Create a new application at Heroku
$ heroku create

Deploy your app
$ git push heroku master

Open your app
$ heroku open

Rename your subdomain
heroku rename appnamehere

Strings are surrounded in quotes. For example, "David" is a string.

A complete list of Ruby string methods is here.

.reverse
"David".reverse
>> "divaD"

.length
"David".length
>> 5

.strip
Removes white space around a string.
"David ".strip
>> "David"

multiplication
"David" * 5
>> "DavidDavidDavidDavidDavid"

Converting Object Types

.to_s – converts to strings
.to_i – converts to integers
.to_a – converts to arrays

Arrays / Lists

Use brackets [].
[12, 47, 35]

.max
[12, 47, 35].max
>> 47

Hash / Dictionary / Associative Array

A hash is when you want to associate one thing with something else, like a dictionary. These are called Key, Value pairs.
Hashes use curly braces {}.

food["Fish"] = :yum
food["Dog"] = :yuck
food["Beef"] = :delicious

food
>> {"Fish" => :yum, "Dog" => :yuck, "Beef" => :delicious}
rating
food.keys
>> ["Fish", "Dog", "Beef"]


Blocks

Using the above example of food, you may use a block like the following to tally your results.

books.values.each { |rate| ratings[rate] += 1 }
>> [:yum, :delicious, :yuck]

ratings
>> {:yum => 1, :yuck => 1, :delicious => 1}


Another example of using a block:
5.times {print "Yes!"}
>> Yes!Yes!Yes!Yes!Yes!

Classes

String, Array, Hash are all examples of Classes.

Creating a class
class BlogEntry
attr_accessor :title, :time, :fulltext, :mood
end

attr_accessor is how you define variables, or in this case attributes attached to a class.

Let’s start a new entry.
entry = BlogEntry.new
entry.title = "Hello world!"
entry.fulltext = "Yes this is my first post!"
entry.mood = :sick
entry.time = Time.now


The initalize Method
Using the initalize method you won’t have to type the time every post.

class BlogEntry
def initalize( title, mood, fulltext )
@time = Time.now
@title, @mood, @fulltext = title, mood, fulltext
end
end

Important things to notice
Outside the class we use accessors: entry.time = Time.now. But inside we use instance variables: @time = Time.now.

Normal: http://960.gs/
Fluid: http://www.designinfluences.com/fluid960gs/12/

You can block HTML within ruby code.

<% 3.times do -%>
Ho!<br />
<% end %>
Merry Christmas!

Loop which in turn sets a variable:

<% 3.downto(1) do |count| -%>
<%= count %>…<br />
<% end %>
Lift off!

Escape HTML using h()

Email: <%= h(“Ann & Bill <frazers@isp.email>”) %>

Symbols and linking to Actions in Rails

Think of symbols in rails as “the thing named”.

So in a link for example <%= link_to “goodbye”, :action => “goodbye” %>

The thing named :action => “goodbye”

Looping through objects

<% for file in @files %>
file name is: <%= file %>
<% end %>

OR

<% @files.each do |file| %>
file name is: <%= file %>
<% end %>

http://iconza.com/

http://speckyboy.com/2009/02/02/50-of-the-best-ever-web-development-design-and-application-icon-sets/

http://www.psdvault.com

Your mail code is slightly incorrect though, generally speaking the usage for mail is:

mail(“To”,”Subject”,”Message”,”Headers”)

Which could explain why it went to junk the first time. Therefore you would have something like this established:

$headers = “MIME-Version: 1.0\r\n”;
$headers .= “Content-type: text/html; charset=iso-8859-1\r\n”; // Important to change if you ever add attachments
$headers .= “From: “.$email_address.”\r\n”;
$headers .= “Reply-To: “.$email_address.”\r\n”;
$headers .= “X-Mailer: PHP/”.phpversion().”\r\n”;

I’m sure you can work out the rest. Word of warning though, your e-mail address may be blacklisted as “junk” if you didn’t set the “from” value. There are many more headers that you may want to look up RFC2821 or some explanation on various headers.