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Null object: Difference between revisions
Scala.
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(Scala.) |
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Line 755:
<lang ruby>
puts "object is null" if object.nil?
</lang>
=={{header|Scala}}==
[http://blog.sanaulla.info/2009/07/12/nothingness/ This blog post] has a good explanations of the different types of null-like values.
<lang scala>
scala> Nil
res0: scala.collection.immutable.Nil.type = List()
scala> Nil == List()
res1: Boolean = true
scala> Null
<console>:8: error: not found: value Null
Null
^
scala> null
res3: Null = null
scala> None
res4: None.type = None
scala> Unit
res5: Unit.type = object scala.Unit
scala> val a = println()
a: Unit = ()
</lang>
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