dnch

Ruby Intro - Setlist

• no fucking semi-colons (unless you really want them)
• irb
• local variable definition
• +, *, /, - are all methods
• puts vs print
• multiplying strings
• using if & when
• defining a method

dnch

Zip::ZipFile.open(f).read("data.txt").to_a.map { |x| x.chomp.split("|") }.delete_if { |x| x[2] == "KX" }.map { |a| BigDecimal(a.last) }.inject(0) { |sum, x| sum + x }

dnch

# First thing we need is the raw connection to our database. ActiveRecord makes this quite easy...
pg_connection = ModelName.connection.raw_connection

# Next, tell PG that we're going to be copying a boat load of data into model_names...
pg_connection.exec "COPY model_names (field_a, field_b, field_c) FROM STDIN"

# Process our file line-by-line 
IO.foreach("path/to/file.tsv", "r") do |line|
  
  # Convert our tab-delimited string into an array

dnch

class IncrementJumpingFormBuilder < ActionView::Helpers::FormBuilder  

  def fields_for_with_nested_attributes(association_name, args, block)
    name = "#{object_name}[#{association_name}_attributes]"
    association = args.first

    if association.respond_to?(:new_record?)
      association = [association] if @object.send(association_name).is_a?(Array)
    elsif !association.is_a?(Array)
      association = @object.send(association_name)

dnch

#!/usr/bin/env ruby

class Foo
  attr_accessor :bar, :baz, :florp

  def initialize(properties = {})
    properties.each do |key, value|
      self.send("#{key}=", value)
    end
  end

dnch

it "determines the controller name" do
  helper.instance_eval do      
    stub(:params).and_return(controller: 'foos')
    resource_name.should == 'foos'
    namespace.should == nil
  end
end

dnch

[PlanetExpress] dan: ~/Desktop                                    [ no repo | ree-1.8.7-2010.02@test ]
> gem install rails -v=2.2.2
Successfully installed activesupport-2.2.2
Successfully installed activerecord-2.2.2
Successfully installed actionpack-2.2.2
Successfully installed actionmailer-2.2.2
Successfully installed activeresource-2.2.2
Successfully installed rails-2.2.2
6 gems installed

dnch

function mate() {
  if [[ `pwd` == ~ && $1 = "." ]]; then
    echo "Steadfastly refusing to open your entire home directory in TextMate."
  else
    /usr/local/bin/mate $1
  fi    
}

dnch

SELECT  (field_a + field_b + field_c) AS virtual_field, *
FROM "table_name" 
WHERE ("table_name".reference_id = 9999 AND (virtual_field > 0)) 
AND (boolean_field = 't') 
ORDER BY virtual_field DESC

dnch

function grr {
  if [[ -f ./Gemfile ]]; then
    bundle exec rake routes | awk '{ print $1; }' | grep $1
  else 
    rake routes | awk '{ print $1; }' | grep $1
  end
}