Chris Torstenson torsday

Active Record

Active Record tracks which migrations have already been run so all you have to do is update your source and run rake db:migrate. Active Record will work out which migrations should be run. It will also update your db/schema.rb file to match the structure of your database.

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References

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Iron homeostasis and the human body

Iron has profound effects on the human body. Too little and you'll be anemic, too much and you'll rust from the inside (hemochromatosis). By far the most common route to iron absorption is through ingestion.

Insoluble Fe3+ enters the GI tract, where it is almost entirely absorbed in the duodenum by enterocytes of the duodenal lining. Before it can be absorbed it must be reduced to Fe2+ by a ferric reductase enzyme on the brush border of the enterocytes. From here a divalent metal transporter protein then transports the iron across the enterocytes cell membrane and into the cell. This is the big step, the body now chooses to either store the iron as ferritin or ferroportin.

If the iron is stored as ferritin--a globular protein that is the main intracellular iron storage protein that keeps the iron soluble and non-toxic--the iron will leave the body when the cell dies and is sloughed off into the feces. Ferroportin is a transmembrane protein that transports ir

	//------------------------------------------------------------------------------------------------------------------
	// YOUR CODE: Create your Zoo "object literal" and Animal "constructor" and "prototypes" here.
	//------------------------------------------------------------------------------------------------------------------


	function Animal (name, length) {
	this.name = name;
	this.length = length;
	}

	<!doctype html>
	<html>

	<head>
	<link rel="stylesheet" href="http://cdn.jsdelivr.net/normalize/2.1.0/normalize.css">
	<link rel="stylesheet" href="main.css">
	<link rel="stylesheet" href="http://fonts.googleapis.com/css?family=Open+Sans:300,400,600,700,800">
	<link rel="stylesheet" href="http://fonts.googleapis.com/css?family=Lato:100,900">
	<link rel="stylesheet" href="http://cdnjs.cloudflare.com/ajax/libs/font-awesome/3.0.2/css/font-awesome.min.css">
	</head>


	<div class='container'>

	<h1>Register</h1>

	<form class='login' name='login' action='/user_create' method='post'>
	<input type='text' name='first_name' placeholder='First Name'></input>
	<input type='text' name='last_name' placeholder='Last Name'></input>
	<input type='email' name='email' placeholder='Email'></input>
	<input type='text' name='user_name' placeholder='Username'></input>

	$(document).ready(function () {

	// PSEUDO-CODE:
	// 1- intercept the form submission event using jQuery
	// 2- prevent the default action for that event from happening
	// 3- generate a random number between 1 and 6 using JavaScript
	// 4- use jQuery to submit an AJAX post to the form's action
	// 5- when the AJAX post is done, replace the contents of the "#die" DIV in the DOM using jQuery
	$('form').on('submit', function(e){
	e.preventDefault();

	class String
	def to_bool
	return true if self == true \|\| self =~ (/(true\|t\|yes\|y\|1)$/i)
	return false if self == false \|\| self.blank? \|\| self =~ (/(false\|f\|no\|n\|0)$/i)
	raise ArgumentError.new("invalid value for Boolean: \"#{self}\"")
	end
	end

	1. class Gear
	2 attr_reader :chainring, :cog # <-------
	3 def initialize(chainring, cog)
	4 @chainring = chainring
	5 @cog = cog
	6 end
	7
	8 def ratio
	9 chainring / cog.to_f # <-------
	10 end

	class GuessingGame

	# this is just a crapshoot, doesn't seem to help or hinder
	attr_accessor :solved
	attr_accessor :answer_int

	def initialize(answer_int)
	@answer = answer_int
	@solved = false
	end