Majabigwaduce
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Majabigwaduce/com.phasmid.majabigwaduce/com.phasmid.majabigwaduce.core/Reduce

Reduce

com.phasmid.majabigwaduce.core.Reduce
case class Reduce[K, T, S](f: (S, T) => S)(using evidence$1: Zero[S]) extends Map[K, T] => S

A reduce function which can be composed (on the right) with a MapReduce object.

Type parameters

S

the output (derived) type of this reduction

T

the input (free) type of this reduction

Value parameters

f

the function which will combine the current result with each element of an input set

Attributes

Graph
Supertypes
trait Serializable
trait Product
trait Equals
trait Map[K, T] => S
class Object
trait Matchable
class Any
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Members list

Value members

Concrete methods

def apply(m: Map[K, T]): S

This method cannot use reduce because, logically, reduce is not able to process an empty collection. Note that we ignore the keys of the input map (m)

This method cannot use reduce because, logically, reduce is not able to process an empty collection. Note that we ignore the keys of the input map (m)

Value parameters

m

the input map (keys will be ignored)

Attributes

Returns

the result of combining all values of m, using the f function. An empty map will result in the value of z() being returned.

Inherited methods

def andThen[A](g: S => A): Map[K, T] => A

Composes two instances of Function1 in a new Function1, with this function applied first.

Composes two instances of Function1 in a new Function1, with this function applied first.

Type parameters

A

the result type of function g

Value parameters

g

a function R => A

Attributes

Returns

a new function f such that f(x) == g(apply(x))

Inherited from:
Function1
def compose[A](g: A => Map[K, T]): A => S

Composes two instances of Function1 in a new Function1, with this function applied last.

Composes two instances of Function1 in a new Function1, with this function applied last.

Type parameters

A

the type to which function g can be applied

Value parameters

g

a function A => T1

Attributes

Returns

a new function f such that f(x) == apply(g(x))

Inherited from:
Function1
def productElementNames: Iterator[String]

An iterator over the names of all the elements of this product.

An iterator over the names of all the elements of this product.

Attributes

Inherited from:
Product
def productIterator: Iterator[Any]

An iterator over all the elements of this product.

An iterator over all the elements of this product.

Attributes

Returns

in the default implementation, an Iterator[Any]

Inherited from:
Product
override def toString(): String

Returns a string representation of the object.

Returns a string representation of the object.

The default representation is platform dependent.

Attributes

Returns

a string representation of the object.

Definition Classes
Function1 -> Any
Inherited from:
Function1
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