dce

#!/usr/bin/env ruby

files = `grep -lir :focus spec`.split(/\n/) - ["spec/spec_helper.rb"]

if files.any?
  puts "FOCUS: #{files.inspect}"
  exit 1
end

dce

<% list_items_for @products do |product| %>
  <%= link_to product.name, product %>
<% end %>

<!--
  <li class="first"><a href="/products/1">Product #1</a></li>
  <li><a href="/products/2">Product #2</a></li>
  <li class="last"><a href="/products/3">Product #3</a></li>
-->

dce

Rails 3.1 Asset Pipeline

• The new asset pipeline in Rails 3.1 makes assets first class citizens in Rails
• Assets now in app/assets rather than public (also lib/assets, vendor/assets)
• Asset files can inline other asset files using requires
• Asset packages are defined in manifests

/*

dce

var util = require("util");

var clone = function(obj) {
  var f = function() { };
  f.prototype = obj;
  return new f;
};

var person = {
  name: "Person",

dce

my_fold := method(list, coll, lambda,
  if (list size == 0) then (
    return coll
  ) else (
    return fold(list rest,
                lambda call(coll, list first),
                lambda)
  )
)

dce

Io> make_adder := method(x, block(y, x + y))
==> method(x, 
    block(y, x + y)
)
Io> add5 := make_adder(5)
==> method(y, 
    x + y
)
Io> add5 call(3)
==> 8

dce

TXJS

Doug Crockford:

• '{' on same line (for returning obj. literals)

Brendan Eich:

• http://www.slideshare.net/BrendanEich/paren-free
• http://www.slideshare.net/BrendanEich/txjs-talk

dce

require "rubygems"
require "mp3info"

`ls -1 *.flac`.split(/\n/).each do |flac|
  filename = flac.gsub("flac", "mp3")
  `flac -d -c "#{flac}" | lame - converted/"#{filename}"`

  Mp3Info.open("converted/#{filename}") do |mp3|
    mp3.tag.title = filename[16..-5]
    mp3.tag.artist = "Artist"

dce

Vim for Rails Developers

http://www.codeulatescreencasts.com/products/vim-for-rails-developers

Intro

• Typeracer
• [Keyboard cheat sheet][2]

dce

def PostsController < ActionController::Base
  def create
    @post = Post.new(params[:post])

    if @post.save
      redirect_to posts_path
    else
      render :action => "new"
    end
  end