- Contact Class: Part 1 6:05
- Create a Contact Class 1 objective
- Contact Class: Part 2 4:04
- Write a Method 1 objective
- Phone Number Class 6:15
- Write a to_s Method 1 objective
- Address Class: Part 1 5:00
- Address Class: Part 2 3:44
- Initializing and Calling Methods 2 objectives
- Address Book Class 4:25
- Instance variable instantiation 2 objectives
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Address Class: Part 1
5:00Contacts are going to have both phone numbers and addresses. In this video, we're going to define the `to_s` method on the address class and have it be able to take a formatting argument.
Now that our contact class is all set up,
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we can start working on
the other parts of the program.
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Since they're not quite
addressed by built in classes,
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we're going to have to write our own.
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Get it?
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Addressed?
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It's a bad pun about addresses.
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Anyway, we'll be writing
our own address class now
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in addition to another supporting
class for our program.
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Let's get to it using workspaces.
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So our contacts have phone numbers.
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Now let's go ahead and
have addresses for our contacts as well.
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Now we can do that by creating
another class for an address.
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So we'll go ahead and create a new file,
you can do that by right clicking and
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selecting new file on the side bar,
or go file and new file.
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And we will call this address.rb.
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So now we can create our address class.
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And addresses are gonna be
similar to phone numbers.
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They can have a street with potentially
two lines and then a city, state, and
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postal code.
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Now, we also wanna know
what kind of address it is.
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So, we'll put that in there
as an attribute as well.
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So we'll have the kind,
the first line of the street address,
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second line of the street address,
the city, state, and postal code.
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Now just like with phone numbers, let's
go ahead and override the to_s method.
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Except there are two different ways that
we may wanna be formatting addresses.
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So we can use that pattern that we
used earlier with contacts, and
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we'll say the format that we want
by default is going to be short.
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So now we can look at the format.
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And let's go ahead and
create a little string here,
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to hold our address,
which we will implicitly return.
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Now when we're using the short format,
we will add on the kind of address,
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so we will say home, colon and
then the street address all on one line.
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That will be the first line
of the street address.
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And then we can say,
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if there is a second line.
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We'll add a space to this string
because remember it's all on one line.
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And then the street two attribute and
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then we can return the comma and
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the city, state and postal code.
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And let's just go ahead and print that
out real quick, and make sure it works.
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This is not my real home address.
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And let's just go ahead and
print that out using the short format.
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So now we'll run this very quickly and
make sure it works.
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And type ruby address.rb.
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Okay, that looks good, and let's go ahead
and create the long format as well.
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So when the argument that we send
in to this to_s method is long,
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we will say it is the street_1
variable plus a new line.
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[NOISE] And then we can also say,
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here is the street two variable.
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Plus a new line.
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And remember we can put if statements
all on the same line if we want to.
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So we'll just say we'll add on to the
address variable the street two variable,
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and a new line if street two is not nil,
and
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then we could also add on the city,
state and postal_code.
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Now let's just go ahead and
print a new line here.
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And print it out in
the long format as well.
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Okay, that looks good.
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We've got our home address printed in
the short format and in the long format.
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In our next video,
we'll add this back to the contact class.
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