johnduffell

package fpinscala

object Test {
  sealed trait Number


  sealed trait Positive extends Number
  case object Zero extends Positive with Negative
  case class Succ[P <: Positive](prev: P) extends Positive

johnduffell

val danger = "YIKES!"
val secret = "hui840"

johnduffell

val autoInterpolated = s"problem occurred $danger, id: $secret"

=> autoInterpolated: String = problem occurred YIKES!, id: hui840

johnduffell

val manualInterpolated =
  StringContext(
    "problem occurred ", ", id: ", ""
  ).s(
    danger, secret
  )

johnduffell

case class Scrubbed(danger: String, safe: String) {
  override val toString = safe
}

implicit class Scrubber(val sc: StringContext) extends AnyVal {

  def scrub(args: Any*): Scrubbed = {
    Scrubbed(
      sc.s(args: _*),
      sc.s(args.map(_ => "*****"): _*)

johnduffell

val scrubbed = scrub"problem occurred $danger, id: $secret"

=> scrubbed: Scrubbed = problem occurred *****, id: *****

johnduffell

val safeLogLine = scrubbed.safe
val secretLogLine = scrubbed.danger

safeLogLine: String = problem occurred *****, id: *****
secretLogLine: String = problem occurred YIKES!, id: hui840

johnduffell

var publicKey = postman.getEnvironmentVariable('apple-news-keyId') || '';
var secretKey = postman.getEnvironmentVariable('apple-news-keySecret') || '';

const decodedKey = CryptoJS.enc.Base64.parse(secretKey)

const date = (new Date()).toISOString().split('.')[0]+"Z";
var sign = "GET" + request.url + "" + date;
const hmacDigest = CryptoJS.enc.Base64.stringify(CryptoJS.HmacSHA256(sign, decodedKey));
postman.setGlobalVariable("hmac", "HHMAC; key=" + publicKey + "; signature=" + hmacDigest + "; date=" + date);