mislav

# Usage:
#   ruby -rubygems json2csv.rb my-dump.json > people.csv
# 
require 'json'; require 'csv'
FIELDS = %w(id screen_name name friends_count followers_count)
data = JSON.load ARGF
csv = CSV::Writer.create(STDOUT)
data.each { |user| csv << FIELDS.map { |f| user[f] } }

mislav

> This is a Shortwave configuration file
> http://shortwaveapp.com/
>
> Some triggers copied from benpickles (http://gist.github.com/43371)
> 
> Urls may contain the following replacement tokens:
> 
>   %s → search terms
>   %r → URL of current page
>   %d → domain part of the current URL

mislav

## requires will_paginate "agnostic" branch
class NiftyRenderer < WillPaginate::ViewHelpers::LinkRenderer
  
  protected
  
  def pagination
    [:previous_page, :nifty_info, :next_page]
  end

  def nifty_info

mislav

class Page
  include DataMapper::Resource
  
  belongs_to :crawl
  
  property :id,   Serial
  property :uri,  URI
  property :body, Text, :length => 65535
end

mislav

[alias]
	conflicts = !git ls-files --unmerged | cut -c51- | sort -u | xargs $EDITOR
	resolve = !git ls-files --unmerged | cut -c51- | sort -u | xargs git add

mislav

What did you do to get good at Rails?

  Read source code, wrote plugins

Who taught you what you know?

  Josh Susser! (about ActiveRecord)

Do you have any fond (or not so fond) memories of your learning experiences?

mislav

require 'dm-core'
DataMapper::Logger.new($stdout, :debug)
DataMapper.setup(:default, 'sqlite3::memory:')

class User
  include DataMapper::Resource
  
  has n, :follows
  has n, :followings, :model => 'Follow', :child_key => [:target_id]

mislav

#!/usr/bin/env ruby -rubygems
## solving Railscast #190 with Nibbler
## http://github.com/mislav/nibbler
## http://railscasts.com/episodes/190-screen-scraping-with-nokogiri

require 'nokogiri'
require 'open-uri'
require 'nibbler'

class Walmart < Nibbler

mislav

def update_counter(record, *names)
  updates = names.each_with_object({}) do |name, memo|
    counter = "#{name}_count"
    diff = record.send(name).count - record.send(counter)
    memo[counter] = diff unless diff.zero?
  end
  record.class.update_counters(record.id, updates) if updates.any?
end

Community.paginated_each(:per_page => 100) do |record|

mislav

require 'active_record'

class ActiveRecord::Base
  def self.magic!
    connection.tables.map { |table|
      klass = Class.new(self)
      Object.send(:const_set, table.singularize.camelize, klass)
    }.each { |model|
      model.column_names.grep(/_id$/).each { |foreign_key|
        name = foreign_key.sub(/_id$/, '')