#collections #lists #scala
All lists can be defined using two fundamental building blocks, a tail Nil and ::, which is pronounced cons. Nil also represents the empty list. All the above lists can be defined as follows:
// List of Strings
val fruit = "apples" :: ("oranges" :: ("pears" :: Nil))
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Scala Listst;)
// List of Integers
val nums: List[Int] = List(1, 2, 3, 4)
// Empty List.
val empty: List[Nothing] = List()
// Two dimensional list
val dim: List[List[Int]] =
List(
List(1, 0, 0),
List(0, 1, 0),
List(0, 0, 1)
)
<span>All lists can be defined using two fundamental building blocks, a tail Nil and ::, which is pronounced cons. Nil also represents the empty list. All the above lists can be defined as follows:
// List of Strings
val fruit = "apples" :: ("oranges" :: ("pears" :: Nil))
// List of Integers
val nums = 1 :: (2 :: (3 :: (4 :: Nil)))
// Empty List.
val empty = Nil
// Two dimensional list
val dim = (1 :: (0 :: (0 :: Nil))) ::
(0 :: (1 :: (0 :: Ni Summary
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