scala

Function

object Function extends AnyRef

A module defining utility methods for higher-order functional programming.

Inherits

  1. AnyRef
  2. Any

Value Members

  1. def chain[a](fs: Seq[(a) ⇒ a]): (a) ⇒ a

    Given a sequence of functions f1,

    Given a sequence of functions f1, ..., fn, return the function f1 andThen ... andThen fn.

    fs

    The given sequence of functions

    returns

    ...

  2. def const[T, U](x: T)(y: U): T

    The constant function

    The constant function

  3. def curried[a1, a2, a3, a4, a5, b](f: (a1, a2, a3, a4, a5) ⇒ b): (a1) ⇒ (a2) ⇒ (a3) ⇒ (a4) ⇒ (a5) ⇒ b

    Currying for functions of arity 5

    Currying for functions of arity 5.

  4. def curried[a1, a2, a3, a4, b](f: (a1, a2, a3, a4) ⇒ b): (a1) ⇒ (a2) ⇒ (a3) ⇒ (a4) ⇒ b

    Currying for functions of arity 4

    Currying for functions of arity 4.

  5. def curried[a1, a2, a3, b](f: (a1, a2, a3) ⇒ b): (a1) ⇒ (a2) ⇒ (a3) ⇒ b

    Currying for functions of arity 3

    Currying for functions of arity 3.

    f

    ...

    returns

    ...

  6. def curried[a1, a2, b](f: (a1, a2) ⇒ b): (a1) ⇒ (a2) ⇒ b

    Currying for functions of arity 2

    Currying for functions of arity 2. This transforms a function of arity 2 into a a unary function returning another unary function.

    f

    ...

    returns

    ...

  7. def equals(arg0: Any): Boolean

    This method is used to compare the receiver object (this) with the argument object (arg0) for equivalence

    This method is used to compare the receiver object (this) with the argument object (arg0) for equivalence.

    The default implementations of this method is an equivalence relation:

    • It is reflexive: for any instance x of type Any, x.equals(x) should return true.
    • It is symmetric: for any instances x and y of type Any, x.equals(y) should return true if and only if y.equals(x) returns true.
    • It is transitive: for any instances x, y, and z of type AnyRef if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.

    If you override this method, you should verify that your implementation remains an equivalence relation. Additionally, when overriding this method it is often necessary to override hashCode to ensure that objects that are "equal" (o1.equals(o2) returns true) hash to the same Int (o1.hashCode.equals(o2.hashCode)).

    arg0

    the object to compare against this object for equality.

    returns

    true if the receiver object is equivalent to the argument; false otherwise.

    definition classes: AnyRef ⇐ Any
  8. def hashCode(): Int

    Returns a hash code value for the object

    Returns a hash code value for the object.

    The default hashing algorithm is platform dependent.

    Note that it is allowed for two objects to have identical hash codes (o1.hashCode.equals(o2.hashCode)) yet not be equal (o1.equals(o2) returns false). A degenerate implementation could always return 0. However, it is required that if two objects are equal (o1.equals(o2) returns true) that they have identical hash codes (o1.hashCode.equals(o2.hashCode)). Therefore, when overriding this method, be sure to verify that the behavior is consistent with the equals method.

    definition classes: AnyRef ⇐ Any
  9. def toString(): String

    Returns a string representation of the object

    Returns a string representation of the object.

    The default representation is platform dependent.

    definition classes: AnyRef ⇐ Any
  10. def tupled[a1, a2, a3, a4, a5, b](f: (a1, a2, a3, a4, a5) ⇒ b): ((a1, a2, a3, a4, a5)) ⇒ b

    Tupling for functions of arity 5

    Tupling for functions of arity 5. This transforms a function of arity 5 into a unary function that takes a 5-tuple of arguments.

  11. def tupled[a1, a2, a3, a4, b](f: (a1, a2, a3, a4) ⇒ b): ((a1, a2, a3, a4)) ⇒ b

    Tupling for functions of arity 4

    Tupling for functions of arity 4. This transforms a function of arity 4 into a unary function that takes a 4-tuple of arguments.

  12. def tupled[a1, a2, a3, b](f: (a1, a2, a3) ⇒ b): ((a1, a2, a3)) ⇒ b

    Tupling for functions of arity 3

    Tupling for functions of arity 3. This transforms a function of arity 3 into a unary function that takes a triple of arguments.

  13. def tupled[a1, a2, b](f: (a1, a2) ⇒ b): ((a1, a2)) ⇒ b

    Tupling for functions of arity 2

    Tupling for functions of arity 2. This transforms a function of arity 2 into a unary function that takes a pair of arguments.

    f

    ...

    returns

    ...

  14. def uncurried[a1, a2, a3, a4, a5, b](f: (a1) ⇒ (a2) ⇒ (a3) ⇒ (a4) ⇒ (a5) ⇒ b): (a1, a2, a3, a4, a5) ⇒ b

    Uncurrying for functions of arity 5

    Uncurrying for functions of arity 5.

  15. def uncurried[a1, a2, a3, a4, b](f: (a1) ⇒ (a2) ⇒ (a3) ⇒ (a4) ⇒ b): (a1, a2, a3, a4) ⇒ b

    Uncurrying for functions of arity 4

    Uncurrying for functions of arity 4.

  16. def uncurried[a1, a2, a3, b](f: (a1) ⇒ (a2) ⇒ (a3) ⇒ b): (a1, a2, a3) ⇒ b

    Uncurrying for functions of arity 3

    Uncurrying for functions of arity 3.

  17. def uncurried[a1, a2, b](f: (a1) ⇒ (a2) ⇒ b): (a1, a2) ⇒ b

    Uncurrying for functions of arity 2

    Uncurrying for functions of arity 2. This transforms a unary function returning another unary function into a function of arity 2.

  18. def untupled[a1, a2, a3, a4, a5, b](f: ((a1, a2, a3, a4, a5)) ⇒ b): (a1, a2, a3, a4, a5) ⇒ b

    Un-tupling for functions of arity 5

    Un-tupling for functions of arity 5. This transforms a function taking a 5-tuple of arguments into a function of arity 5 which takes each argument separately.

  19. def untupled[a1, a2, a3, a4, b](f: ((a1, a2, a3, a4)) ⇒ b): (a1, a2, a3, a4) ⇒ b

    Un-tupling for functions of arity 4

    Un-tupling for functions of arity 4. This transforms a function taking a 4-tuple of arguments into a function of arity 4 which takes each argument separately.

  20. def untupled[a1, a2, a3, b](f: ((a1, a2, a3)) ⇒ b): (a1, a2, a3) ⇒ b

    Un-tupling for functions of arity 3

    Un-tupling for functions of arity 3. This transforms a function taking a triple of arguments into a ternary function which takes each argument separately.

  21. def untupled[a1, a2, b](f: ((a1, a2)) ⇒ b): (a1, a2) ⇒ b

    Un-tupling for functions of arity 2

    Un-tupling for functions of arity 2. This transforms a function taking a pair of arguments into a binary function which takes each argument separately.