Scala example source code file (ArrayLike.scala)

This example Scala source code file (ArrayLike.scala) is included in my "Source Code Warehouse" project. The intent of this project is to help you more easily find Scala source code examples by using tags.

All credit for the original source code belongs to scala-lang.org; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Scala tags/keywords

any, anyref, array, arraylike, indexedseqoptimized, int, repr

The ArrayLike.scala Scala example source code

/*                     __                                               *\
**     ________ ___   / /  ___     Scala API                            **
**    / __/ __// _ | / /  / _ |    (c) 2003-2013, LAMP/EPFL             **
**  __\ \/ /__/ __ |/ /__/ __ |    http://scala-lang.org/               **
** /____/\___/_/ |_/____/_/ | |                                         **
**                          |/                                          **
\*                                                                      */

package scala
package collection
package mutable

/** A common supertrait of `ArrayOps` and `WrappedArray` that factors out the 
 * `deep` method for arrays and wrapped arrays and serves as a marker trait
 * for array wrappers.
 *
 *  @tparam A     type of the elements contained in the array like object.
 *  @tparam Repr  the type of the actual collection containing the elements.
 *
 *  @define Coll `ArrayLike`
 *  @version 2.8
 *  @since   2.8
 */
trait ArrayLike[A, +Repr] extends Any with IndexedSeqOptimized[A, Repr] { self =>

  /** Creates a possible nested `IndexedSeq` which consists of all the elements
   *  of this array. If the elements are arrays themselves, the `deep` transformation
   *  is applied recursively to them. The `stringPrefix` of the `IndexedSeq` is
   *  "Array", hence the `IndexedSeq` prints like an array with all its
   *  elements shown, and the same recursively for any subarrays.
   *
   *  Example:
   *  {{{
   *  Array(Array(1, 2), Array(3, 4)).deep.toString
   *  }}}
   *  prints: `Array(Array(1, 2), Array(3, 4))`
   *
   *  @return    An possibly nested indexed sequence of consisting of all the elements of the array.
   */
  def deep: scala.collection.IndexedSeq[Any] = new scala.collection.AbstractSeq[Any] with scala.collection.IndexedSeq[Any] {
    def length = self.length
    def apply(idx: Int): Any = self.apply(idx) match {
      case x: AnyRef if x.getClass.isArray => WrappedArray.make(x).deep
      case x => x
    }
    override def stringPrefix = "Array"
  }
}