final class NonEmptySet[T] extends AnyVal
A non-empty Set: an ordered, immutable, non-empty collection of elements with LinearSeq
performance characteristics.
The purpose of NonEmptySet
is to allow you to express in a type that a Set
is non-empty, thereby eliminating the
need for (and potential exception from) a run-time check for non-emptiness. For a non-empty sequence with IndexedSeq
performance, see Every
.
Constructing NonEmptySet
s
You can construct a NonEmptySet
by passing one or more elements to the NonEmptySet.apply
factory method:
scala> NonEmptySet(1, 2, 3) res0: org.scalactic.anyvals.NonEmptySet[Int] = NonEmptySet(1, 2, 3)
Alternatively you can cons elements onto the End
singleton object, similar to making a Set
starting with Nil
:
scala> 1 :: 2 :: 3 :: Nil res0: Set[Int] = Set(1, 2, 3)
scala> 1 :: 2 :: 3 :: End res1: org.scalactic.NonEmptySet[Int] = NonEmptySet(1, 2, 3)
Note that although Nil
is a Set[Nothing]
, End
is
not a NonEmptySet[Nothing]
, because no empty NonEmptySet
exists. (A non-empty Set is a series
of connected links; if you have no links, you have no non-empty Set.)
scala> val nil: Set[Nothing] = Nil nil: Set[Nothing] = Set()
scala> val nada: NonEmptySet[Nothing] = End <console>:16: error: type mismatch; found : org.scalactic.anyvals.End.type required: org.scalactic.anyvals.NonEmptySet[Nothing] val nada: NonEmptySet[Nothing] = End ^
Working with NonEmptySet
s
NonEmptySet
does not extend Scala's Seq
or Traversable
traits because these require that
implementations may be empty. For example, if you invoke tail
on a Seq
that contains just one element,
you'll get an empty Seq
:
scala> Set(1).tail res6: Set[Int] = Set()
On the other hand, many useful methods exist on Seq
that when invoked on a non-empty Seq
are guaranteed
to not result in an empty Seq
. For convenience, NonEmptySet
defines a method corresponding to every such Seq
method. Here are some examples:
NonEmptySet(1, 2, 3).map(_ + 1) // Result: NonEmptySet(2, 3, 4) NonEmptySet(1).map(_ + 1) // Result: NonEmptySet(2) NonEmptySet(1, 2, 3).containsSlice(NonEmptySet(2, 3)) // Result: true NonEmptySet(1, 2, 3).containsSlice(NonEmptySet(3, 4)) // Result: false NonEmptySet(-1, -2, 3, 4, 5).minBy(_.abs) // Result: -1
NonEmptySet
does not currently define any methods corresponding to Seq
methods that could result in
an empty Seq
. However, an implicit converison from NonEmptySet
to Set
is defined in the NonEmptySet
companion object that will be applied if you attempt to call one of the missing methods. As a
result, you can invoke filter
on an NonEmptySet
, even though filter
could result
in an empty sequence—but the result type will be Set
instead of NonEmptySet
:
NonEmptySet(1, 2, 3).filter(_ < 10) // Result: Set(1, 2, 3) NonEmptySet(1, 2, 3).filter(_ > 10) // Result: Set()
You can use NonEmptySet
s in for
expressions. The result will be an NonEmptySet
unless
you use a filter (an if
clause). Because filters are desugared to invocations of filter
, the
result type will switch to a Set
at that point. Here are some examples:
scala> import org.scalactic.anyvals._ import org.scalactic.anyvals._ scala> for (i <- NonEmptySet(1, 2, 3)) yield i + 1 res0: org.scalactic.anyvals.NonEmptySet[Int] = NonEmptySet(2, 3, 4) scala> for (i <- NonEmptySet(1, 2, 3) if i < 10) yield i + 1 res1: Set[Int] = Set(2, 3, 4) scala> for { | i <- NonEmptySet(1, 2, 3) | j <- NonEmptySet('a', 'b', 'c') | } yield (i, j) res3: org.scalactic.anyvals.NonEmptySet[(Int, Char)] = NonEmptySet((1,a), (1,b), (1,c), (2,a), (2,b), (2,c), (3,a), (3,b), (3,c)) scala> for { | i <- NonEmptySet(1, 2, 3) if i < 10 | j <- NonEmptySet('a', 'b', 'c') | } yield (i, j) res6: Set[(Int, Char)] = Set((1,a), (1,b), (1,c), (2,a), (2,b), (2,c), (3,a), (3,b), (3,c))
- T
the type of elements contained in this
NonEmptySet
- Source
- NonEmptySet.scala
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- NonEmptySet
- AnyVal
- Any
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- final def !=(arg0: Any): Boolean
- Definition Classes
- Any
- final def ##: Int
- Definition Classes
- Any
- final def +(elem1: T, elem2: T, elems: T*): NonEmptySet[T]
Returns a new
NonEmptySet
with the given element added.Returns a new
NonEmptySet
with the given element added.- elem1
the first element to add.
- elem2
the second element to add.
- elems
the remaining elements to add.
- returns
a new
NonEmptySet
with the given elements added, omitting duplicates.
- final def +(element: T): NonEmptySet[T]
Returns a new
NonEmptySet
with the given element added.Returns a new
NonEmptySet
with the given element added.- element
the element to add to this
NonEmptySet
- returns
a new
NonEmptySet
consisting ofelement
and all elements of thisNonEmptySet
.
- def ++(other: IterableOnce[T]): NonEmptySet[T]
Returns a new
NonEmptySet
containing the elements of thisNonEmptySet
followed by the elements of the passedGenTraversableOnce
.Returns a new
NonEmptySet
containing the elements of thisNonEmptySet
followed by the elements of the passedGenTraversableOnce
. The element type of the resultingNonEmptySet
is the most specific superclass encompassing the element types of thisNonEmptySet
and the passedGenTraversableOnce
.- other
the
GenTraversableOnce
to append- returns
a new
NonEmptySet
that contains all the elements of thisNonEmptySet
followed by all elements ofother
.
- def ++[U >: T](other: Every[U]): NonEmptySet[U]
Returns a new
NonEmptySet
containing the elements of thisNonEmptySet
followed by the elements of the passedEvery
.Returns a new
NonEmptySet
containing the elements of thisNonEmptySet
followed by the elements of the passedEvery
. The element type of the resultingNonEmptySet
is the most specific superclass encompassing the element types of thisNonEmptySet
and the passedEvery
.- U
the element type of the returned
NonEmptySet
- other
the
Every
to append- returns
a new
NonEmptySet
that contains all the elements of thisNonEmptySet
followed by all elements ofother
.
- def ++[U >: T](other: NonEmptySet[U]): NonEmptySet[U]
Returns a new
NonEmptySet
containing the elements of thisNonEmptySet
followed by the elements of the passedNonEmptySet
.Returns a new
NonEmptySet
containing the elements of thisNonEmptySet
followed by the elements of the passedNonEmptySet
. The element type of the resultingNonEmptySet
is the most specific superclass encompassing the element types of this and the passedNonEmptySet
.- U
the element type of the returned
NonEmptySet
- other
the
NonEmptySet
to append- returns
a new
NonEmptySet
that contains all the elements of thisNonEmptySet
followed by all elements ofother
.
- final def ==(arg0: Any): Boolean
- Definition Classes
- Any
- final def addString(sb: StringBuilder, start: String, sep: String, end: String): StringBuilder
Appends all elements of this
NonEmptySet
to a string builder using start, end, and separator strings.Appends all elements of this
NonEmptySet
to a string builder using start, end, and separator strings. The written text will consist of a concatenation of the stringstart
; the result of invokingtoString
on all elements of thisNonEmptySet
, separated by the stringsep
; and the stringend
- sb
the string builder to which elements will be appended
- start
the ending string
- sep
the separator string
- returns
the string builder,
sb
, to which elements were appended.
- final def addString(sb: StringBuilder, sep: String): StringBuilder
Appends all elements of this
NonEmptySet
to a string builder using a separator string.Appends all elements of this
NonEmptySet
to a string builder using a separator string. The written text will consist of a concatenation of the result of invokingtoString
on of every element of thisNonEmptySet
, separated by the stringsep
.- sb
the string builder to which elements will be appended
- sep
the separator string
- returns
the string builder,
sb
, to which elements were appended.
- final def addString(sb: StringBuilder): StringBuilder
Appends all elements of this
NonEmptySet
to a string builder.Appends all elements of this
NonEmptySet
to a string builder. The written text will consist of a concatenation of the result of invokingtoString
on of every element of thisNonEmptySet
, without any separator string.- sb
the string builder to which elements will be appended
- returns
the string builder,
sb
, to which elements were appended.
- final def apply(elem: T): Boolean
Check if an element exists at its index in the
NonEmptySet
.Check if an element exists at its index in the
NonEmptySet
.- returns
true
if a element exists inNonEmptySet
at indexidx
, wherefalse
indicates the element at indexidx
does not exist.
- final def asInstanceOf[T0]: T0
- Definition Classes
- Any
- final def collectFirst[U](pf: PartialFunction[T, U]): Option[U]
Finds the first element of this
NonEmptySet
for which the given partial function is defined, if any, and applies the partial function to it.Finds the first element of this
NonEmptySet
for which the given partial function is defined, if any, and applies the partial function to it.- pf
the partial function
- returns
an
Option
containingpf
applied to the first element for which it is defined, orNone
if the partial function was not defined for any element.
- final def contains(elem: T): Boolean
Indicates whether this
NonEmptySet
contains a given value as an element.Indicates whether this
NonEmptySet
contains a given value as an element.- elem
the element to look for
- returns
true if this
NonEmptySet
has an element that is equal (as determined by==)
toelem
, false otherwise.
- final def copyToArray[U >: T](arr: Array[U], start: Int, len: Int): Unit
Copies values of this
NonEmptySet
to an array.Copies values of this
NonEmptySet
to an array. Fills the given arrayarr
with at mostlen
elements of thisNonEmptySet
, beginning at indexstart
. Copying will stop once either the end of the currentNonEmptySet
is reached, the end of the array is reached, orlen
elements have been copied.- arr
the array to fill
- start
the starting index
- len
the maximum number of elements to copy
- final def copyToArray[U >: T](arr: Array[U], start: Int): Unit
Copies values of this
NonEmptySet
to an array.Copies values of this
NonEmptySet
to an array. Fills the given arrayarr
with values of thisNonEmptySet
, beginning at indexstart
. Copying will stop once either the end of the currentNonEmptySet
is reached, or the end of the array is reached.- arr
the array to fill
- start
the starting index
- final def copyToArray[U >: T](arr: Array[U]): Unit
Copies values of this
NonEmptySet
to an array.Copies values of this
NonEmptySet
to an array. Fills the given arrayarr
with values of thisNonEmptySet
. Copying will stop once either the end of the currentNonEmptySet
is reached, or the end of the array is reached.- arr
the array to fill
- final def copyToBuffer[U >: T](buf: Buffer[U]): Unit
Copies all elements of this
NonEmptySet
to a buffer.Copies all elements of this
NonEmptySet
to a buffer.- buf
the buffer to which elements are copied
- final def count(p: (T) => Boolean): Int
Counts the number of elements in this
NonEmptySet
that satisfy a predicate.Counts the number of elements in this
NonEmptySet
that satisfy a predicate.- p
the predicate used to test elements.
- returns
the number of elements satisfying the predicate
p
.
- final def exists(p: (T) => Boolean): Boolean
Indicates whether a predicate holds for at least one of the elements of this
NonEmptySet
.Indicates whether a predicate holds for at least one of the elements of this
NonEmptySet
.- p
the predicate used to test elements.
- returns
true
if the given predicatep
holds for some of the elements of thisNonEmptySet
, otherwisefalse
.
- final def find(p: (T) => Boolean): Option[T]
Finds the first element of this
NonEmptySet
that satisfies the given predicate, if any.Finds the first element of this
NonEmptySet
that satisfies the given predicate, if any.- p
the predicate used to test elements
- returns
an
Some
containing the first element in thisNonEmptySet
that satisfiesp
, orNone
if none exists.
- final def flatMap[U](f: (T) => NonEmptySet[U]): NonEmptySet[U]
Builds a new
NonEmptySet
by applying a function to all elements of thisNonEmptySet
and using the elements of the resultingNonEmptySet
s.Builds a new
NonEmptySet
by applying a function to all elements of thisNonEmptySet
and using the elements of the resultingNonEmptySet
s.- U
the element type of the returned
NonEmptySet
- f
the function to apply to each element.
- returns
a new
NonEmptySet
containing elements obtained by applying the given functionf
to each element of thisNonEmptySet
and concatenating the elements of resultingNonEmptySet
s.
- final def flatten[B](implicit ev: <:<[T, NonEmptySet[B]]): NonEmptySet[B]
Converts this
NonEmptySet
ofNonEmptySet
s into aNonEmptySet
formed by the elements of the nestedNonEmptySet
s.Converts this
NonEmptySet
ofNonEmptySet
s into aNonEmptySet
formed by the elements of the nestedNonEmptySet
s.Note: You cannot use this
flatten
method on aNonEmptySet
that contains aGenTraversableOnce
s, because if all the nestedGenTraversableOnce
s were empty, you'd end up with an emptyNonEmptySet
.- returns
a new
NonEmptySet
resulting from concatenating all nestedNonEmptySet
s.
- final def fold[U >: T](z: U)(op: (U, U) => U): U
Folds the elements of this
NonEmptySet
using the specified associative binary operator.Folds the elements of this
NonEmptySet
using the specified associative binary operator.The order in which operations are performed on elements is unspecified and may be nondeterministic.
- U
a type parameter for the binary operator, a supertype of T.
- z
a neutral element for the fold operation; may be added to the result an arbitrary number of times, and must not change the result (e.g.,
Nil
for Set concatenation, 0 for addition, or 1 for multiplication.)- op
a binary operator that must be associative
- returns
the result of applying fold operator
op
between all the elements andz
- final def foldLeft[B](z: B)(op: (B, T) => B): B
Applies a binary operator to a start value and all elements of this
NonEmptySet
, going left to right.Applies a binary operator to a start value and all elements of this
NonEmptySet
, going left to right.- B
the result type of the binary operator.
- z
the start value.
- op
the binary operator.
- returns
the result of inserting
op
between consecutive elements of thisNonEmptySet
, going left to right, with the start value,z
, on the left:op(...op(op(z, x_1), x_2), ..., x_n)
where x_{1}, ..., x_{n} are the elements of thisNonEmptySet
.
- final def foldRight[B](z: B)(op: (T, B) => B): B
Applies a binary operator to all elements of this
NonEmptySet
and a start value, going right to left.Applies a binary operator to all elements of this
NonEmptySet
and a start value, going right to left.- B
the result of the binary operator
- z
the start value
- op
the binary operator
- returns
the result of inserting
op
between consecutive elements of thisNonEmptySet
, going right to left, with the start value,z
, on the right:op(x_1, op(x_2, ... op(x_n, z)...))
where x_{1}, ..., x_{n} are the elements of thisNonEmptySet
.
- final def forall(p: (T) => Boolean): Boolean
Indicates whether a predicate holds for all elements of this
NonEmptySet
.Indicates whether a predicate holds for all elements of this
NonEmptySet
.- p
the predicate used to test elements.
- returns
true
if the given predicatep
holds for all elements of thisNonEmptySet
, otherwisefalse
.
- final def foreach(f: (T) => Unit): Unit
Applies a function
f
to all elements of thisNonEmptySet
.Applies a function
f
to all elements of thisNonEmptySet
.- f
the function that is applied for its side-effect to every element. The result of function
f
is discarded.
- def getClass(): Class[_ <: AnyVal]
- Definition Classes
- AnyVal → Any
- final def groupBy[K](f: (T) => K): Map[K, NonEmptySet[T]]
Partitions this
NonEmptySet
into a map ofNonEmptySet
s according to some discriminator function.Partitions this
NonEmptySet
into a map ofNonEmptySet
s according to some discriminator function.- K
the type of keys returned by the discriminator function.
- f
the discriminator function.
- returns
A map from keys to
NonEmptySet
s such that the following invariant holds:(NonEmptySet.toSet partition f)(k) = xs filter (x => f(x) == k)
That is, every keyk
is bound to aNonEmptySet
of those elementsx
for whichf(x)
equalsk
.
- final def grouped(size: Int): Iterator[NonEmptySet[T]]
Partitions elements into fixed size
NonEmptySet
s.Partitions elements into fixed size
NonEmptySet
s.- size
the number of elements per group
- returns
An iterator producing
NonEmptySet
s of sizesize
, except the last will be truncated if the elements don't divide evenly.
- final def hasDefiniteSize: Boolean
Returns
true
to indicate thisNonEmptySet
has a definite size, since allNonEmptySet
s are strict collections. - final def head: T
Selects the first element of this
NonEmptySet
.Selects the first element of this
NonEmptySet
.- returns
the first element of this
NonEmptySet
.
- final def headOption: Option[T]
Selects the first element of this
NonEmptySet
and returns it wrapped in aSome
.Selects the first element of this
NonEmptySet
and returns it wrapped in aSome
.- returns
the first element of this
NonEmptySet
, wrapped in aSome
.
- final def isEmpty: Boolean
Returns
false
to indicate thisNonEmptySet
, like allNonEmptySet
s, is non-empty.Returns
false
to indicate thisNonEmptySet
, like allNonEmptySet
s, is non-empty.- returns
false
- final def isInstanceOf[T0]: Boolean
- Definition Classes
- Any
- final def isTraversableAgain: Boolean
Returns
true
to indicate thisNonEmptySet
, like allNonEmptySet
s, can be traversed repeatedly.Returns
true
to indicate thisNonEmptySet
, like allNonEmptySet
s, can be traversed repeatedly.- returns
true
- final def iterator: Iterator[T]
Creates and returns a new iterator over all elements contained in this
NonEmptySet
.Creates and returns a new iterator over all elements contained in this
NonEmptySet
.- returns
the new iterator
- final def last: T
Selects the last element of this
NonEmptySet
.Selects the last element of this
NonEmptySet
.- returns
the last element of this
NonEmptySet
.
- final def lastOption: Option[T]
Returns the last element of this
NonEmptySet
, wrapped in aSome
.Returns the last element of this
NonEmptySet
, wrapped in aSome
.- returns
the last element, wrapped in a
Some
.
- final def map[U](f: (T) => U): NonEmptySet[U]
Builds a new
NonEmptySet
by applying a function to all elements of thisNonEmptySet
.Builds a new
NonEmptySet
by applying a function to all elements of thisNonEmptySet
.- U
the element type of the returned
NonEmptySet
.- f
the function to apply to each element.
- returns
a new
NonEmptySet
resulting from applying the given functionf
to each element of thisNonEmptySet
and collecting the results.
- final def max[U >: T](implicit cmp: Ordering[U]): T
Finds the largest element.
Finds the largest element.
- returns
the largest element of this
NonEmptySet
.
- final def maxBy[U](f: (T) => U)(implicit cmp: Ordering[U]): T
Finds the largest result after applying the given function to every element.
Finds the largest result after applying the given function to every element.
- returns
the largest result of applying the given function to every element of this
NonEmptySet
.
- final def min[U >: T](implicit cmp: Ordering[U]): T
Finds the smallest element.
Finds the smallest element.
- returns
the smallest element of this
NonEmptySet
.
- final def minBy[U](f: (T) => U)(implicit cmp: Ordering[U]): T
Finds the smallest result after applying the given function to every element.
Finds the smallest result after applying the given function to every element.
- returns
the smallest result of applying the given function to every element of this
NonEmptySet
.
- final def mkString(start: String, sep: String, end: String): String
Displays all elements of this
NonEmptySet
in a string using start, end, and separator strings.Displays all elements of this
NonEmptySet
in a string using start, end, and separator strings.- start
the starting string.
- sep
the separator string.
- end
the ending string.
- returns
a string representation of this
NonEmptySet
. The resulting string begins with the stringstart
and ends with the stringend
. Inside, In the resulting string, the result of invokingtoString
on all elements of thisNonEmptySet
are separated by the stringsep
.
- final def mkString(sep: String): String
Displays all elements of this
NonEmptySet
in a string using a separator string.Displays all elements of this
NonEmptySet
in a string using a separator string.- sep
the separator string
- returns
a string representation of this
NonEmptySet
. In the resulting string, the result of invokingtoString
on all elements of thisNonEmptySet
are separated by the stringsep
.
- final def mkString: String
Displays all elements of this
NonEmptySet
in a string.Displays all elements of this
NonEmptySet
in a string.- returns
a string representation of this
NonEmptySet
. In the resulting string, the result of invokingtoString
on all elements of thisNonEmptySet
follow each other without any separator string.
- final def nonEmpty: Boolean
Returns
true
to indicate thisNonEmptySet
, like allNonEmptySet
s, is non-empty.Returns
true
to indicate thisNonEmptySet
, like allNonEmptySet
s, is non-empty.- returns
true
- final def product[U >: T](implicit num: Numeric[U]): U
The result of multiplying all the elements of this
NonEmptySet
.The result of multiplying all the elements of this
NonEmptySet
.This method can be invoked for any
NonEmptySet[T]
for which an implicitNumeric[T]
exists.- returns
the product of all elements
- final def reduce[U >: T](op: (U, U) => U): U
Reduces the elements of this
NonEmptySet
using the specified associative binary operator.Reduces the elements of this
NonEmptySet
using the specified associative binary operator.The order in which operations are performed on elements is unspecified and may be nondeterministic.
- U
a type parameter for the binary operator, a supertype of T.
- op
a binary operator that must be associative.
- returns
the result of applying reduce operator
op
between all the elements of thisNonEmptySet
.
- final def reduceLeft[U >: T](op: (U, T) => U): U
Applies a binary operator to all elements of this
NonEmptySet
, going left to right.Applies a binary operator to all elements of this
NonEmptySet
, going left to right.- U
the result type of the binary operator.
- op
the binary operator.
- returns
the result of inserting
op
between consecutive elements of thisNonEmptySet
, going left to right:op(...op(op(x_1, x_2), x_3), ..., x_n)
where x_{1}, ..., x_{n} are the elements of thisNonEmptySet
.
- final def reduceLeftOption[U >: T](op: (U, T) => U): Option[U]
Applies a binary operator to all elements of this
NonEmptySet
, going left to right, returning the result in aSome
.Applies a binary operator to all elements of this
NonEmptySet
, going left to right, returning the result in aSome
.- U
the result type of the binary operator.
- op
the binary operator.
- returns
a
Some
containing the result ofreduceLeft(op)
- final def reduceOption[U >: T](op: (U, U) => U): Option[U]
- final def reduceRight[U >: T](op: (T, U) => U): U
Applies a binary operator to all elements of this
NonEmptySet
, going right to left.Applies a binary operator to all elements of this
NonEmptySet
, going right to left.- U
the result of the binary operator
- op
the binary operator
- returns
the result of inserting
op
between consecutive elements of thisNonEmptySet
, going right to left:op(x_1, op(x_2, ... op(x_{n-1}, x_n)...))
where x_{1}, ..., x_{n} are the elements of thisNonEmptySet
.
- final def reduceRightOption[U >: T](op: (T, U) => U): Option[U]
Applies a binary operator to all elements of this
NonEmptySet
, going right to left, returning the result in aSome
.Applies a binary operator to all elements of this
NonEmptySet
, going right to left, returning the result in aSome
.- U
the result of the binary operator
- op
the binary operator
- returns
a
Some
containing the result ofreduceRight(op)
- final def sameElements[U >: T](that: NonEmptySet[U]): Boolean
Checks if the given
NonEmptySet
contains the same elements in the same order as thisNonEmptySet
.Checks if the given
NonEmptySet
contains the same elements in the same order as thisNonEmptySet
.- that
the
NonEmptySet
with which to compare- returns
true
, if both this and the givenNonEmptySet
contain the same elements in the same order,false
otherwise.
- final def sameElements[U >: T](that: Every[U]): Boolean
Checks if the given
Every
contains the same elements in the same order as thisNonEmptySet
.Checks if the given
Every
contains the same elements in the same order as thisNonEmptySet
.- that
the
Every
with which to compare- returns
true
, if both this and the givenEvery
contain the same elements in the same order,false
otherwise.
- final def sameElements[U >: T](that: GenIterable[U]): Boolean
Checks if the given
GenIterable
contains the same elements in the same order as thisNonEmptySet
.Checks if the given
GenIterable
contains the same elements in the same order as thisNonEmptySet
.- that
the
GenIterable
with which to compare- returns
true
, if both thisNonEmptySet
and the givenGenIterable
contain the same elements in the same order,false
otherwise.
- final def scan[U >: T](z: U)(op: (U, U) => U): NonEmptySet[U]
Computes a prefix scan of the elements of this
NonEmptySet
.Computes a prefix scan of the elements of this
NonEmptySet
.Note: The neutral element z may be applied more than once.
Here are some examples:
NonEmptySet(1, 2, 3).scan(0)(_ + _) == NonEmptySet(0, 1, 3, 6) NonEmptySet(1, 2, 3).scan("z")(_ + _.toString) == NonEmptySet("z", "z1", "z12", "z123")
- U
a type parameter for the binary operator, a supertype of T, and the type of the resulting
NonEmptySet
.- z
a neutral element for the scan operation; may be added to the result an arbitrary number of times, and must not change the result (e.g.,
Nil
for Set concatenation, 0 for addition, or 1 for multiplication.)- op
a binary operator that must be associative
- returns
a new
NonEmptySet
containing the prefix scan of the elements in thisNonEmptySet
- final def scanLeft[B](z: B)(op: (B, T) => B): NonEmptySet[B]
Produces a
NonEmptySet
containing cumulative results of applying the operator going left to right.Produces a
NonEmptySet
containing cumulative results of applying the operator going left to right.Here are some examples:
NonEmptySet(1, 2, 3).scanLeft(0)(_ + _) == NonEmptySet(0, 1, 3, 6) NonEmptySet(1, 2, 3).scanLeft("z")(_ + _) == NonEmptySet("z", "z1", "z12", "z123")
- B
the result type of the binary operator and type of the resulting
NonEmptySet
- z
the start value.
- op
the binary operator.
- returns
a new
NonEmptySet
containing the intermediate results of insertingop
between consecutive elements of thisNonEmptySet
, going left to right, with the start value,z
, on the left.
- final def scanRight[B](z: B)(op: (T, B) => B): NonEmptySet[B]
Produces a
NonEmptySet
containing cumulative results of applying the operator going right to left.Produces a
NonEmptySet
containing cumulative results of applying the operator going right to left.Here are some examples:
NonEmptySet(1, 2, 3).scanRight(0)(_ + _) == NonEmptySet(6, 5, 3, 0) NonEmptySet(1, 2, 3).scanRight("z")(_ + _) == NonEmptySet("123z", "23z", "3z", "z")
- B
the result of the binary operator and type of the resulting
NonEmptySet
- z
the start value
- op
the binary operator
- returns
a new
NonEmptySet
containing the intermediate results of insertingop
between consecutive elements of thisNonEmptySet
, going right to left, with the start value,z
, on the right.
- final def size: Int
The size of this
NonEmptySet
.The size of this
NonEmptySet
.Note:
length
andsize
yield the same result, which will be>
= 1.- returns
the number of elements in this
NonEmptySet
.
- final def sliding(size: Int, step: Int): Iterator[NonEmptySet[T]]
Groups elements in fixed size blocks by passing a “sliding window” over them (as opposed to partitioning them, as is done in grouped.), moving the sliding window by a given
step
each time.Groups elements in fixed size blocks by passing a “sliding window” over them (as opposed to partitioning them, as is done in grouped.), moving the sliding window by a given
step
each time.- size
the number of elements per group
- step
the distance between the first elements of successive groups
- returns
an iterator producing
NonEmptySet
s of sizesize
, except the last and the only element will be truncated if there are fewer elements thansize
.
- final def sliding(size: Int): Iterator[NonEmptySet[T]]
Groups elements in fixed size blocks by passing a “sliding window” over them (as opposed to partitioning them, as is done in grouped.)
Groups elements in fixed size blocks by passing a “sliding window” over them (as opposed to partitioning them, as is done in grouped.)
- size
the number of elements per group
- returns
an iterator producing
NonEmptySet
s of sizesize
, except the last and the only element will be truncated if there are fewer elements thansize
.
- def stringPrefix: String
Returns
"NonEmptySet"
, the prefix of this object'stoString
representation.Returns
"NonEmptySet"
, the prefix of this object'stoString
representation.- returns
the string
"NonEmptySet"
- final def sum[U >: T](implicit num: Numeric[U]): U
The result of summing all the elements of this
NonEmptySet
.The result of summing all the elements of this
NonEmptySet
.This method can be invoked for any
NonEmptySet[T]
for which an implicitNumeric[T]
exists.- returns
the sum of all elements
- final def to[Col[_]](factory: Factory[T, Col[T]]): Col[T]
Converts this
NonEmptySet
into a collection of typeCol
by copying all elements.Converts this
NonEmptySet
into a collection of typeCol
by copying all elements.- Col
the collection type to build.
- returns
a new collection containing all elements of this
NonEmptySet
.
- final def toArray[U >: T](implicit classTag: ClassTag[U]): Array[U]
Converts this
NonEmptySet
to an array.Converts this
NonEmptySet
to an array.- returns
an array containing all elements of this
NonEmptySet
. AClassTag
must be available for the element type of thisNonEmptySet
.
- final def toBuffer[U >: T]: Buffer[U]
Converts this
NonEmptySet
to a mutable buffer.Converts this
NonEmptySet
to a mutable buffer.- returns
a buffer containing all elements of this
NonEmptySet
.
- final def toIndexedSeq: IndexedSeq[T]
Converts this
NonEmptySet
to an immutableIndexedSeq
.Converts this
NonEmptySet
to an immutableIndexedSeq
.- returns
an immutable
IndexedSeq
containing all elements of thisNonEmptySet
.
- final def toIterable: Iterable[T]
Converts this
NonEmptySet
to an iterable collection.Converts this
NonEmptySet
to an iterable collection.- returns
an
Iterable
containing all elements of thisNonEmptySet
.
- final def toIterator: Iterator[T]
Returns an
Iterator
over the elements in thisNonEmptySet
.Returns an
Iterator
over the elements in thisNonEmptySet
.- returns
an
Iterator
containing all elements of thisNonEmptySet
.
- final def toList: List[T]
Converts this
NonEmptySet
to a set.Converts this
NonEmptySet
to a set.- returns
a set containing all elements of this
NonEmptySet
.
- final def toMap[K, V](implicit ev: <:<[T, (K, V)]): Map[K, V]
Converts this
NonEmptySet
to a map.Converts this
NonEmptySet
to a map.This method is unavailable unless the elements are members of
Tuple2
, each((K, V))
becoming a key-value pair in the map. Duplicate keys will be overwritten by later keys.- returns
a map of type
immutable.Map[K, V]
containing all key/value pairs of type(K, V)
of thisNonEmptySet
.
- final def toSeq: Seq[T]
Converts this
NonEmptySet
to an immutableIndexedSeq
.Converts this
NonEmptySet
to an immutableIndexedSeq
.- returns
an immutable
IndexedSeq
containing all elements of thisNonEmptySet
.
- val toSet: Set[T]
- final def toStream: Stream[T]
Converts this
NonEmptySet
to a stream.Converts this
NonEmptySet
to a stream.- returns
a stream containing all elements of this
NonEmptySet
.
- def toString(): String
Returns a string representation of this
NonEmptySet
.Returns a string representation of this
NonEmptySet
.- returns
the string
"NonEmptySet"
followed by the result of invokingtoString
on thisNonEmptySet
's elements, surrounded by parentheses.
- Definition Classes
- NonEmptySet → Any
- final def toVector: Vector[T]
Converts this
NonEmptySet
to aVector
.Converts this
NonEmptySet
to aVector
.- returns
a
Vector
containing all elements of thisNonEmptySet
.
- final def transpose[U](implicit ev: <:<[T, NonEmptySet[U]]): NonEmptySet[NonEmptySet[U]]
- final def union(that: GenSet[T]): NonEmptySet[T]
Produces a new
NonEmptySet
that contains all elements of thisNonEmptySet
and also all elements of a givenGenSeq
.Produces a new
NonEmptySet
that contains all elements of thisNonEmptySet
and also all elements of a givenGenSeq
.NonEmptySetX
union
ys
is equivalent toNonEmptySetX
++
ys
.Another way to express this is that
NonEmptySetX
union
ys
computes the order-presevring multi-set union ofNonEmptySetX
andys
. Thisunion
method is hence a counter-part ofdiff
andintersect
that also work on multi-sets.- that
the
GenSet
to add.- returns
a new
NonEmptySet
that contains all elements of thisNonEmptySet
followed by all elements ofthat
GenSeq
.
- final def union(that: NonEmptySet[T]): NonEmptySet[T]
Produces a new
NonEmptySet
that contains all elements of thisNonEmptySet
and also all elements of a givenNonEmptySet
.Produces a new
NonEmptySet
that contains all elements of thisNonEmptySet
and also all elements of a givenNonEmptySet
.NonEmptySetX
union
NonEmptySetY
is equivalent toNonEmptySetX
++
NonEmptySetY
.Another way to express this is that
NonEmptySetX
union
NonEmptySetY
computes the order-presevring multi-set union ofNonEmptySetX
andNonEmptySetY
. Thisunion
method is hence a counter-part ofdiff
andintersect
that also work on multi-sets.- that
the
NonEmptySet
to add.- returns
a new
NonEmptySet
that contains all elements of thisNonEmptySet
followed by all elements ofthat
.
- final def union(that: Every[T]): NonEmptySet[T]
Produces a new
NonEmptySet
that contains all elements of thisNonEmptySet
and also all elements of a givenEvery
.Produces a new
NonEmptySet
that contains all elements of thisNonEmptySet
and also all elements of a givenEvery
.NonEmptySetX
union
everyY
is equivalent toNonEmptySetX
++
everyY
.Another way to express this is that
NonEmptySetX
union
everyY
computes the order-presevring multi-set union ofNonEmptySetX
andeveryY
. Thisunion
method is hence a counter-part ofdiff
andintersect
that also work on multi-sets.- that
the
Every
to add.- returns
a new
NonEmptySet
that contains all elements of thisNonEmptySet
followed by all elements ofthat
Every
.
- final def unzip[L, R](implicit asPair: (T) => (L, R)): (NonEmptySet[L], NonEmptySet[R])
Converts this
NonEmptySet
of pairs into twoNonEmptySet
s of the first and second half of each pair.Converts this
NonEmptySet
of pairs into twoNonEmptySet
s of the first and second half of each pair.- L
the type of the first half of the element pairs
- R
the type of the second half of the element pairs
- asPair
an implicit conversion that asserts that the element type of this
NonEmptySet
is a pair.- returns
a pair of
NonEmptySet
s, containing the first and second half, respectively, of each element pair of thisNonEmptySet
.
- final def unzip3[L, M, R](implicit asTriple: (T) => (L, M, R)): (NonEmptySet[L], NonEmptySet[M], NonEmptySet[R])
Converts this
NonEmptySet
of triples into threeNonEmptySet
s of the first, second, and and third element of each triple.Converts this
NonEmptySet
of triples into threeNonEmptySet
s of the first, second, and and third element of each triple.- L
the type of the first member of the element triples
- M
the type of the second member of the element triples
- R
the type of the third member of the element triples
- asTriple
an implicit conversion that asserts that the element type of this
NonEmptySet
is a triple.- returns
a triple of
NonEmptySet
s, containing the first, second, and third member, respectively, of each element triple of thisNonEmptySet
.
- final def zipAll[O, U >: T](other: Iterable[O], thisElem: U, otherElem: O): NonEmptySet[(U, O)]
Returns a
NonEmptySet
formed from thisNonEmptySet
and an iterable collection by combining corresponding elements in pairs.Returns a
NonEmptySet
formed from thisNonEmptySet
and an iterable collection by combining corresponding elements in pairs. If one of the two collections is shorter than the other, placeholder elements will be used to extend the shorter collection to the length of the longer.- other
the
Iterable
providing the second half of each result pair- thisElem
the element to be used to fill up the result if this
NonEmptySet
is shorter thanthat
Iterable
.- otherElem
the element to be used to fill up the result if
that
Iterable
is shorter than thisNonEmptySet
.- returns
a new
NonEmptySet
containing pairs consisting of corresponding elements of thisNonEmptySet
andthat
. The length of the returned collection is the maximum of the lengths of thisNonEmptySet
andthat
. If thisNonEmptySet
is shorter thanthat
,thisElem
values are used to pad the result. Ifthat
is shorter than thisNonEmptySet
,thatElem
values are used to pad the result.
- final def zipWithIndex: NonEmptySet[(T, Int)]
Zips this
NonEmptySet
with its indices.Zips this
NonEmptySet
with its indices.- returns
A new
NonEmptySet
containing pairs consisting of all elements of thisNonEmptySet
paired with their index. Indices start at 0.