Ruby (on Rails) PHPBenelux @ Nucleus 

• @joren • Openminds • ArrrrCamp 

Ruby 

History 

History • 1995 • Yukihiro Matsumoto (aka Matz) • Philosophy: Designed for programmer productivity and fun. 

History • Inspired by Perl, Smalltalk, Lisp, Python • “I wanted a scripting language that was more powerful than Perl, and more object-oriented than Python. That's why I decided to design my own language.” 

Syntax 

Dynamic typing 

Strong typing 

Duck typing • it walks like a duck; • it talks like a duck; • it will probably be a duck. 

Objects 

Objects • Everything is an object • Defined by its BEHAVIOUR 

Objects Even primitive types 

Classes - Modules • can be instantiated • object creation • can inherit • cannot be included • can *not* be instantiated • mixin facility, namespace • no inheritance • can be included in classes and modules 

Classes - Modules 

Dynamic re-open everything 

Dynamic 

Dynamic 

Variables 

Methods 

Methods 

Strings & numbers 

Arrays 

Hashes 

Loops 

Conditions 

Stdlib abbrev base64 benchmark bigdecimal cgi cmath coverage csv curses date dbm debug delegate digest dl drb e2mmap English erb etc extmk fcntl fiddle fileutils find forwardable gdbm getoptlong gserver iconv io/console io/nonblock io/wait ipaddr irb json logger mathn matrix minitest minitest/benchmark minitest/spec mkmf monitor mutex_m net/ftp net/ http net/imap net/pop net/smtp net/telnet nkf objspace observer open- uri open3 openssl optparse ostruct pathname pp prettyprint prime profile profiler pstore psych pty racc racc/parser rake rdoc readline resolv resolv-replace rexml rinda ripper rss rubygems scanf sdbm securerandom set shell shellwords singleton socket stringio strscan sync syslog tempfile test/unit thread thwait time timeout tk tmpdir tracer tsort un uri weakref webrick win32ole xmlrpc yaml zlib 

Gems • + 65.000 gems • little code libraries/modules • gem install twitter 

Rails just another gem 

History • 37 Signals (Basecamp) • David Heinemeier Hansson (aka DHH) • July 2004 

MVC 

Models • persintence-layer • validations • data manipulation methods • define relations • CRUD 

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Views • templates • html (erb, haml, slim), xml, pdf, json • custom languages 

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Controllers • get, post, patch, put, delete,… • parameter parsing • session / cookie management 

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REST 

generators • rails generate model Product name description:text • rails generate controller products • rails generate mailer OrderMailer • rails generate migration AddActiveToProducts active:boolean • rails generate scaffold products • ‘rails generate’ to view all possibilities 

Migrations • rake db:migrate • rake db:migrate:rollback • rake db:migrate:redo 

Migrations 

$ rake • rake is to ruby what make is to C • run little ruby scripts • often used for cronjobs • rake -T 

Convention Over Configuration 

Sinatra 

Sinatra 

Development 

Ruby Version Management • chruby • rvm 

Bundler • gem version management • bundle install rails • bundle update rails • bundle exec rails console • Gemfile & Gemfile.lock 

Bundler 

Tests • mini_test, unit_test • RSpec • cucumber • capybara 

Run it • Local • bundle exec rails server • pow.cx 

Run it • Online • rack: unicorn, puma, passenger 

Deploy • mina • capistrano • cap deploy 

Community & Learn 

Ruby Tapas 

RailsCasts 

learn.thoughtbot.com/rails 

Ruby Rogues (+parley) 

Visit a conference (like ArrrrCamp) 

rails girls <3 

So… 

Ruby makes me happy 

Tell a story 

Thanks! Let’s have a drink.