brentmc79

Getting Started With Quadcopters

Learn to Fly

Buy a Hubsan X4. Fly it. Crash it. Repeat. Do this until you feel comfortable in the air.

Nomenclature

• 250/450/etch - This refers to the size of the quad, specifically the motor-to-motor distance in millimeters. 250 is the standard FPV race quad size.
• FPV - First Person View

brentmc79

Keybase proof

I hereby claim:

• I am brentmc79 on github.
• I am brentmc79 (https://keybase.io/brentmc79) on keybase.
• I have a public key whose fingerprint is 5F29 03D2 B112 A145 BD8A 6050 73EA 5B38 8EA7 1767

To claim this, I am signing this object:

brentmc79

describe Address do
  permute "validations" do
    cases [
      [:address,      :address_2,   :city,            :state,   :zip,     :country,   :valid,   :errors_on],
      [ nil,          nil,          nil,              nil,      nil,      nil,        false,    ['address', 'city', 'state', 'zip', 'country']],
      ['123 Main St', 'Apt 100',    'Pleasantville',  'NC',     '12345',  'US',       true,     []],
      ['123 Main St'  'Apt 100',    'Pleasantville'   'NC'      '12345'   nil,        false     ['country']]
      ['123 Main St'  'Apt 100',    'Pleasantville'   'NC'      '12345'   'U',        false     ['country']]
      ['123 Main St'  'Apt 100',    'Pleasantville'   'NC'      '12345'   'USA',      false     ['country']]
    ]

brentmc79

def raises_exception?
      begin
        yield
      rescue => ex
        Rails.logger.info("Exception occurred (#{ex.class.to_s}): #{ex.message}")
        flash[:error] = "There was a problem completing your request.  Please try again later."
        redirect_to request.referrer
        return true
      end
      return false

brentmc79

colorscheme blackboard
set go-=T
set number
set guifont=monaco
set dir=/tmp,/var/tmp/,.
set co=200
set lines=54
set shiftwidth=2
set tabstop=2
set expandtab

brentmc79

#my controller action
  def edit
    respond_to do |format|
      format.js {render :partial => "ajax_form", :locals => {:expense => @expense} && return}
      format.html {raise "boom"}
    end
  end


#from the log

brentmc79

You have a nil object when you didn't expect it!
The error occurred while evaluating nil.expand_pastes?
/Users/brent/Intridea/presently/app/models/update.rb:623:in `to_xmpp_payload'
/Users/brent/.gem/ruby/1.8/gems/builder-2.1.2/lib/builder/xmlbase.rb:134:in `call'
/Users/brent/.gem/ruby/1.8/gems/builder-2.1.2/lib/builder/xmlbase.rb:134:in `_nested_structures'
/Users/brent/.gem/ruby/1.8/gems/builder-2.1.2/lib/builder/xmlbase.rb:58:in `method_missing'
/Users/brent/Intridea/presently/app/models/update.rb:563:in `to_xmpp_payload'
/Users/brent/.gem/ruby/1.8/gems/builder-2.1.2/lib/builder/xmlbase.rb:134:in `call'
/Users/brent/.gem/ruby/1.8/gems/builder-2.1.2/lib/builder/xmlbase.rb:134:in `_nested_structures'
/Users/brent/.gem/ruby/1.8/gems/builder-2.1.2/lib/builder/xmlbase.rb:58:in `method_missing'

brentmc79

class Book < ActiveRecord::Base
  has_many :taggings, :as => :taggable
  has_many :tags, :through => :taggings
end

brentmc79

class Tagging < ActiveRecord::Base
  belongs_to :taggable, :polymorphic => true
  belongs_to :tag
end

brentmc79

class Tag < ActiveRecord::Base
  has_many :taggings, :dependent => :destroy
  has_many :books, :through => :tagings, :source => :taggable, :source_type => "Book"
  has_many :movies, :through => :tagings, :source => :taggable, :source_type => "Movie"
end