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

}

I don't know scala, but what about bar((e:Int) => !p(e))? Edit: err, didn't read the code good enough — ReyCharles
– ReyCharles, Commented Oct 4, 2012 at 7:50

sourcedelica · Accepted Answer · 2012-10-04 10:39:43Z

13

This should work

bar(!p(_))

stackoverflow says this answer is too short.

edited Oct 4, 2012 at 10:39

sourcedelica

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answered Oct 4, 2012 at 7:49

Jens Schauder

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