blob: 4f7a941f518dd50d2d7f4a76f47bf086cb7e86cb (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
package scalam.collection
import scala.collection.mutable.IndexedSeq
import breeze.linalg.DenseVector
import scala.collection.mutable.Builder
import scala.collection.generic.CanBuildFrom
import scala.collection.mutable.ArrayBuffer
import scala.reflect.ClassTag
/**
* This class serves as a wrapper augmenting `breeze.linalg.DenseVector`s with all the operations
* found in indexed sequences.
*
* The difference between this class and `DenseVectorOps` is that calling transformer
* methods such as `filter` and `map` will yield an object of type `WrappedDenseVector`
* rather than a `DenseVector`.
*
* @see [[scala.collection.mutable.WrappedArray]]
*
* @tparam Elem type of the elements contained in this WrappedDenseVector.
*
* @param self a dense vector contained within this wrapped dense vector
*
* @define Coll `DenseVector`
* @define coll dense vector
*/
class WrappedDenseVector[Elem: ClassTag](val self: DenseVector[Elem]) extends IndexedSeq[Elem] with DenseVectorLike[Elem, WrappedDenseVector[Elem]] {
override protected[this] def newBuilder: Builder[Elem, WrappedDenseVector[Elem]] = WrappedDenseVector.newBuilder[Elem]
}
/**
* A companion object for wrapped dense vectors.
*/
object WrappedDenseVector {
def newBuilder[Elem: ClassTag] = (new ArrayBuffer[Elem]) mapResult (x => new WrappedDenseVector(DenseVector(x.toArray)))
implicit def canBuildFrom[T: ClassTag] = new CanBuildFrom[WrappedDenseVector[_], T, WrappedDenseVector[T]] {
def apply(from: WrappedDenseVector[_]): Builder[T, WrappedDenseVector[T]] = newBuilder[T]
def apply: Builder[T, WrappedDenseVector[T]] = newBuilder[T]
}
}
|
