In response to Slack post "Please explain why Doubles work this way"

why-doubles.scala

// In response to Slack post "Please explain why Doubles work this way"
//
// For doubles...
//     1.001484375 - 1 = 0.0014843749999999822
//     0.001484375 + 1 = 1.001484375
//
// To run, start the repl with `sbt console`, then paste all this in
//
import java.lang.Double.doubleToRawLongBits
import java.lang.Long.{toBinaryString, toHexString}

val l1 = List[Double](
  1,
  1.001484375,
  1.001484375 - 1,
  0.001484375,
  0.001484375 + 1)

val l2 = l1.map(doubleToRawLongBits)
val l3 = l2.map(toHexString)
val l4 = l2.map(toBinaryString)

List(l1, l2, l3, l4).foreach(_.foreach(println _))