every function in scala is an instance of a class

Created by Wang, Jerry, last modified on Jan 11, 2016

object MainFunction0Test extends App {
val suc = (x:Int)=> x + 1
val sud = new Function1[Int, Int] {
def apply(x:Int): Int = x + 1
}
assert(suc(0) == sud(0))
}

myInt即为形参。
another way:

Since in Scala you can use type inference you don’t have to declare the type so the following would be equivalent:

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