very_cool_method(egg, sausage)

What would you do? I guess something along the lines of:

spam = very_cool_method(egg, sausage)
p spam

Well, Ruby 1.9 let you do something cooler instead:

very_cool_method(egg, sausage).tap{ |s| p s }

The cool thing about tap is that you can use it to eavesdrop method chains:

very_cool_method(egg, sausage).tap{ |s| p s }.now_make_sandwich_from(bacon)

Hooray!

ActiveRecord::Base.logger = Logger.new(STDOUT)

echo "gem: --no-ri --no-rdoc" >> ~/.gemrc

Your new gems won’t include documentation at all. Hooray!

rails generate controller UsersController

and seen your app folder filled with useless files?

create app/controllers/users_controller_controller.rb
invoke erb
create app/views/users_controller
invoke test_unit
create test/functional/users_controller_controller_test.rb
invoke helper
create app/helpers/users_controller_helper.rb
invoke test_unit
create test/unit/helpers/users_controller_helper_test.rb
invoke assets
create app/assets/javascripts/users_controller.js.coffee
invoke scss
create app/assets/stylesheets/users_controller.css.scss

Eww, that’s gross.
To undo that rails generate, simply run:

rails destroy controller UserController

and rails will destroy all those ugly files for you!

remove app/controllers/users_controller_controller.rb
invoke erb
remove app/views/users_controller
invoke test_unit
remove test/functional/users_controller_controller_test.rb
invoke helper
remove app/helpers/users_controller_helper.rb
invoke test_unit
remove test/unit/helpers/users_controller_helper_test.rb
invoke assets
remove app/assets/javascripts/users_controller.js.coffee
invoke scss
remove app/assets/stylesheets/users_controller.css.scss

String.instance_eval { def foo; p "bar"; end }
String.foo = "bar"

String.class_eval { def foo; p "bar"; end }
"sausage".foo = "bar"

So, using instance_eval adds a class method.
On the other hand, using class_eval adds a instance method.

Why?

class_eval is a method of the Module class, meaning that the receiver will be a module or a class. The block you pass to class_eval is evaluated in the context of that class. Defining a method with the standard def keyword within a class defines an instance method, and that’s exactly what happens here.

instance_eval, on the other hand, is a method of the Object class, meaning that the receiver will be an object. The block you pass to instance_eval is evaluated in the context of that object. That means that String.instance_eval is evaluated in the context of the String object. Remember that a class name is simply a constant which points to an instance of the class Class. Because of this fact, defining a method in the context of Class instance referenced by String creates a class method for the String class.

The simplest rule of thumb is that you should set up a has_many :through relationship if you need to work with the relationship model as an independent entity. If you don’t need to do anything with the relationship model, it may be simpler to set up a has_and_belongs_to_many relationship (though you’ll need to remember to create the joining table in the database).

Immigrant Song

Ah-ah-ahhh-ah! Ah-ah-ahhh-ah!
We come from the land of the ice and snow,
From the midnight sun where the hot springs blow.
Hammer of the Gods will drive our ships
To new lands to fight the horde
Singing and crying: “Valhalla I am coming.”

On we sweep with, with threshing oar.
Our only goal will be the western shore.

Ah-ah-ahhh-ah! Ah-ah-ahhh-ah!
An’ we come from the land of the ice and snow,
From the midnight sun where the hot springs blow.
How soft your fields so green
Can whisper tales of gore of how we calmed
The tides of war. We are your over lords.

On we sweep with threshing oar.
Our only goal will be the western shore.

So now you better stop and rebuild all your ruins.
For peace and trust can win the day despite of all
Your losing.

Ooh-ooh. Ooh-ooh. Ooh-ooh. Ooh-ooh.
Ooh-ooh. Ooh-ooh. Ah hah hah hah hah hah.
Ooh-ooh. Ooh-ooh. Ooh-ooh. Ooh-ooh.
Ooh-ooh. Ooh-ooh. Ooh-ooh. Ooh-ooh.
Ooh-ooh

La canzone del ramingo

Ah-ah-ahhh-ah! Ah-ah-ahhh-ah!
La nostra è la terra della neve e del ghiaccio,
dove le calde fonti sgorgano sotto al sole di mezzanotte.
Il martello degli dei guiderà le nostre navi
verso nuove terre e nuove guerre,
mentre cantiamo e urliamo: “Valhalla, arriviamo!”

Avanziamo contro vento, sferzando il mare
Quella è la nostra meta, la costa occidentale.

Ah-ah-ahhh-ah! Ah-ah-ahhh-ah!
La nostra è la terra della neve e del ghiaccio,
dove le calde fonti scorrono sotto al sole di mezzanotte.
E con che dolcezza i verdi pascoli
sanno sussurrare storie di sangue e morte,
storie di guerre ormai antiche a cui abbiamo posto fine.
Noi, i signori supremi.

Avanziamo contro vento, sferzando il mare
Quella è la nostra meta, la costa occidentale.

E’ meglio se vi fermate e ricostruite le vostre rovine,
perché la pace e la fiducia possono portarvi grandi vittorie
dalle vostre sconfitte.

Ooh-ooh. Ooh-ooh. Ooh-ooh. Ooh-ooh.
Ooh-ooh. Ooh-ooh. Ah hah hah hah hah hah.
Ooh-ooh. Ooh-ooh. Ooh-ooh. Ooh-ooh.
Ooh-ooh. Ooh-ooh. Ooh-ooh. Ooh-ooh.
Ooh-ooh

Roger Waters – The bravery of being out of range

You have a natural tendency
To squeeze off a shot
You’re good fun at parties
You wear the right masks
You’re old but you still
Like a laugh in the locker room
You can’t abide change
You’re at home on the range

You opened your suitcase
Behind the old workings
To show off the magnum
You deafened the canyon
A comfort a friend
Only upstaged in the end
By the Uzi machine gun

Does the recoil remind you
Remind you of sex
Old man what the hell you gonna kill next
Old timer who you gonna kill next

I looked over Jordan and what did I see
Saw a U.S. Marine in a pile of debris
I swam in your pools
And lay under your palm trees
I looked in the eyes of the Indian
Who lay on the Federal Building steps

And through the range finder over the hill
I saw the front line boys popping their pills
Sick of the mess they find
On their desert stage
And the bravery of being out of range
Yeah the question is vexed

Old man what the hell you gonna kill next
Old timer who you gonna kill next

Hey bartender over here
Two more shots
And two more beers
Sir turn up the TV sound
The war has started on the ground

Just love those laser guided bombs
They’re really great
For righting wrongs
You hit the target
And win the game
From bars 3,000 miles away
3,000 miles away

We play the game
With the bravery of being out of range

We zap and maim
With the bravery of being out of range

We strafe the train
With the bravery of being out of range

We gain terrain
With the bravery of being out of range
With the bravery of being out of range

We play the game
With the bravery of being out of range

http://www.youtube.com/watch?v=JVfVqfIN8_c

• Hey
• Mom, Dad, this is Ryan.
• Oh so this is the famous boy we’ve been hearing so much about.
• Nice to finally meet you Mrs. L33T. And sir.
• So, Ryan, what Warcraft server do you play on?
• Is that on umm is that on the computer? Oh you know what, i think i forgot the desert in the car.
• Who do you think you are bringing his kind into my house!?
• But dad, he’s a nice guy, really.
• No he’s a n00b Jessica, a n00b!
• But ryan and I are perfect together.
• This relationship is headed for an epic fail, young lady. You’re a L33T damn it, we don’t date n00bs, we pwn them!!
• Well maybe I don’t want to be a L33T!
• Your insolence, for the lose!
• No, maybe I looove that he watches VHS tapes still. And maybe i love that his phone still has a cord.
• You might as well date someone who plays Aliance.
• I date whoever I want!
• Over my level 80 rogue’s temporary dead body!
• Mr. L33T, I may run around in circles when I play halo, and I might never get a monster kill, well, I can’t even find the space bar half the time. But I know when I find true love, and that is worth more than all the uber gear in the world.
• Too long, did not listen!

Creep

When you were here before,
Couldn’t look you in the eye
You’re just like an angel,
Your skin makes me cry

You float like a feather
In a beautiful world
I wish I was special
You’re so fuckin’ special

But I’m a creep,
I’m a weirdo
What the hell am I doin’ here?
I don’t belong here

I don’t care if it hurts,
I wanna have control
I want a perfect body
I want a perfect soul

I want you to notice
when I’m not around
You’re so fuckin’ special
I wish I was special

But I’m a creep
I’m a weirdo
What the hell am I doin’ here?
I don’t belong here, ohhhh, ohhhh

She’s running out again
She’s running out
She run run run run…
run… run…

Whatever makes you happy
Whatever you want
You’re so fuckin’ special
I wish I was special

But I’m a creep,
I’m a weirdo
What the hell am I doin’ here?
I don’t belong here

I don’t belong here…

Inquietante

Quando prima eri qui,
Non riuscivo a guardarti negli occhi,
Sei proprio un angelo
La tua pelle mi fa venire da piangere

Aleggi come una piuma
In un mondo fantastico
Vorrei essere speciale
Tu sei così speciale

Ma sono uno inquietante
Sono uno strano
Che diavolo ci faccio qui?
Non sono di qui

Non mi importa se fa male
Voglio avere il controllo
Voglio un corpo perfetto
Voglio un’anima perfetta

Voglio che tu te ne accorga
Quando non ci sono
Cazzo, sei così speciale
Vorrei essere speciale

Ma sono uno inquietante
Sono uno strano
Che diavolo ci faccio qui?
Non sono di qui

Lei sta scappando di nuovo
Lei sta scappando
Lei.. scappa

Qualunque cosa ti faccia felice
Qualunque cosa tu voglia
Cazzo, sei così speciale
Vorrei essere speciale

Ma sono uno inquietante
Sono uno strano
Che diavolo ci faccio qui?
Non sono di qui

Non sono di qui…