/* * Copyright (C) 2007-2020 Artima, Inc. All rights reserved. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * * Automatically generated Scala interpreter transcript from: * * Programming in Scala (Fifth Edition) * by Martin Odersky, Lex Spoon, Bill Venners, and Frank Sommers * * http://booksites.artima.com/programming_in_scala_5ed */ scala> val List(a, b, c) = fruit ^ error: not found: value fruit scala> val a :: b :: rest = fruit ^ error: not found: value fruit scala> List(1, 2, 3).flatten ^ error: No implicit view available from Int => scala.collection.IterableOnce[B]. scala> var sum = 0 sum: Int = 0 scala> List(1, 2, 3, 4, 5).foreach(sum += _) scala> sum res2: Int = 15 scala> def flattenLeft[T](xss: List[List[T]]) = xss.foldLeft(List[T]())(_ ::: _) def flattenRight[T](xss: List[List[T]]) = xss.foldRight(List[T]())(_ ::: _) flattenLeft: [T](xss: List[List[T]])List[T] flattenRight: [T](xss: List[List[T]])List[T] scala> def flattenRight[T](xss: List[List[T]]) = xss.foldRight(List())(_ ::: _) xss.foldRight(List())(_ ::: _) ^ On line 2: error: type mismatch; found : List[T] required: List[Nothing] scala> msort(less)(xs) ^ error: not found: value msort ^ error: not found: value less ^ error: not found: value xs