JoshCheek

JoshCheek

# 2.9% + $0.30 per transaction - https://stripe.com/us/pricing
def cost_to_process_credit_cards(payments)
  charges = payments.map { |a| a * 0.029 } + payments.map { 0.3 }
  charges.inject(0, :+).round(2)
end

# $0.25 per transaction - https://gist.github.com/amfeng/897dde5a36b91530b99e
def cost_to_process_ach(payments)
  payments.map { 0.25 }.inject(0, :+).round(2)
end

JoshCheek

# looks like github highlights non-ascii characters, but they look normal in n editor

send def really⁉
  __method__ # => :really⁉
end


send def kill_it_with_fire‼‼
  __method__ # => :kill_it_with_fire‼‼
end

JoshCheek

I went to brunch with a friend at 10:30am, took a car2go there, took an uber back b/c I had a few drinks. They called me at 7pm to tell me I hadn't ended my trip, and wouldn't b/c I had parked in the resturaunt's parking lot (I guess you're not allowed to do that). Walked 3 blocks in the cold rain to another car2go so I could get back there to end it, but the car was gone by the time I got there, so took another uber down to the car and drove it back. Paid attention this time: it gave me an "end trip" button, which I hit, it told me to put the key in the holder, I did, it sent my trip data to the server, and gave me a big splash screen saying "End Trip: turn off lights, apply parking break" I was like "wtf, that's what I did last time!" then, I noticed below all that, where I didn't notice it, it said I needed to flash my card against the reader outside the car again -.- $81 for that trip, plus the $10 uber, plus whatever they charge me to get back. Hopefully they'll realize that this is all a consequence of

JoshCheek

# Quick object model:
#   classes = containers for methods
#   objects = containers for instance variables
#   You invoke the method on the object
#   It looks it up in its class
#   The method executes in the context of the object
#   This gives it access to instance variables
#   From the outside, you *CANNOT* access instance variables
#   You can only invoke methods which have access to them

JoshCheek

var spawn = require('child_process').spawn;
var text  = atom.workspace.activePaneItem.selectAll()[0].getText(); 
ar rb     = spawn("ruby", ['-e', 'puts $stdin.read.encoding'], {"env": process.env}); 
rb.stdout.on("data", function(o) { console.log("STDOUT: "+o); }); 
rb.stderr.on("data", function(o) { console.log("STDERR: "+o); }); 
rb.stdin.write(text);
rb.stdin.end();

JoshCheek

require 'stringio'

File.open '/dev/null', 'w' do |black_hole|
  $stdout = STDOUT = black_hole
  puts 'Stdout goes into the black hole'
  system 'echo but system still gets through... bug?'
end

JoshCheek

# Classes are containers for methods
# Objects are containers for instance variables
# scopes are containers for local variables
#   and execute in the context of an object
# When you call a method on an object
#   it looks it up in the class
#   if it doesn't find it there
#   it continues looking it up in the chain of superclasses
# Module is a container for methods
#   When you include it into a class

JoshCheek

require 'minitest/autorun'
require 'minitest/pride'

class FormatPhoneNumber
  class BadNumberError < StandardError
  end

  def initialize(raw_number)
    @raw_number = raw_number
  end

JoshCheek

Gemfile           - Where you specify your dependencies
Gemfile.lock      - Bundler resolved dependencies
                    your dependencies dependencies
                    and versions that match all the Gemfile's requirements
Readme            - Text file about your project
Rakefile          - Task runner
                    $ rake -T         # see all tasks
                    $ rake db:create  # run the db:create task
app/
  assets/         - resources that get run through the asset pipeline