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    Chapter 12. The Scala Type System > Infinite Data Structures and Laziness

    12.12. Infinite Data Structures and Laziness

    We described lazy values in Chapter 8. In functional languages that are lazy by default, like Haskell, laziness makes it easy to support infinite data structures.

    For example, consider the following Scala method fib that calculates the Fibonacci number for n in the infinite Fibonacci sequence:


      

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