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29 lines
794 B
Markdown
29 lines
794 B
Markdown
# Define A Method On A Struct
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When defining a Ruby `Struct`, you can optionally pass it a block that defines
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any number of methods as instance methods on that `Struct`. They can reference
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the attributes of the `Struct`.
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Here is an example of a person `Struct` with a `full_name` method that uses the
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`first_name` and `last_name` attributes.
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```ruby
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Person = Struct.new(:first_name, :last_name, :age) do
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def full_name
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"#{first_name} #{last_name}"
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end
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end
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```
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This `Struct` can be used like so:
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```ruby
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> liz = Person.new("Liz", "Lemon", 39)
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=> #<struct Person first_name="Liz", last_name="Lemon", age=39>
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> liz.full_name
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=> "Liz Lemon"
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```
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This is a great way to make a `Struct` just a bit more powerful without having
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to convert it into a full-blown PORO (plain old Ruby object).
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