[Solved] Retrieve numbers before/after sign change in [Double]

by 


([60, 21, -18, -57, -95, -67, -29, 8, 45, 82] as [Double])
  .consecutivePairs
  .filter { $0.sign != $1.sign }

public extension Sequence {
  /// Each element of the sequence, paired with the element after.
  var consecutivePairs: Zip2Sequence<Self, DropFirstSequence<Self>> {
    zip(self, dropFirst())
  }
}

solved Retrieve numbers before/after sign change in [Double]