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defmodule User do
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defstruct name: "john", age: 27
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end
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john = %User{} #=> %User{age: 27, name: "john"}
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john.name #=> "john"
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%User{age: age} = john # pattern matching
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age #=> 27
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meg = %User{name: "meg"} #=> %User{age: 27, name: "meg"}
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is_map(meg) #=> true
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