Proper Scala syntax to turn higher-order function into anonymous function?

Question

I would like to eliminate the inverse function in the example below and just create an anonymous function directly in the call to bar . Can anyone suggest the correct syntax? I've tried a few variations but can't get anything to compile.

object Test {

  def foo(p: Int => Boolean): Boolean = {
    def inverse(p: Int => Boolean): Int => Boolean = {
      e: Int => !p(e)
    }

    bar(inverse(p))
  }

  def bar(p: Int => Boolean): Boolean = true

}

Answer 1

This should work

bar(!p(_))

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