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author | Martin Odersky <odersky@gmail.com> | 2009-10-16 15:38:40 +0000 |
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committer | Martin Odersky <odersky@gmail.com> | 2009-10-16 15:38:40 +0000 |
commit | 136c1cce62ab8a35d7f0a515d7456fe4764611c3 (patch) | |
tree | 8dd0f923e82158ea72f5ccd997bd96dba8185c7c /src/library/scala/collection/TraversableLike.scala | |
parent | 8ce658f6653bc6fedb7c7f43f9e307fe55847297 (diff) | |
download | scala-136c1cce62ab8a35d7f0a515d7456fe4764611c3.tar.gz scala-136c1cce62ab8a35d7f0a515d7456fe4764611c3.tar.bz2 scala-136c1cce62ab8a35d7f0a515d7456fe4764611c3.zip |
moved Range and GenericRange to collection.immu...
moved Range and GenericRange to collection.immutable, with alias for
Range in scala package object; made Range strict. moved from filter to
withFilter in translation for for expressions.
Diffstat (limited to 'src/library/scala/collection/TraversableLike.scala')
-rw-r--r-- | src/library/scala/collection/TraversableLike.scala | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/src/library/scala/collection/TraversableLike.scala b/src/library/scala/collection/TraversableLike.scala index 9f4bdbac7f..2716956cb9 100644 --- a/src/library/scala/collection/TraversableLike.scala +++ b/src/library/scala/collection/TraversableLike.scala @@ -826,4 +826,30 @@ self => * @note view(from, to) is equivalent to view.slice(from, to) */ def view(from: Int, until: Int): TraversableView[A, Repr] = view.slice(from, until) + + class WithFilter(p: A => Boolean) { + + def map[B, That](f: A => B)(implicit bf: BuilderFactory[B, That, Repr]): That = { + val b = bf(repr) + for (x <- self) + if (p(x)) b += f(x) + b.result + } + + def flatMap[B, That](f: A => Traversable[B])(implicit bf: BuilderFactory[B, That, Repr]): That = { + val b = bf(repr) + for (x <- self) + if (p(x)) b ++= f(x) + b.result + } + + def foreach[U](f: A => U): Unit = + for (x <- self) + if (p(x)) f(x) + + def withFilter(q: A => Boolean): WithFilter = + new WithFilter(x => p(x) && q(x)) + } + + def withFilter(p: A => Boolean): WithFilter = new WithFilter(p) } |