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Asked: 2026-05-22T00:39:37+00:00

In Scala, is there any difference at all between Nil and List() ? If

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In Scala, is there any difference at all between Nil and List()?

If not, which one is more idiomatic Scala style? Both for creating new empty lists and pattern matching on empty lists.

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1 Answer

  1. Editorial Team
    scala> println (Nil == List())
true

scala> println (Nil eq List())
true

scala> println (Nil equals List())
true

scala> System.identityHashCode(Nil)
374527572

scala> System.identityHashCode(List())
374527572

    Nil is more idiomatic and can be preferred in most cases.
    Questions?

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