- Variables 4:48
- Variables and Methods 4 objectives
- Attribute Readers 1:46
- Attribute Readers 1 objective
- Attribute Writers and Accessors 5:20
- Attribute Writers and Accessors 2 objectives
- Methods 3:31
- Methods 1 objective
- Instance Variables and Local Variables 4:54
- Instance Variables and Local Variables 4 questions
- The to_s method 2:16
- The to_s Method 1 objective
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Attribute Readers
1:46An attribute reader allows us to access variables in a class from outside that class. This is normally code we would have to write ourselves but Ruby gives us a shortcut in the form of an attribute reader.
Now that we know how to create and send in
attributes when working on a class,
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let's go ahead and fix up our name class
with the different name attributes.
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Now this pattern that we see right here,
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where we are setting instance variables,
and then calling them later.
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It's something that's done quite a bit in
Ruby.
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And Ruby actually gives us a shortcut for
doing this exact thing.
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The shortcut is using a method called
attr_reader which stands for
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attribute reader.
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Now let's try it right here.
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When we set the attribute reader as a
title,
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we can go down to the Title Method and
take this out.
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Now, if we run this program again, we
should see the same thing printed.
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And we do.
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When we call the attr_reader method,
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Ruby is actually writing this method for
us.
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It takes the name that we send in.
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Which in this case is title.
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And actually creates this method.
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Which just returns the variable.
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So we can go ahead and do that for all of
our different named attributes.
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Now our class just looks like this.
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And let's go ahead and
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run it and just make sure that everything
is printed out the same way again.
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And it works exactly as we expect it to.
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