Exercise 5.2: Use underscore placeholder

ptrba · Jan 4, 2015 · 17de80c · 17de80c
1 parent 4e57243
commit 17de80c
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diff --git a/answerkey/laziness/02.answer.scala b/answerkey/laziness/02.answer.scala
@@ -15,7 +15,7 @@ answer lazily. It must traverse the first `n` elements of the stream eagerly.
 */
 @annotation.tailrec
 final def drop(n: Int): Stream[A] = this match {
-  case Cons(h, t) if n > 0 => t().drop(n - 1)
+  case Cons(_, t) if n > 0 => t().drop(n - 1)
   case _ => this
 }
 
diff --git a/answers/src/main/scala/fpinscala/laziness/Stream.scala b/answers/src/main/scala/fpinscala/laziness/Stream.scala
@@ -61,7 +61,7 @@ trait Stream[+A] {
   */
   @annotation.tailrec
   final def drop(n: Int): Stream[A] = this match {
-    case Cons(h, t) if n > 0 => t().drop(n - 1)
+    case Cons(_, t) if n > 0 => t().drop(n - 1)
     case _ => this
   }