[Script Info]
Title: 
[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Hey, I am Sandi Metz and I am the
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,last but one speaker and that means
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,you have almost made it.\N[audience laughter]
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,You get a break, there's another keynote
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,if you stay for that –
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,it's really bright up here, I'm going to have
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,to look at you some. So, yeah,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,you've almost arrived. Even those of you who
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,are new have almost survived a total RailsConf
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and so I think we should – let's do this –
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,sponsors pay the bills, they do, we're glad. [clapping]
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Thank 'em.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,But even more than that
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,"human people" organize this conference
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and if you see – this is your job before you
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,leave today – find someone in one of those
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,red shirts, and say thank you.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Alright? Let's thank 'em here.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Thank 'em in person.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Going to start my clock, I have about –
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I really do have about 40 minutes.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I don't have 500 slides of code this year,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,though, so… it's not going to be that bad.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Yeah, let's just go. So
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I'm Sandi Metz and I'm really happy to be here
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and I have a talk. This years talk is
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,about code smells.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,This is a term invented by this guy. So
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,it's really, uh, we did not plan that
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I would follow Katrina
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,but it's the perfect talk to follow her
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,talk. She just mentioned this guy's name.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,This guy's name is Kent Beck. This guy's
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Martin Fowler, he's the man who wrote
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,this book, which is the book
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,that teaches us to do refactoring.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,They collaborated together on the
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,third chapter of that book, and
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,it's like naming things wins and
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,the name "code smell", the reason why
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,you know that term today is because
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,of what these guys did back in the 1990s.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Now,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I wrote a book a couple of years ago
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,– before that, I wrote code for 35 years,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I went to my desk every day and
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,wrote code – and now, I don't do that.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I teach. I teach classes in
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,object-oriented design.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,And in my classes,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I have occasion to ask people
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,if they've heard of code smells
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and just like I suspect all of you
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,everyone in my class always says
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,"Oh yeah, we know what code smells
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,are." And then I ask them
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,to list five…
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and no one can.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Alright, okay, now I can hear
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,you trying, but really most of you cannot.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I know that, okay.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,And so, we all think
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,we know about this term
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,but it doesn't mean "I don't like your
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,code and I can't tell you why."
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,That is not what a code smell is.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,There is some opinion involved
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,but really, it's not just that I
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,disagree with how you wrote your code,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,the standard is higher. These smells –
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,these 22 different smells all have
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,very precise meanings…
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and the power, the magic if you will
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,of this list is they've given things
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,names. Once you've given a complex idea
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,a name, if we could just
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,learn what that name stood for
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,it means we could just talk to each other
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,in an unambiguous way without
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,having miscommunications. And so
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,one of the things they talk about –
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,very often when people talk about
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,code smells, they prefix "code smell"
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,with the word "bad".
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,They say "bad smells".
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,But really, the definition of a code
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,smell is that it might indicate a problem.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,You don't have an obligation
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,to filter out all the smells,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and it's actually important that you not.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,It's also worth getting familiar
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,with code smells because they have
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,such great names.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Look at this list.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,"Feature Envy" – that's cool.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I like this one, the one that
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,needs a code of conduct:
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,"Innappropriate Intimacy".
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,"Shotgun Surgery", that's another
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,favourite.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,And so, the problem with this list
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,– first of all, okay, I'll confess –
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I had that book for a really long time
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,before I read it. I had a really
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,hard time with it.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,It's one of those books that's
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,like a recipe book and I've heard
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,people who – it would be like reading
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,a cookbook if you did not eat.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,And so I really need the story
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,arc and I had very hard time
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,following along, like, persisting
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,with a bunch of recipes that were just
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,like etc., etc., etc.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,But it turns out
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,it was really worthwhile
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and I finally did it and actually
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Katrina made me. I have to say it.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Katrina made me.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,So there's 22 things on this list.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I had a Stack Overflow at 22.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,It turns out there's a guy who's name
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I can't pronounce – "Mäntylä" – it'll
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,be in the credits, he wrote a paper
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,where he grouped 'em. He grouped
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,'em in five different categories,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and through the magic of keynote,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I can do that.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,This is the only reason we make
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,talks, so we can use the effects.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,So here, let's just talk about
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,of things that just do not need
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,to be that big.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Long methods and large classes
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,are probably self-explanatory.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Data Clumps is where you have
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,two or more pieces of data that
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,always appear together; pass 'em
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,around and in together.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Long parameter list is obvious.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,It might only occur once, but if
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,it's long enough, there's probably an
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,object in there somewhere.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,And this other wonderfully named
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,thing called "Primitive Obsession", we saw
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,an example of that in the talk Katrina
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,just gave. This is like when you have
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,an instance of a base class
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,like a String, or a Number, or a Hash
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,or an Array, and you pass it
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,around to a bunch of objects
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and they look at it and decide on what
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,to do based on something that
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,they know about it.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,So you say, "I got a number,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,it's six so I'll do thing X" or
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,"it's eight, I'll do something else."
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,If only the thing you got was
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,smarter, you could just send
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,it messages, so Primitive Obsession
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,is when the objects are too dumb
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,that you're passing around.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,These things are grouped into
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,a category called "Bloaters".
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,They make code bigger than it needs to be
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,in the places where they use them.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,The next group, this one,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,these are ideas that are available in
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,object-oriented programming that you
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,can misuse.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Switch statements, you know they're
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,conditionals in normal people talk.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,"Refused Bequest" is when it's an
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,inheritance problem. You have a subclass
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,that overrides a method that it
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,inherits from a superclass, and
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,throws an exception and says
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,like "I don't implement that thing."
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,"I refuse the bequest."
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,"Alternative Classes with Alternative
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Interfaces" is pretty obvious.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,The other thing is the Temporary Field –
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,it's interesting that Temporary Field is
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,on this list, right? Temporary Fields can
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,be really handy, but sometimes
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,they mean that you should have
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,made a method with that name, right?
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Why are you giving it a name?
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,What is it about the code that you have
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,now that feels like it needs that name?
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,And so these things are all grouped
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,in a category that he called "Tool
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Abusers". I work on a lot of
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,bikes, I have a garage full of bikes
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and I'm an amateur mechanic
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,which means I have amateur tools
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,which sometimes involves a very short
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,wrench, a very long pipe, and a
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,hammer.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I can tell you that it almost always
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,turns out badly if you abuse your tools.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Alright, next. This group
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,this is stuff that makes change hard.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,So "Divergent Change", "Shotgun
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Surgery" – which we've talked about –
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,"Parallel Inheritance Heirarchies"
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,which is pretty obvious – sometimes
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,you have a couple of heirarchies
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,that each have two sides, and
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,every time you change something
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,you gotta go add or move
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,in both sides of the heirarchy.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,These are the kind of things
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,that keep you from wanting
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,to change code or make code
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,hard to change. Now, notice that
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,almost everything that I'm talking
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,about… if nothing ever changes,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,it's probably okay. Like, code that's
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,– really embarrasing code –
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,it's fine to keep that really embarrasing
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,code, you should be brave about
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,your ugly, embarrasing code
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,because it is not costing you money
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,if it's not changing. And so,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,just because these smells exist,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,you know, sometimes you should
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,just, like, own 'em. Be proud.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Walk away.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Don't let people make fun of you
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,for having bad code.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,This next category…
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,"Lazy Class", "Speculative Generality" –
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,okay, on top of the effects
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,finding the pictures is also fun –
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,classes that don't do enough is a
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,lazy class, it doesn't justify its
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,existence. I'm going to skip Speculative
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Generality for a minute. Data Class,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,you know, we're object-oriented
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,programmers, classes oughta have data
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and behaviour. Duplicated Code is
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,pretty obvious. Let me go back to
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Speculative Generality.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I'm going to ask you to raise your hands
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,again. Who in here has ever
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,written some code for a feature you
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,thought might arrive in the future.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Keep your hands up for a minute.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Alright, I'm going to out myself
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,with you here.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Who in here has ever, after many
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,months of working around that code
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,ripped it out and thrown it
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,away? {\i1}chuckles{\i0} Yeah, okay.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,We are bad guessers, and
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,you know, I love OO,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I love object-oriented design,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,it's a thing that really interests me,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,but this thing of Speculative Generality,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,where we say, I'm going to do something
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,really cool in my code for some feature
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I {\i1}think{\i0} we might need later…
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,this is why people say bad things
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,about OO. Right? This is what
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,they blame us for. It's primarily
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,things in that category.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,You have to be right. The few times
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,that you are right have to {\i1}really{\i0}
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,be big wins that way the enormous
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,cost of being wrong – code is read
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,many more times than it is written.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,The reason why we cost money
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,is the time spent reading code.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,And if you add generality, you
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,increase the level of abstraction
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,of code. Very often that means
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,adding levels of indirection
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,which humans are terrible at
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and every time you look at that code
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,it means its harder to understand.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,So we should really try to
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,restrain ourselves, and not speculate
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,about the future. When the new
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,requirements come in, they'll tell us
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,how we wish we'd written the code
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and we can do it then.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Dispensables. Sorry, here.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Ah, see I did that thing with the clicker!
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Dispensables, okay, you've all
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,seen that now so we'll move on.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,So the last category here is this group.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,"Feature Envy", "Inappropriate Intimacy",
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,"Message Chains", and "Middle Man".
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Feature Envy is when I have an object
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,uh, Joe down here is an object,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Joe's an object that I know about
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and I send him way more messages
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,than I send myself. Could be
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,that I'm more tightly coupled to
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Joe than I know, right?
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Inappropriate Intimacy would be
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,when Joe had a bunch of private
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,methods and I reached in and
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,got them, okay, that would be bad.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,{\i1}laughs{\i0} I really am sorta pushing
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,the code of conduct, aren't I?
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I hope no-one was made uncomfortable
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,by that. Message Chains – there's
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,the Law of Demeter, those violations
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,right? You got dots. You send
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,messages to something you know about
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and you get a response and you send
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,a message to that. If the types
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,change across those dot changes
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,that's a Message Chain.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Middle Man is if you have
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,an object that you send messages to
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and it's sole purpose in life is to
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,forward those messages to somebody else
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,maybe you don't need that object.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,These things are grouped together
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,in a group called "Couplers"
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,because the effect of this
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,is that it binds the objects together
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,such that even if they're
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,beautiful, even if you've tested
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,'em, even if they're little
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,works of art, you can't ever
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,reach in and get one out
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and use it in another context.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,They come as a bundle, all or nothing.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,And so there you go.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,10 minutes and 34 seconds
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,everything you need to know about
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,code smells.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Okay, but we're not done.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Now I'm going to talk about refactoring
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,but not very much
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,because you just heard a talk
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,on refactoring.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,But there's a thing here
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,that people don't know,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,that those guys discovered in the 90s,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,that I want you to go away today
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,understanding, and it's this:
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,refactorings, just like code smells have
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,names and they mean very specific
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,things, refactorings have names
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,they're very specific, and they
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,come with recipes. Not hand-wavy
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,recipes, very, very specific, concrete
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,recipes. Here's one.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,This is page 149 of Martin Fowler's
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,book, and it looks like a recipe, right?
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,It has numbers down the side.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,There's little optional clauses here
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,for situations that might be different in
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,your case. You notice that it refers
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,to other recipes, here where the
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,things are in capital letters, that's
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,another whole recipe by itself.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,It's recipes and recipes
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,within recipes.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,All of the refactorings work in the
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,same way. This is not something –
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,we don't wave our hands and say
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,"go refactor" – refactoring has a
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,very specific definition, it's to
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,rearrange code without changing its
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,behaviour and all the ways
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,in which you can rearrange code are
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,already written down, with instructions
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,by people who really thought a lot
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,about this. And so now you know
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,code smells have names, and they're
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,real things, and refactorings have names
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and they're real things, and they
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,come with recipes. I can give you
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,one last bit of news. Every code smell
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,maps to the Curative Refactoring Recipe.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Ponder that for a minute.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,What does that mean?
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Here's a cheat sheet. This one's
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,provided by the guys at Industrial
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Logic. Notice at the top that the code
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,smell they're talking about is Data
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Clumps. This is a little tiny definition
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,of a Data Clump. "[F 81]" is a
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,reference to page 81 in Martin
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Fowler's book. The three things
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,on the bottom are the
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,refactoring recipes that are curative
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,for that code smell.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,So this slide, I just blew it up
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,so you could see it,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I just extracted it from this PDF
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,which is a couple pages long. It
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,cross-references all the code smells
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and refactorings in Martin Fowler's
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,book and also a book by
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,another guy named Joshua Kerievsky
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,called {\i1}Refactoring to Patterns.{\i0}
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,It turns out that this is all
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,you need to know. The problem
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,is solved. You do not have to
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,reinvent this wheel.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,All you need to know is a few things.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,And many of you –
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,at least, my experience –
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,the reason I wanted to give this talk
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,from my experience teaching is
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,somehow a generation has passed
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,since all these books were written, and
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,that people new to programming
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,in the last 15 years –
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I'm a woman of a certain age,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,you can tell –
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,if you're new in the last 15 years
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,you may not have this information.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I'm going to show you some code now.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I'm going to use the last 15-20 minutes
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,looking at code, and I'm going to
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,show you the practical effect of
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,recognizing code smells and doing
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,refactorings.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,My class Sale is a subclass of
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Persistence. You can think of that as
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,ActiveRecord. If you're in the back it
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,won't hurt my feelings if you get up
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and come forward – that's the font
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,size of my code.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I didn't know I was gonna be in the
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,keynote, man, it just happened.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Let's say I have my class Foo that has
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,a sales_total method, takes some params,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and maybe this a controller-like thing
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,or something that a controller calls.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,It knows the name of the Sale class and
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,it knows some other things, right?
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,It knows that Sale understands where
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and it knows that the thing that comes
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,back as a response from sending the where
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,message knows sum.