NonEmptyMap

Companion object NonEmptyMap

final class NonEmptyMap[K, +V] extends AnyVal

A non-empty map: an ordered, immutable, non-empty collection of key-value tuples with LinearSeq performance characteristics.

The purpose of NonEmptyMap is to allow you to express in a type that a Map 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 Vector.

Constructing `NonEmptyMap`s

You can construct a NonEmptyMap by passing one or more elements to the NonEmptyMap.apply factory method:

scala> NonEmptyMap(1 -> "one", 2 -> "two", 3 -> "three")
res0: org.scalactic.anyvals.NonEmptyMap[Int, String] = NonEmptyMap(1 -> "one", 2 -> "two", 3 -> "three")

Working with `NonEmptyMap`s

NonEmptyMap does not extend Scala's Map 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> Map(1 -> "one").tail
res6: Map[Int] = Map()

On the other hand, many useful methods exist on Map that when invoked on a non-empty Seq are guaranteed to not result in an empty Map. For convenience, NonEmptyMap defines a method corresponding to every such Map method. Here are an example:

NonEmptyMap(1 -> "one", 2 -> "two", 3 -> "three").map(t => (t._1 + 1, t._2))                        // Result: NonEmptyMap(2 -> "one", 3 -> "two", 4 -> "three")

NonEmptyMap does not currently define any methods corresponding to Map methods that could result in an empty Map. However, an implicit converison from NonEmptyMap to Map is defined in the NonEmptyMap 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 NonEmptyMap, even though filter could result in an empty map—but the result type will be Map instead of NonEmptyMap:

NonEmptyMap(1 -> "one", 2 -> "two", 3 -> "three").filter(_._1 < 10) // Result: Map(1 -> "one", 2 -> "two", 3 -> "three")
NonEmptyMap(1 -> "one", 2 -> "two", 3 -> "three").filter(_._ 1> 10) // Result: Map()

You can use NonEmptyMaps in for expressions. The result will be an NonEmptyMap unless you use a filter (an if clause). Because filters are desugared to invocations of filter, the result type will switch to a Map at that point. Here are some examples:

scala> import org.scalactic.anyvals._
import org.scalactic.anyvals._

scala> for ((i, j) <- NonEmptyMap(1 -> "one", 2 -> "two", 3 -> "three")) yield (i + 1, j)
res0: org.scalactic.anyvals.NonEmptyMap[Int, String] = NonEmptyMap(2 -> "one", 3 -> "two", 4 -> "three")

scala> for ((i, j) <- NonEmptyMap(1, 2, 3) if i < 10) yield (i + 1, j)
res1: Map[Int, String] = Map(2 -> "one", 3 -> "two", 4 -> "three")

K: the type of key contained in this NonEmptyMap
V: the type of value contained in this NonEmptyMap

Linear Supertypes

AnyVal, Any

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final def !=(arg0: Any): Boolean
Definition Classes
Any
final def ##: Int
Definition Classes
Any
def +[V1 >: V](entries: (K, V1)*): NonEmptyMap[K, V1]
Returns a new NonEmptyMap with the given entries added.
Returns a new NonEmptyMap with the given entries added.
entries
the entries to add to this NonEmptyMap
returns
a new NonEmptyMap consisting of all entries of this NonEmptyMap and entries.
def +[V1 >: V](entry: (K, V1)): NonEmptyMap[K, V1]
Returns a new NonEmptyMap with the given entry added.
Returns a new NonEmptyMap with the given entry added.
entry
the entry to add to this NonEmptyMap
returns
a new NonEmptyMap consisting of all entries of this NonEmptyMap and entry.
def ++[V1 >: V](other: IterableOnce[(K, V1)]): NonEmptyMap[K, V1]
Returns a new NonEmptyMap containing the entries of this NonEmptyMap and the entries of the passed TraversableOnce.
Returns a new NonEmptyMap containing the entries of this NonEmptyMap and the entries of the passed TraversableOnce. The entry type of the resulting NonEmptyMap is the most specific superclass encompassing the entry types of this NonEmptyMap and the passed TraversableOnce.
V1
the value type of the returned NonEmptyMap
other
the TraversableOnce to append
returns
a new NonEmptyMap that contains all the elements of this NonEmptyMap followed by all elements of other.
def ++[V1 >: V](other: Vector[(K, V1)]): NonEmptyMap[K, V1]
Returns a new NonEmptyMap containing the entries of this NonEmptyMap and the entries of the passed Vector.
Returns a new NonEmptyMap containing the entries of this NonEmptyMap and the entries of the passed Vector. The entry type of the resulting NonEmptyMap is the most specific superclass encompassing the entry types of this NonEmptyMap and the passed Vector.
V1
the value type of the returned NonEmptyMap
other
the Vector to append
returns
a new NonEmptyMap that contains all the entries of this NonEmptyMap and all elements of other.
def ++[V1 >: V](other: NonEmptyMap[K, V1]): NonEmptyMap[K, V1]
Returns a new NonEmptyMap containing the entries of this NonEmptyMap and the entries of the passed NonEmptyMap.
Returns a new NonEmptyMap containing the entries of this NonEmptyMap and the entries of the passed NonEmptyMap. The entry type of the resulting NonEmptyMap is the most specific superclass encompassing the entry types of this and the passed NonEmptyMap.
V1
the value type of the returned NonEmptyMap
other
the NonEmptyMap to append
returns
a new NonEmptyMap that contains all the elements of this NonEmptyMap and all elements of other.
def ++:[V1 >: V](other: IterableOnce[(K, V1)]): NonEmptyMap[K, V1]
Returns a new NonEmptyMap containing the entries of this NonEmptyMap and the entries of the passed TraversableOnce.
Returns a new NonEmptyMap containing the entries of this NonEmptyMap and the entries of the passed TraversableOnce. The entry type of the resulting NonEmptyMap is the most specific superclass encompassing the entry types of this NonEmptyMap and the passed TraversableOnce.
V1
the value type of the returned NonEmptyMap
other
the TraversableOnce to append
returns
a new NonEmptyMap that contains all the elements of this NonEmptyMap followed by all elements of other.
def ++:[V1 >: V](other: Vector[(K, V1)]): NonEmptyMap[K, V1]
As with ++, returns a new NonEmptyMap containing the entries of this NonEmptyMap and the entries of the passed Vector.
As with ++, returns a new NonEmptyMap containing the entries of this NonEmptyMap and the entries of the passed Vector. The entry type of the resulting NonEmptyMap is the most specific superclass encompassing the entry types of this NonEmptyMap and the passed Vector.
It differs from ++ in that the right operand determines the type of the resulting collection rather than the left one. Mnemonic: the COLon is on the side of the new COLlection type.
V1
the value type of the returned NonEmptyMap
other
the Vector to append
returns
a new NonEmptyMap that contains all the entries of this NonEmptyMap and all elements of other.
def ++:[V1 >: V](other: NonEmptyMap[K, V1]): NonEmptyMap[K, V1]
As with ++, returns a new NonEmptyMap containing the entries of this NonEmptyMap and the entries of the passed NonEmptyMap.
As with ++, returns a new NonEmptyMap containing the entries of this NonEmptyMap and the entries of the passed NonEmptyMap. The entry type of the resulting NonEmptyMap is the most specific superclass encompassing the entry types of this and the passed NonEmptyMap.
It differs from ++ in that the right operand determines the type of the resulting collection rather than the left one. Mnemonic: the COLon is on the side of the new COLlection type.
V1
the value type of the returned NonEmptyMap
other
the NonEmptyMap to add
returns
a new NonEmptyMap that contains all the elements of this NonEmptyMap and all elements of other.
def +:[V1 >: V](entry: (K, V1)): NonEmptyMap[K, V1]
Returns a new NonEmptyMap with the given entry added.
Returns a new NonEmptyMap with the given entry added.
Note that :-ending operators are right associative. A mnemonic for +: vs. :+ is: the COLon goes on the COLlection side.
entry
the element to add to this NonEmptyMap
returns
a new NonEmptyMap consisting of element followed by all elements of this NonEmptyMap.
final def ==(arg0: Any): Boolean
Definition Classes
Any
def addString(sb: StringBuilder, start: String, sep: String, end: String): StringBuilder
Appends all entries of this NonEmptyMap to a string builder using start, end, and separator strings.
Appends all entries of this NonEmptyMap to a string builder using start, end, and separator strings. The written text will consist of a concatenation of the string start; the result of invoking toString on all elements of this NonEmptyMap, separated by the string sep; and the string end
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.
def addString(sb: StringBuilder, sep: String): StringBuilder
Appends all entries of this NonEmptyMap to a string builder using a separator string.
Appends all entries of this NonEmptyMap to a string builder using a separator string. The written text will consist of a concatenation of the result of invoking toString on of every element of this NonEmptyMap, separated by the string sep.
sb
the string builder to which entries will be appended
sep
the separator string
returns
the string builder, sb, to which elements were appended.
def addString(sb: StringBuilder): StringBuilder
Appends all entries of this NonEmptyMap to a string builder.
Appends all entries of this NonEmptyMap to a string builder. The written text will consist of a concatenation of the result of invoking toString on of every entry of this NonEmptyMap, without any separator string.
sb
the string builder to which entries will be appended
returns
the string builder, sb, to which entries were appended.
def apply(k: K): V
Selects an value by its key in the NonEmptyMap.
Selects an value by its key in the NonEmptyMap.
returns
the value of this NonEmptyMap at key k.
final def asInstanceOf[T0]: T0
Definition Classes
Any
def collectFirst[U](pf: PartialFunction[(K, V), U]): Option[U]
Finds the first entry of this NonEmptyMap for which the given partial function is defined, if any, and applies the partial function to it.
Finds the first entry of this NonEmptyMap for which the given partial function is defined, if any, and applies the partial function to it.
pf
the partial function
returns
an Option containing pf applied to the first entry for which it is defined, or None if the partial function was not defined for any entry.
def contains(key: K): Boolean
Indicates whether this NonEmptyMap contains a binding for given key.
Indicates whether this NonEmptyMap contains a binding for given key.
key
the key to look for
returns
true if this NonEmptyMap has a binding that is equal (as determined by ==) to key, false otherwise.
def copyToArray[V1 >: V](arr: Array[(K, V1)], start: Int, len: Int): Unit
Copies entries of this NonEmptyMap to an array.
Copies entries of this NonEmptyMap to an array. Fills the given array arr with at most len entries of this NonEmptyMap, beginning at index start. Copying will stop once either the end of the current NonEmptyMap is reached, the end of the array is reached, or len elements have been copied.
arr
the array to fill
start
the starting index
len
the maximum number of elements to copy
def copyToArray[V1 >: V](arr: Array[(K, V1)], start: Int): Unit
Copies entries of this NonEmptyMap to an array.
Copies entries of this NonEmptyMap to an array. Fills the given array arr with entries of this NonEmptyMap, beginning at index start. Copying will stop once either the end of the current NonEmptyMap is reached, or the end of the array is reached.
arr
the array to fill
start
the starting index
def copyToArray[V1 >: V](arr: Array[(K, V1)]): Unit
Copies entries of this NonEmptyMap to an array.
Copies entries of this NonEmptyMap to an array. Fills the given array arr with entries of this NonEmptyMap. Copying will stop once either the end of the current NonEmptyMap is reached, or the end of the array is reached.
arr
the array to fill
def copyToBuffer[V1 >: V](buf: Buffer[(K, V1)]): Unit
Copies all elements of this NonEmptyMap to a buffer.
Copies all elements of this NonEmptyMap to a buffer.
buf
the buffer to which elements are copied
def count(p: ((K, V)) => Boolean): Int
Counts the number of elements in this NonEmptyMap that satisfy a predicate.
Counts the number of elements in this NonEmptyMap that satisfy a predicate.
p
the predicate used to test elements.
returns
the number of elements satisfying the predicate p.
def exists(p: ((K, V)) => Boolean): Boolean
Indicates whether a predicate holds for at least one of the entries of this NonEmptyMap.
Indicates whether a predicate holds for at least one of the entries of this NonEmptyMap.
p
the predicate used to test entries.
returns
true if the given predicate p holds for some of the entries of this NonEmptyMap, otherwise false.
def find(p: ((K, V)) => Boolean): Option[(K, V)]
Finds the first entry of this NonEmptyMap that satisfies the given predicate, if any.
Finds the first entry of this NonEmptyMap that satisfies the given predicate, if any.
p
the predicate used to test elements
returns
an Some containing the first element in this NonEmptyMap that satisfies p, or None if none exists.
def flatMap[K1, V1](f: ((K, V)) => NonEmptyMap[K1, V1]): NonEmptyMap[K1, V1]
Builds a new NonEmptyMap by applying a function to all entries of this NonEmptyMap and using the entries of the resulting NonEmptyMaps.
Builds a new NonEmptyMap by applying a function to all entries of this NonEmptyMap and using the entries of the resulting NonEmptyMaps.
K1
the key type of the returned NonEmptyMap
V1
the value type of the returned NonEmptyMap
f
the function to apply to each entry.
returns
a new NonEmptyMap containing entries obtained by applying the given function f to each entry of this NonEmptyMap and concatenating the entries of resulting NonEmptyMaps.
def fold[U >: (K, V)](z: U)(op: (U, U) => U): U
Folds the entries of this NonEmptyMap using the specified associative binary operator.
Folds the entries of this NonEmptyMap using the specified associative binary operator.
The order in which operations are performed on entries is unspecified and may be nondeterministic.
U
a type parameter for the binary operator, a supertype of (K, V).
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 list 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 and z
def foldLeft[B](z: B)(op: (B, (K, V)) => B): B
Applies a binary operator to a start value and all elements of this NonEmptyMap, going left to right.
Applies a binary operator to a start value and all elements of this NonEmptyMap, 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 entries of this NonEmptyMap, going left to right, with the start value, z, on the left:
```
op(...op(op(z, x_1), x_2), ..., x_n)
```
where x₁, ..., x_n are the elements of this NonEmptyMap.
def foldRight[B](z: B)(op: ((K, V), B) => B): B
Applies a binary operator to all entries of this NonEmptyMap and a start value, going right to left.
Applies a binary operator to all entries of this NonEmptyMap 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 entries of this NonEmptyMap, going right to left, with the start value, z, on the right:
```
op(x_1, op(x_2, ... op(x_n, z)...))
```
where x₁, ..., x_n are the elements of this NonEmptyMap.
def forall(p: ((K, V)) => Boolean): Boolean
Indicates whether a predicate holds for all entries of this NonEmptyMap.
Indicates whether a predicate holds for all entries of this NonEmptyMap.
p
the predicate used to test entries.
returns
true if the given predicate p holds for all entries of this NonEmptyMap, otherwise false.
def foreach(f: ((K, V)) => Unit): Unit
Applies a function f to all entries of this NonEmptyMap.
Applies a function f to all entries of this NonEmptyMap.
f
the function that is applied for its side-effect to every entry. The result of function f is discarded.
def getClass(): Class[_ <: AnyVal]
Definition Classes
AnyVal → Any
def groupBy(f: ((K, V)) => K): Map[K, NonEmptyMap[K, V]]
Partitions this NonEmptyMap into a map of NonEmptyMaps according to some discriminator function.
Partitions this NonEmptyMap into a map of NonEmptyMaps according to some discriminator function.
f
the discriminator function.
returns
A map from keys to NonEmptyMaps such that the following invariant holds:
```
(nonEmptyMap.toMap partition f)(k) = xs filter (x => f(x) == k)
```
That is, every key k is bound to a NonEmptyMap of those elements x for which f(x) equals k.
def grouped(size: Int): Iterator[NonEmptyMap[K, V]]
Partitions entries into fixed size NonEmptyMaps.
Partitions entries into fixed size NonEmptyMaps.
size
the number of entries per group
returns
An iterator producing NonEmptyMaps of size size, except the last will be truncated if the entries don't divide evenly.
def hasDefiniteSize: Boolean
Returns true to indicate this NonEmptyMap has a definite size, since all NonEmptyMaps are strict collections.
def head: (K, V)
Selects the first element of this NonEmptyMap.
Selects the first element of this NonEmptyMap.
returns
the first element of this NonEmptyMap.
def isDefinedAt(key: K): Boolean
Tests whether this NonEmptyMap contains given key.
Tests whether this NonEmptyMap contains given key.
key
the key to test
returns
true if this NonEmptyMap contains a binding for the given key, false otherwise.
def isEmpty: Boolean
Returns false to indicate this NonEmptyMap, like all NonEmptyMaps, is non-empty.
Returns false to indicate this NonEmptyMap, like all NonEmptyMaps, is non-empty.
returns
false
final def isInstanceOf[T0]: Boolean
Definition Classes
Any
def isTraversableAgain: Boolean
Returns true to indicate this NonEmptyMap, like all NonEmptyMaps, can be traversed repeatedly.
Returns true to indicate this NonEmptyMap, like all NonEmptyMaps, can be traversed repeatedly.
returns
true
def iterator: Iterator[(K, V)]
Creates and returns a new iterator over all elements contained in this NonEmptyMap.
Creates and returns a new iterator over all elements contained in this NonEmptyMap.
returns
the new iterator
def keySet: NonEmptySet[K]
def last: (K, V)
Selects the last entry of this NonEmptyMap.
Selects the last entry of this NonEmptyMap.
returns
the last entry of this NonEmptyMap.
def map[K1, V1](f: ((K, V)) => (K1, V1)): NonEmptyMap[K1, V1]
Builds a new NonEmptyMap by applying a function to all entries of this NonEmptyMap.
Builds a new NonEmptyMap by applying a function to all entries of this NonEmptyMap.
K1
the key type of the returned NonEmptyMap.
V1
the value type of the returned NonEmptyMap.
f
the function to apply to each element.
returns
a new NonEmptyMap resulting from applying the given function f to each element of this NonEmptyMap and collecting the results.
def max[U >: (K, V)](implicit cmp: Ordering[U]): (K, V)
Finds the largest entry.
Finds the largest entry.
returns
the largest entry of this NonEmptyMap.
def maxBy[U](f: ((K, V)) => U)(implicit cmp: Ordering[U]): (K, V)
Finds the largest result after applying the given function to every entry.
Finds the largest result after applying the given function to every entry.
returns
the largest result of applying the given function to every entry of this NonEmptyMap.
def min[U >: (K, V)](implicit cmp: Ordering[U]): (K, V)
Finds the smallest entry.
Finds the smallest entry.
returns
the smallest entry of this NonEmptyMap.
def minBy[U](f: ((K, V)) => U)(implicit cmp: Ordering[U]): (K, V)
Finds the smallest result after applying the given function to every entry.
Finds the smallest result after applying the given function to every entry.
returns
the smallest result of applying the given function to every entry of this NonEmptyMap.
def mkString(start: String, sep: String, end: String): String
Displays all entries of this NonEmptyMap in a string using start, end, and separator strings.
Displays all entries of this NonEmptyMap 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 NonEmptyMap. The resulting string begins with the string start and ends with the string end. Inside, In the resulting string, the result of invoking toString on all entries of this NonEmptyMap are separated by the string sep.
def mkString(sep: String): String
Displays all entries of this NonEmptyMap in a string using a separator string.
Displays all entries of this NonEmptyMap in a string using a separator string.
sep
the separator string
returns
a string representation of this NonEmptyMap. In the resulting string, the result of invoking toString on all entries of this NonEmptyMap are separated by the string sep.
def mkString: String
Displays all entries of this NonEmptyMap in a string.
Displays all entries of this NonEmptyMap in a string.
returns
a string representation of this NonEmptyMap. In the resulting string, the result of invoking toString on all entries of this NonEmptyMap follow each other without any separator string.
def nonEmpty: Boolean
Returns true to indicate this NonEmptyMap, like all NonEmptyMaps, is non-empty.
Returns true to indicate this NonEmptyMap, like all NonEmptyMaps, is non-empty.
returns
true
def product[U >: (K, V)](implicit num: Numeric[U]): U
The result of multiplying all the entries of this NonEmptyMap.
The result of multiplying all the entries of this NonEmptyMap.
This method can be invoked for any NonEmptyMap[T] for which an implicit Numeric[T] exists.
returns
the product of all elements
def reduce[U >: (K, V)](op: (U, U) => U): U
Reduces the entries of this NonEmptyMap using the specified associative binary operator.
Reduces the entries of this NonEmptyMap using the specified associative binary operator.
The order in which operations are performed on entries 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 this NonEmptyMap.
def reduceLeft[U >: (K, V)](op: (U, (K, V)) => U): U
Applies a binary operator to all entries of this NonEmptyMap, going left to right.
Applies a binary operator to all entries of this NonEmptyMap, going left to right.
U
the result type of the binary operator.
op
the binary operator.
returns
the result of inserting op between consecutive entries of this NonEmptyMap, going left to right:
```
op(...op(op(x_1, x_2), x_3), ..., x_n)
```
where x₁, ..., x_n are the elements of this NonEmptyMap.
def reduceLeftOption[U >: (K, V)](op: (U, (K, V)) => U): Option[U]
Applies a binary operator to all entries of this NonEmptyMap, going left to right, returning the result in a Some.
Applies a binary operator to all entries of this NonEmptyMap, going left to right, returning the result in a Some.
U
the result type of the binary operator.
op
the binary operator.
returns
a Some containing the result of reduceLeft(op)
def reduceOption[U >: (K, V)](op: (U, U) => U): Option[U]
def reduceRight[U >: (K, V)](op: ((K, V), U) => U): U
Applies a binary operator to all entries of this NonEmptyMap, going right to left.
Applies a binary operator to all entries of this NonEmptyMap, going right to left.
U
the result of the binary operator
op
the binary operator
returns
the result of inserting op between consecutive entries of this NonEmptyMap, going right to left:
```
op(x_1, op(x_2, ... op(x_{n-1}, x_n)...))
```
where x₁, ..., x_n are the entries of this NonEmptyMap.
def reduceRightOption[U >: (K, V)](op: ((K, V), U) => U): Option[U]
Applies a binary operator to all entries of this NonEmptyMap, going right to left, returning the result in a Some.
Applies a binary operator to all entries of this NonEmptyMap, going right to left, returning the result in a Some.
U
the result of the binary operator
op
the binary operator
returns
a Some containing the result of reduceRight(op)
def sameElements[V1 >: V](that: NonEmptyMap[K, V1]): Boolean
Checks if the given NonEmptyMap contains the same entries in the same order as this NonEmptyMap.
Checks if the given NonEmptyMap contains the same entries in the same order as this NonEmptyMap.
that
the NonEmptyMap with which to compare
returns
true, if both this and the given NonEmptyMap contain the same entries in the same order, false otherwise.
def scan[V1 >: V](z: (K, V1))(op: ((K, V1), (K, V1)) => (K, V1)): NonEmptyMap[K, V1]
Computes a prefix scan of the entries of this NonEmptyMap.
Computes a prefix scan of the entries of this NonEmptyMap.
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 list concatenation, 0 for addition, or 1 for multiplication.)
op
a binary operator that must be associative
returns
a new NonEmptyMap containing the prefix scan of the elements in this NonEmptyMap
Note
The neutral element z may be applied more than once.
def size: Int
The size of this NonEmptyMap.
The size of this NonEmptyMap.
returns
the number of elements in this NonEmptyMap.
Note
length and size yield the same result, which will be >= 1.
def sliding(size: Int, step: Int): Iterator[NonEmptyMap[K, V]]
Groups entries 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 entries 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 entries per group
step
the distance between the first entries of successive groups
returns
an iterator producing NonEmptyMaps of size size, except the last and the only element will be truncated if there are fewer elements than size.
def sliding(size: Int): Iterator[NonEmptyMap[K, V]]
Groups entries in fixed size blocks by passing a “sliding window” over them (as opposed to partitioning them, as is done in grouped.)
Groups entries 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 entries per group
returns
an iterator producing NonEmptyMaps of size size, except the last and the only element will be truncated if there are fewer entries than size.
def stringPrefix: String
Returns "NonEmptyMap", the prefix of this object's toString representation.
Returns "NonEmptyMap", the prefix of this object's toString representation.
returns
the string "NonEmptyMap"
def sum[U >: (K, V)](implicit num: Numeric[U]): U
The result of summing all the elements of this NonEmptyMap.
The result of summing all the elements of this NonEmptyMap.
This method can be invoked for any NonEmptyMap[T] for which an implicit Numeric[T] exists.
returns
the sum of all elements
def tail: Map[K, V]
def to[C1](factory: Factory[(K, V), C1]): C1
Converts this NonEmptyMap into a collection of type Col by copying all entries.
Converts this NonEmptyMap into a collection of type Col by copying all entries.
C1
the collection type to build.
returns
a new collection containing all entries of this NonEmptyMap.
def toArray[U >: (K, V)](implicit classTag: ClassTag[U]): Array[U]
Converts this NonEmptyMap to an array.
Converts this NonEmptyMap to an array.
returns
an array containing all entries of this NonEmptyMap. A ClassTag must be available for the entry type of this NonEmptyMap.
def toBuffer[U >: (K, V)]: Buffer[U]
Converts this NonEmptyMap to a mutable buffer.
Converts this NonEmptyMap to a mutable buffer.
returns
a buffer containing all entries of this NonEmptyMap.
def toIndexedSeq: IndexedSeq[(K, V)]
Converts this NonEmptyMap to an immutable IndexedSeq.
Converts this NonEmptyMap to an immutable IndexedSeq.
returns
an immutable IndexedSeq containing all entries of this NonEmptyMap.
def toIterable: Iterable[(K, V)]
Converts this NonEmptyMap to an iterable collection.
Converts this NonEmptyMap to an iterable collection.
returns
an Iterable containing all entries of this NonEmptyMap.
def toIterator: Iterator[(K, V)]
Returns an Iterator over the entries in this NonEmptyMap.
Returns an Iterator over the entries in this NonEmptyMap.
returns
an Iterator containing all entries of this NonEmptyMap.
val toMap: Map[K, V]
def toSeq: Seq[(K, V)]
Converts this NonEmptyMap to an immutable IndexedSeq.
Converts this NonEmptyMap to an immutable IndexedSeq.
returns
an immutable IndexedSeq containing all entries of this NonEmptyMap.
def toSet[U >: (K, V)]: Set[U]
Converts this NonEmptyMap to a set.
Converts this NonEmptyMap to a set.
returns
a set containing all entries of this NonEmptyMap.
def toString(): String
Returns a string representation of this NonEmptyMap.
Returns a string representation of this NonEmptyMap.
returns
the string "NonEmptyMap" followed by the result of invoking toString on this NonEmptyMap's elements, surrounded by parentheses.
Definition Classes
NonEmptyMap → Any
def toVector: Vector[(K, V)]
Converts this NonEmptyMap to a Vector.
Converts this NonEmptyMap to a Vector.
returns
a Vector containing all entries of this NonEmptyMap.
def unzip[L, R](implicit asPair: ((K, V)) => (L, R)): (Iterable[L], Iterable[R])
Converts this NonEmptyMap of pairs into two Iterables of the first and second half of each pair.
Converts this NonEmptyMap of pairs into two Iterables 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 NonEmptyMap is a pair.
returns
a pair of NonEmptyMaps, containing the first and second half, respectively, of each element pair of this NonEmptyMap.
def unzip3[L, M, R](implicit asTriple: ((K, V)) => (L, M, R)): (Iterable[L], Iterable[M], Iterable[R])
Converts this NonEmptyMap of triples into three NonEmptyMaps of the first, second, and and third entry of each triple.
Converts this NonEmptyMap of triples into three NonEmptyMaps of the first, second, and and third entry of each triple.
L
the type of the first member of the entry triples
R
the type of the third member of the entry triples
asTriple
an implicit conversion that asserts that the entry type of this NonEmptyMap is a triple.
returns
a triple of NonEmptyMaps, containing the first, second, and third member, respectively, of each entry triple of this NonEmptyMap.
def updated[V1 >: V](key: K, value: V1): NonEmptyMap[K, V1]
A copy of this NonEmptyMap with one single replaced entry.
A copy of this NonEmptyMap with one single replaced entry.
key
the key of the replacement
value
the replacing value
returns
a copy of this NonEmptyMap with the value at key replaced by the given value.
def zipAll[O, V1 >: V](other: Iterable[O], thisElem: (K, V1), otherElem: O): NonEmptyMap[(K, V1), O]
Returns a NonEmptyMap formed from this NonEmptyMap and an iterable collection by combining corresponding entries in pairs.
Returns a NonEmptyMap formed from this NonEmptyMap and an iterable collection by combining corresponding entries in pairs. If one of the two collections is shorter than the other, placeholder entries will be used to extend the shorter collection to the length of the longer.
O
the type of the second half of the returned pairs
V1
the subtype of the value type of this NonEmptyMap
other
the Iterable providing the second half of each result pair
thisElem
the element to be used to fill up the result if this NonEmptyMap is shorter than that Iterable.
otherElem
the element to be used to fill up the result if that Iterable is shorter than this NonEmptyMap.
returns
a new NonEmptyMap containing pairs consisting of corresponding entries of this NonEmptyMap and that. The length of the returned collection is the maximum of the lengths of this NonEmptyMap and that. If this NonEmptyMap is shorter than that, thisElem values are used to pad the result. If that is shorter than this NonEmptyMap, thatElem values are used to pad the result.
def zipWithIndex[V1 >: V]: NonEmptyMap[(K, V1), Int]
Zips this NonEmptyMap with its indices.
Zips this NonEmptyMap with its indices.
returns
A new NonEmptyMap containing pairs consisting of all elements of this NonEmptyMap paired with their index. Indices start at 0.

Packages

NonEmptyMap

Companion object NonEmptyMap

final class NonEmptyMap[K, +V] extends AnyVal

Constructing `NonEmptyMap`s

Working with `NonEmptyMap`s

Value Members

Inherited from AnyVal

Inherited from Any

Ungrouped

Packages

NonEmptyMap

Companion object NonEmptyMap

final class NonEmptyMap[K, +V] extends AnyVal

Constructing NonEmptyMaps

Working with NonEmptyMaps

Value Members

Inherited from AnyVal

Inherited from Any

Ungrouped

NonEmptyMap

Constructing `NonEmptyMap`s

Working with `NonEmptyMap`s