Class

com.github.andyglow.tree.Util

ConcatIterator

Related Doc: package Util

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class ConcatIterator[T] extends Iterator[T]

Basically a fast, efficient .flatten or mkString for nested iterators

For some reason, the default way of concatenation e.g.

val middle = first ++ lastChildIter ++ sep ++ remaining

Was throwing weird NullPointerExceptions I couldn't figure out =(

Also, ++ didn't seem to be sufficiently lazy, so it was forcing things earlier than it really needed to. It isn't documented anywhere how lazy it's meant to be, whereas ConcatIterator here is obviously lazy and won't even evaluate each iterator until you ask it to

Linear Supertypes
Iterator[T], TraversableOnce[T], GenTraversableOnce[T], AnyRef, Any
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Inherited
  1. ConcatIterator
  2. Iterator
  3. TraversableOnce
  4. GenTraversableOnce
  5. AnyRef
  6. Any
Implicitly
  1. by MonadOps
  2. by any2stringadd
  3. by StringFormat
  4. by Ensuring
  5. by ArrowAssoc
  6. by alternateImplicit
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Visibility
  1. Public
  2. All

Instance Constructors

  1. new ConcatIterator(it0: Iterator[Iterator[T]], joiner: () ⇒ Iterator[T])

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Type Members

  1. class GroupedIterator[B >: A] extends AbstractIterator[Seq[B]] with Iterator[Seq[B]]

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    Definition Classes
    Iterator

Value Members

  1. final def !=(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any

  2. final def ##(): Int

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    Definition Classes
    AnyRef → Any

  3. def +(other: String): String

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    Implicit information
    This member is added by an implicit conversion from ConcatIterator[T] to any2stringadd[ConcatIterator[T]] performed by method any2stringadd in scala.Predef.
    Definition Classes
    any2stringadd

  4. def ++[B >: T](that: ⇒ GenTraversableOnce[B]): Iterator[B]

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    Definition Classes
    Iterator

  5. def ->[B](y: B): (ConcatIterator[T], B)

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    Implicit information
    This member is added by an implicit conversion from ConcatIterator[T] to ArrowAssoc[ConcatIterator[T]] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()

  6. def /:[B](z: B)(op: (B, T) ⇒ B): B

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  7. def :\[B](z: B)(op: (T, B) ⇒ B): B

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  8. final def ==(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any

  9. def addString(b: StringBuilder): StringBuilder

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    Definition Classes
    TraversableOnce

  10. def addString(b: StringBuilder, sep: String): StringBuilder

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    Definition Classes
    TraversableOnce

  11. def addString(b: StringBuilder, start: String, sep: String, end: String): StringBuilder

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    Definition Classes
    TraversableOnce

  12. def aggregate[B](z: ⇒ B)(seqop: (B, T) ⇒ B, combop: (B, B) ⇒ B): B

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  13. final def asInstanceOf[T0]: T0

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    Definition Classes
    Any

  14. def buffered: BufferedIterator[T]

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    Definition Classes
    Iterator

  15. def clone(): AnyRef

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @IntrinsicCandidate() @throws( ... )

  16. def collect[B](pf: PartialFunction[T, B]): Iterator[B]

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    Definition Classes
    Iterator
    Annotations
    @migration
    Migration

    (Changed in version 2.8.0) collect has changed. The previous behavior can be reproduced with toSeq.

  17. def collectFirst[B](pf: PartialFunction[T, B]): Option[B]

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    Definition Classes
    TraversableOnce

  18. def contains(elem: Any): Boolean

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    Definition Classes
    Iterator

  19. def copyToArray[B >: T](xs: Array[B], start: Int, len: Int): Unit

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    Definition Classes
    Iterator → TraversableOnce → GenTraversableOnce

  20. def copyToArray[B >: T](xs: Array[B]): Unit

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  21. def copyToArray[B >: T](xs: Array[B], start: Int): Unit

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  22. def copyToBuffer[B >: T](dest: Buffer[B]): Unit

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    Definition Classes
    TraversableOnce

  23. def corresponds[B](that: GenTraversableOnce[B])(p: (T, B) ⇒ Boolean): Boolean

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    Definition Classes
    Iterator

  24. def count(p: (T) ⇒ Boolean): Int

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  25. var count: Int

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  26. def drop(n: Int): Iterator[T]

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    Definition Classes
    Iterator

  27. def dropWhile(p: (T) ⇒ Boolean): Iterator[T]

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    Definition Classes
    Iterator

  28. def duplicate: (Iterator[T], Iterator[T])

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    Definition Classes
    Iterator

  29. def ensuring(cond: (ConcatIterator[T]) ⇒ Boolean, msg: ⇒ Any): ConcatIterator[T]

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    Implicit information
    This member is added by an implicit conversion from ConcatIterator[T] to Ensuring[ConcatIterator[T]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring

  30. def ensuring(cond: (ConcatIterator[T]) ⇒ Boolean): ConcatIterator[T]

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    Implicit information
    This member is added by an implicit conversion from ConcatIterator[T] to Ensuring[ConcatIterator[T]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring

  31. def ensuring(cond: Boolean, msg: ⇒ Any): ConcatIterator[T]

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    Implicit information
    This member is added by an implicit conversion from ConcatIterator[T] to Ensuring[ConcatIterator[T]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring

  32. def ensuring(cond: Boolean): ConcatIterator[T]

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    Implicit information
    This member is added by an implicit conversion from ConcatIterator[T] to Ensuring[ConcatIterator[T]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring

  33. final def eq(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef

  34. def equals(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any

  35. def exists(p: (T) ⇒ Boolean): Boolean

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    Definition Classes
    Iterator → TraversableOnce → GenTraversableOnce

  36. def filter(p: (T) ⇒ Boolean): Iterator[T]

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    Definition Classes
    Iterator

  37. def filterNot(p: (T) ⇒ Boolean): Iterator[T]

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    Definition Classes
    Iterator

  38. def find(p: (T) ⇒ Boolean): Option[T]

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    Definition Classes
    Iterator → TraversableOnce → GenTraversableOnce

  39. def flatMap[B](f: (T) ⇒ GenTraversableOnce[B]): Iterator[B]

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    Definition Classes
    Iterator

  40. def fold[A1 >: T](z: A1)(op: (A1, A1) ⇒ A1): A1

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  41. def foldLeft[B](z: B)(op: (B, T) ⇒ B): B

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  42. def foldRight[B](z: B)(op: (T, B) ⇒ B): B

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  43. def forall(p: (T) ⇒ Boolean): Boolean

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    Definition Classes
    Iterator → TraversableOnce → GenTraversableOnce

  44. def foreach[U](f: (T) ⇒ U): Unit

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    Definition Classes
    Iterator → TraversableOnce → GenTraversableOnce

  45. def formatted(fmtstr: String): String

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    Implicit information
    This member is added by an implicit conversion from ConcatIterator[T] to StringFormat[ConcatIterator[T]] performed by method StringFormat in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @inline()

  46. final def getClass(): Class[_]

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    Definition Classes
    AnyRef → Any
    Annotations
    @IntrinsicCandidate()

  47. def grouped[B >: T](size: Int): GroupedIterator[B]

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    Definition Classes
    Iterator

  48. def hasDefiniteSize: Boolean

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    Definition Classes
    Iterator → TraversableOnce → GenTraversableOnce

  49. def hasNext: Boolean

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    Definition Classes
    ConcatIterator → Iterator

  50. def hashCode(): Int

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    Definition Classes
    AnyRef → Any
    Annotations
    @IntrinsicCandidate()

  51. var head: Iterator[T]

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  52. def indexOf[B >: T](elem: B): Int

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    Definition Classes
    Iterator

  53. def indexWhere(p: (T) ⇒ Boolean): Int

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    Definition Classes
    Iterator

  54. def isEmpty: Boolean

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    Definition Classes
    Iterator → TraversableOnce → GenTraversableOnce

  55. final def isInstanceOf[T0]: Boolean

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    Definition Classes
    Any

  56. def isTraversableAgain: Boolean

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    Definition Classes
    Iterator → GenTraversableOnce

  57. def length: Int

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    Definition Classes
    Iterator

  58. def map[B](f: (T) ⇒ B): Iterator[B]

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    Definition Classes
    Iterator

  59. def max[B >: T](implicit cmp: Ordering[B]): T

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  60. def maxBy[B](f: (T) ⇒ B)(implicit cmp: Ordering[B]): T

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  61. def min[B >: T](implicit cmp: Ordering[B]): T

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  62. def minBy[B](f: (T) ⇒ B)(implicit cmp: Ordering[B]): T

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  63. def mkString: String

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  64. def mkString(sep: String): String

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  65. def mkString(start: String, sep: String, end: String): String

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  66. final def ne(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef

  67. def next(): T

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    Definition Classes
    ConcatIterator → Iterator

  68. def nonEmpty: Boolean

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  69. final def notify(): Unit

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    Definition Classes
    AnyRef
    Annotations
    @IntrinsicCandidate()

  70. final def notifyAll(): Unit

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    Definition Classes
    AnyRef
    Annotations
    @IntrinsicCandidate()

  71. def padTo[A1 >: T](len: Int, elem: A1): Iterator[A1]

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    Definition Classes
    Iterator

  72. def partition(p: (T) ⇒ Boolean): (Iterator[T], Iterator[T])

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    Definition Classes
    Iterator

  73. def patch[B >: T](from: Int, patchElems: Iterator[B], replaced: Int): Iterator[B]

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    Definition Classes
    Iterator

  74. def product[B >: T](implicit num: Numeric[B]): B

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  75. def reduce[A1 >: T](op: (A1, A1) ⇒ A1): A1

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  76. def reduceLeft[B >: T](op: (B, T) ⇒ B): B

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    Definition Classes
    TraversableOnce

  77. def reduceLeftOption[B >: T](op: (B, T) ⇒ B): Option[B]

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  78. def reduceOption[A1 >: T](op: (A1, A1) ⇒ A1): Option[A1]

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  79. def reduceRight[B >: T](op: (T, B) ⇒ B): B

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  80. def reduceRightOption[B >: T](op: (T, B) ⇒ B): Option[B]

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  81. def reversed: List[T]

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    Attributes
    protected[this]
    Definition Classes
    TraversableOnce

  82. def sameElements(that: Iterator[_]): Boolean

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    Definition Classes
    Iterator

  83. def scanLeft[B](z: B)(op: (B, T) ⇒ B): Iterator[B]

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    Definition Classes
    Iterator

  84. def scanRight[B](z: B)(op: (T, B) ⇒ B): Iterator[B]

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    Definition Classes
    Iterator

  85. def seq: Iterator[T]

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    Definition Classes
    Iterator → TraversableOnce → GenTraversableOnce

  86. def size: Int

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  87. def slice(from: Int, until: Int): Iterator[T]

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    Definition Classes
    Iterator

  88. def sliding[B >: T](size: Int, step: Int): GroupedIterator[B]

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    Definition Classes
    Iterator

  89. def span(p: (T) ⇒ Boolean): (Iterator[T], Iterator[T])

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    Definition Classes
    Iterator

  90. def sum[B >: T](implicit num: Numeric[B]): B

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  91. final def synchronized[T0](arg0: ⇒ T0): T0

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    Definition Classes
    AnyRef

  92. def take(n: Int): Iterator[T]

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    Definition Classes
    Iterator

  93. def takeWhile(p: (T) ⇒ Boolean): Iterator[T]

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    Definition Classes
    Iterator

  94. def to[Col[_]](implicit cbf: CanBuildFrom[Nothing, T, Col[T]]): Col[T]

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  95. def toArray[B >: T](implicit arg0: ClassTag[B]): Array[B]

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  96. def toBuffer[B >: T]: Buffer[B]

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  97. def toIndexedSeq: IndexedSeq[T]

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  98. def toIterable: Iterable[T]

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  99. def toIterator: Iterator[T]

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    Definition Classes
    Iterator → GenTraversableOnce

  100. def toList: List[T]

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  101. def toMap[T, U](implicit ev: <:<[T, (T, U)]): Map[T, U]

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  102. def toSeq: Seq[T]

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  103. def toSet[B >: T]: Set[B]

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  104. def toStream: Stream[T]

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    Definition Classes
    Iterator → GenTraversableOnce

  105. def toString(): String

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    Definition Classes
    Iterator → AnyRef → Any

  106. def toTraversable: Traversable[T]

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    Definition Classes
    Iterator → TraversableOnce → GenTraversableOnce

  107. def toVector: Vector[T]

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  108. final def wait(arg0: Long, arg1: Int): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  109. final def wait(arg0: Long): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  110. final def wait(): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  111. def withFilter(p: (T) ⇒ Boolean): Iterator[T]

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    Definition Classes
    Iterator

  112. def zip[B](that: Iterator[B]): Iterator[(T, B)]

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    Definition Classes
    Iterator

  113. def zipAll[B, A1 >: T, B1 >: B](that: Iterator[B], thisElem: A1, thatElem: B1): Iterator[(A1, B1)]

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    Definition Classes
    Iterator

  114. def zipWithIndex: Iterator[(T, Int)]

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    Definition Classes
    Iterator

  115. def →[B](y: B): (ConcatIterator[T], B)

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    Implicit information
    This member is added by an implicit conversion from ConcatIterator[T] to ArrowAssoc[ConcatIterator[T]] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc

Shadowed Implicit Value Members

  1. def filter(p: (T) ⇒ Boolean): TraversableOnce[T]

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    Implicit information
    This member is added by an implicit conversion from ConcatIterator[T] to MonadOps[T] performed by method MonadOps in scala.collection.TraversableOnce.
    Shadowing
    This implicitly inherited member is shadowed by one or more members in this class.
    To access this member you can use a type ascription:
    (concatIterator: MonadOps[T]).filter(p)
    Definition Classes
    MonadOps

  2. def flatMap[B](f: (T) ⇒ GenTraversableOnce[B]): TraversableOnce[B]

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    Implicit information
    This member is added by an implicit conversion from ConcatIterator[T] to MonadOps[T] performed by method MonadOps in scala.collection.TraversableOnce.
    Shadowing
    This implicitly inherited member is shadowed by one or more members in this class.
    To access this member you can use a type ascription:
    (concatIterator: MonadOps[T]).flatMap(f)
    Definition Classes
    MonadOps

  3. def map[B](f: (T) ⇒ B): TraversableOnce[B]

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    Implicit information
    This member is added by an implicit conversion from ConcatIterator[T] to MonadOps[T] performed by method MonadOps in scala.collection.TraversableOnce.
    Shadowing
    This implicitly inherited member is shadowed by one or more members in this class.
    To access this member you can use a type ascription:
    (concatIterator: MonadOps[T]).map(f)
    Definition Classes
    MonadOps

  4. def withFilter(p: (T) ⇒ Boolean): Iterator[T]

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    Implicit information
    This member is added by an implicit conversion from ConcatIterator[T] to MonadOps[T] performed by method MonadOps in scala.collection.TraversableOnce.
    Shadowing
    This implicitly inherited member is shadowed by one or more members in this class.
    To access this member you can use a type ascription:
    (concatIterator: MonadOps[T]).withFilter(p)
    Definition Classes
    MonadOps

Deprecated Value Members

  1. def finalize(): Unit

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @Deprecated @deprecated @throws( classOf[java.lang.Throwable] )
    Deprecated

    (Since version ) see corresponding Javadoc for more information.

Inherited from Iterator[T]

Inherited from TraversableOnce[T]

Inherited from GenTraversableOnce[T]

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion MonadOps from ConcatIterator[T] to MonadOps[T]

Inherited by implicit conversion any2stringadd from ConcatIterator[T] to any2stringadd[ConcatIterator[T]]

Inherited by implicit conversion StringFormat from ConcatIterator[T] to StringFormat[ConcatIterator[T]]

Inherited by implicit conversion Ensuring from ConcatIterator[T] to Ensuring[ConcatIterator[T]]

Inherited by implicit conversion ArrowAssoc from ConcatIterator[T] to ArrowAssoc[ConcatIterator[T]]

Inherited by implicit conversion alternateImplicit from ConcatIterator[T] to ForceImplicitAmbiguity

Ungrouped