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Simon Courtois - @happynoff
Get Slim!
Two Default Rails Stacks
http://words.steveklabnik.com/rails-has-two-default-stacks
• Views: ERB
• DB: MySQL
• Tests: MiniTest
• Fat Models /

Skinny Controllers
• Views: Haml
• DB: PostgreSQL
• Tests: RSpec
• Skinny Models /

Skinny Controllers /

Service Layer
Two Default Rails Stacks
http://words.steveklabnik.com/rails-has-two-default-stacks
• Views: ERB!
• DB: MySQL
• Tests: MiniTest
• Fat Models /

Skinny Controllers
• Views: Haml!
• DB: PostgreSQL
• Tests: RSpec
• Skinny Models /

Skinny Controllers /

Service Layer
ERB Haml
<!DOCTYPE html>
<html>
<head>
<title>Hello</title>
</head>
!
<body>
<div id=“main” class=“content”>
<%= yield %>
</div>
</body>
</html>
!!! 5
%html
%head
%title Hello
!
%body
#main.content
= yield
But there is another cool one!
Slim
ERB Slim
doctype html
html
head
title Hello
!
body
#main.content
= yield
<!DOCTYPE html>
<html>
<head>
<title>Hello</title>
</head>
!
<body>
<div id=“main” class=“content”>
<%= yield %>
</div>
</body>
</html>
What’s the difference ?
First things first…
no fucking %
(haters gonna hate)
What about attributes?
ERB
Slim
<a href=“rubyparis.org” title=“Paris.rb”>ParisRB</a>
a href=“rubyparis.org” title=“Paris.rb” ParisRB
Haml %a{href=“rubyparis.org” title=“Paris.rb”} ParisRB
Ok but why bother?
Speed!
Secondstoreach10000iterations
0
0,4
0,8
1,2
1,6
1st run 2nd run
ERB Haml Slim
https://travis-ci.org/slim-template/slim/jobs/26437512
What’s the trick then?
Spaces handling
%span Hello
%span Paris.rbHaml
Slim span Hello
span Paris.rb
Hello Paris.rb
HelloParis.rb
Spaces handling
Haml conserves spaces by default
Slim spaces are opt-in
Spaces handling
%span> Hello
%span Paris.rbHaml
Slim span Hello
span Paris.rb
HelloParis.rb
HelloParis.rb
Spaces handling
%span Hello
%span Paris.rbHaml
Slim span> Hello
span Paris.rb
Hello Paris.rb
Hello Paris.rb
Wanna nest things?
ul: li.active: a href=“rubyparis.org” Paris.rb
Go ahead!
One more thing
Like it logic-less?
- articles

p.title = title

.content = body
!
-! articles

p No articles yet!
Get it on
http://slim-lang.com/
Questions ?
Thank you
Simon Courtois - @happynoff

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