</ul>


</article>

</slide>

</slide>
<slide id="sec-"  >
<hgroup class="">
       <h2 class=" "><div id="outline-container-orgheadline9" class="outline-2">
<h2 id="orgheadline9">ROM 1.0</h2>
</div>
</h2>
       <h3></h3>
       </hgroup>
<article class="" id="text-">
<p>
<a href="http://rom-rb.org/blog/2015/11/24/first-beta-of-rom-1-0-0-has-been-released/">http://rom-rb.org/blog/2015/11/24/first-beta-of-rom-1-0-0-has-been-released/</a>
</p>

<p>
1.0.0beta2
</p>


</article>

</slide>
<slide id="sec-"  >
<hgroup class="">
       <h2 class=" "><div id="outline-container-orgheadline5" class="outline-3">
<h3 id="orgheadline5">Command API</h3>
</div>
</h2>
       <h3></h3>
       </hgroup>
<article class="" id="text-">
<div class="org-src-container">

<pre class="prettyprint" data-lang="ruby">
create_command = rom.command.create(user: :users) do |user|
  user.create(:books)
end

create_command.call(
  user: {
    name: "Jane",
    books: [{ title: "Book 1" }, { title: "Book 2" }]
  }
)

result.success?
result.failure?
</pre>

</div>


</article>

</slide>

</slide>
<slide id="sec-"  >
<hgroup class="">
       <h2 class=" "><div id="outline-container-orgheadline6" class="outline-3">
<h3 id="orgheadline6">Relation API: views</h3>
</div>
</h2>
       <h3></h3>
       </hgroup>
<article class="" id="text-">
<div class="org-src-container">

<pre class="prettyprint" data-lang="ruby">
class Users &lt; ROM::Relation[:sql]
  view(:listing, [:id, :name, :email]) do |*order_args|
    select(:id, :name, :email).order(*order_args)
  end
end

rom.relation(:users).listing(:name, :id)
</pre>

</div>


</article>

</slide>

</slide>
<slide id="sec-"  >
<hgroup class="">
       <h2 class=" "><div id="outline-container-orgheadline7" class="outline-3">
<h3 id="orgheadline7">Mappers</h3>
</div>
</h2>
       <h3></h3>
       </hgroup>
<article class="" id="text-">
<div class="org-src-container">

<pre class="prettyprint" data-lang="ruby">
class MyMapper &lt; ROM::Mapper
  attribute :address, from: [:city, :street, :zipcode] do |city, street, zipcode|
    "#{zipcode}, #{city}, #{street}"
  end
end
</pre>

</div>


</article>

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</slide>
<slide id="sec-"  >
<hgroup class="">
       <h2 class=" "><div id="outline-container-orgheadline8" class="outline-3">
<h3 id="orgheadline8">Hire Piotr!</h3>
</div>
</h2>
       <h3></h3>
       </hgroup>
<article class="" id="text-">
<article class="flexbox vcenter">

<div class="figure">
<p><img src="images/piotr.png" alt="piotr.png" width="600px" />
</p>
</div>
</article>

<p>
(<a href="http://www.solnic.eu/about.html">solnic.eu</a>)
</p>


</article>

</slide>

</slide>

</slide>
<slide id="sec-"  >
<hgroup class="">
       <h2 class=" "><div id="outline-container-orgheadline10" class="outline-2">
<h2 id="orgheadline10">Minuteman 2.0</h2>
</div>
</h2>
       <h3></h3>
       </hgroup>
<article class="" id="text-">
<div class="org-src-container">

<pre class="prettyprint" data-lang="ruby">
class SomethingController &lt; ApplicationController
  def create
    track("something:create", current_user.id) if current_user
  end
  def index
    @current_events = events
  end
  def show
    @group = analytics.month("something:create") - analytics.month("free:users")
  end
end
</pre>

</div>

<p>
<a href="http://elcuervo.github.io/minuteman/">http://elcuervo.github.io/minuteman/</a>
</p>


</article>

</slide>
</slide>
<slide id="sec-"  >
<hgroup class="">
       <h2 class=" "><div id="outline-container-orgheadline14" class="outline-2">
<h2 id="orgheadline14">Ruby 2.3</h2>
</div>
</h2>
       <h3></h3>
       </hgroup>
<article class="" id="text-">
<p>
Christmas Ruby!
<a href="http://nithinbekal.com/posts/ruby-2-3-features/">http://nithinbekal.com/posts/ruby-2-3-features/</a>
</p>


</article>
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<slide id="sec-"  >
<hgroup class="">
       <h2 class=" "><div id="outline-container-orgheadline11" class="outline-3">
<h3 id="orgheadline11">New Operator &amp;.</h3>
</div>
</h2>
       <h3></h3>
       </hgroup>
<article class="" id="text-">
<div class="org-src-container">

<pre class="prettyprint" data-lang="ruby">
puts "well" if user &amp;&amp; user.exists?
puts "this is nice" if user&amp;.exists?
</pre>

</div>


</article>

</slide>
</slide>
<slide id="sec-"  >
<hgroup class="">
       <h2 class=" "><div id="outline-container-orgheadline12" class="outline-3">
<h3 id="orgheadline12">Frozen Strings!</h3>
</div>
</h2>
       <h3></h3>
       </hgroup>
<article class="" id="text-">
<div class="org-src-container">

<pre class="prettyprint" data-lang="ruby">
cone = 'chocolate'.freeze
cone &lt;&lt; 'icecream!' # can't modify frozen String (RuntimeError)
</pre>

</div>

<p>
Transition via <code>frozen_string_literal: true</code>
</p>


</article>

</slide>

</slide>
<slide id="sec-"  >
<hgroup class="">
       <h2 class=" "><div id="outline-container-orgheadline13" class="outline-3">
<h3 id="orgheadline13">Fetch values from Enumerable</h3>
</div>
</h2>
       <h3></h3>
       </hgroup>
<article class="" id="text-">
<div class="org-src-container">

<pre class="prettyprint" data-lang="ruby">
h = { foo: 1, bar: 2, baz: 3}
h.values_at(:foo, :boom)    #=&gt; [1, nil]
h.fetch_values(:foo, :boom) #=&gt; raise KeyError
</pre>

</div>


</article>

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