jfarmer

require 'rubygems'
require 'sinatra'

set :environment, :production
disable :run, :reload

get '/' do
        "Hey"
end
run Sinatra::Application

jfarmer

Backtrace: /usr/local/lib/ruby/gems/1.8/gems/facebooker-1.0.29/lib/facebooker/parser.rb:535:in `process'
/usr/local/lib/ruby/gems/1.8/gems/facebooker-1.0.29/lib/facebooker/parser.rb:15:in `parse'
/usr/local/lib/ruby/gems/1.8/gems/facebooker-1.0.29/lib/facebooker/service.rb:19:in `post'
/usr/local/lib/ruby/gems/1.8/gems/facebooker-1.0.29/lib/facebooker/session.rb:511:in `post_without_logging'
/usr/local/lib/ruby/gems/1.8/gems/facebooker-1.0.29/lib/facebooker/session.rb:522:in `post'
/usr/local/lib/ruby/gems/1.8/gems/facebooker-1.0.29/lib/facebooker/logging.rb:27:in `log_fb_api'
/usr/local/lib/ruby/1.8/benchmark.rb:308:in `realtime'
/usr/local/lib/ruby/gems/1.8/gems/facebooker-1.0.29/lib/facebooker/logging.rb:27:in `log_fb_api'
/usr/local/lib/ruby/gems/1.8/gems/facebooker-1.0.29/lib/facebooker/session.rb:521:in `post'
/usr/local/lib/ruby/gems/1.8/gems/facebooker-1.0.29/lib/facebooker/session.rb:179:in `secure!'

jfarmer

callback   same
url        different
api key    different
secret     different

jfarmer

var inject = function(iterable, initial, func) {
	var cur = initial
	for(var i = 0;i < iterable.length;i++) {
		cur = func(cur, iterable[i])
	}
	return cur
}

var map = function(arr, func) {
	return inject(arr, [], function(memo, val) {

jfarmer

We’ve built a new communication protocol that sends messages with a restricted syntax. 
We need to write a function which determines whether a given message is syntactically valid or not. 
Here are the rules:

  1. There are 15 valid characters in the protocol: the lower-case characters ‘a’ through ‘j’ 
     and the uppercase characters ‘Z’, ‘M’, ‘K’, ‘P’, and ‘Q’.
  2. Every lower-case character in isolation is a valid message, e.g., ‘a’ is a valid message.
  3. If σ is a valid message then so is Zσ.
  4. If σ and τ are valid messages then so are Mστ , Kστ , Pστ , and Qστ .
  5. All other messages are invalid.

jfarmer

# Get rid of /private ugh
if [[ $PWD =~ ^/private ]];then
  cd ${PWD#*/private}
fi

jfarmer

ioreg -n "BNBMouseDevice" | grep -i "batterypercent" | sed 's/[^0-9]//g'

jfarmer

# In Ruby everything is an object, including classes.
# That means class methods are instance methods of some object.
# But what object?

class Object
  def eigenclass 
    class << self
      self
    end 
  end 

jfarmer

true and false vs. "truthy" and "falsey" (or "falsy") in Ruby, Python, and JavaScript

Many programming languages, including Ruby, have native boolean (true and false) data types. In Ruby they're called true and false. In Python, for example, they're written as True and False. But oftentimes we want to use a non-boolean value (integers, strings, arrays, etc.) in a boolean context (if statement, &&, ||, etc.).

This outlines how this works in Ruby, with some basic examples from Python and JavaScript, too. The idea is much more general than any of these specific languages, though. It's really a question of how the people designing a programming language wants booleans and conditionals to work.

If you want to use or share this material, please see the license file, below.

Update

jfarmer

(2012-05-01 15:43) [ ] This is a todo item created on May 1st, 2012 at 3:43PM
(2012-05-02 09:10) [X] This is a completed todo item created on May 2nd, 2012 at 9:10AM
(2012-05-03 10:00) [X] Buy groceries
(2012-01-01 00:01) [ ] Make better New Years' resolutions