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delor/named_arguments.scala

Created August 20, 2013 13:41
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Watch out when overwriting methods and changing parameter name in Scala.
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named_arguments.scala
scala> trait Person { def grade(years: Int): String }
defined trait Person
scala> class SalesPerson extends Person { def grade(yrs: Int) = "Senior" }
defined class SalesPerson
scala> val s = new SalesPerson
s: SalesPerson = SalesPerson@3ce89cd5
scala> s.grade(yrs=1)
res0: String = Senior
scala> s.grade(years=1)
<console>:11: error: not found: value years
s.grade(years=1)
^
scala> val p: Person = new SalesPerson
p: Person = SalesPerson@2709f770
scala> p.grade(years=1)
res2: String = Senior
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