object O {
def main(args: Array[String]): Unit = {
var lst = List("SCALA", "JAVA", "C++", "SWIFT", "C++", "C++", "SCALA", "SCALA")
lst = lst.map(_.toLowerCase()).distinct
println(lst)
for (element <- lst)
println(element)
}
}
/*
run:
List(scala, java, c++, swift)
scala
java
c++
swift
*/