hakobe (owner)

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gist: 146923 Download_button fork
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contra_variant.scala #
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class Applyer[-A, +B]( f :(A => B)) {
    def apply(x:A) :B = {
        this.f(x)
    }
}
 
val a = new Applyer[String, int]( {x :AnyRef => x.hashCode} )
println(
    a.apply("hello")
)