Function
A module defining utility methods for higher-order functional programming.
Attributes
- Source
- Function.scala
- Graph
-
- Supertypes
- Self type
-
Function.type
Members list
Value members
Concrete methods
Given a sequence of functions f,,1,,, ..., f,,n,,, return the function f,,1,, andThen ... andThen f,,n,,.
Given a sequence of functions f,,1,,, ..., f,,n,,, return the function f,,1,, andThen ... andThen f,,n,,.
Type parameters
- T
-
the common input and output type of the functions in the chain
Value parameters
- fs
-
the given sequence of functions
Attributes
- Source
- Function.scala
The constant function.
The constant function.
Type parameters
- T
-
the return type
- U
-
the type of the argument to ignore
Value parameters
- x
-
the constant value to return
- y
-
the argument that is ignored
Attributes
- Source
- Function.scala
Tupling for functions of arity 2. This transforms a function of arity 2 into a unary function that takes a pair of arguments.
Tupling for functions of arity 2. This transforms a function of arity 2 into a unary function that takes a pair of arguments.
Attributes
- Note
-
These functions are slotted for deprecation, but it is on hold pending superior type inference for tupling anonymous functions.
- Source
- Function.scala
Tupling for functions of arity 3. This transforms a function of arity 3 into a unary function that takes a triple of arguments.
Tupling for functions of arity 3. This transforms a function of arity 3 into a unary function that takes a triple of arguments.
Attributes
- Source
- Function.scala
Tupling for functions of arity 4. This transforms a function of arity 4 into a unary function that takes a 4-tuple of arguments.
Tupling for functions of arity 4. This transforms a function of arity 4 into a unary function that takes a 4-tuple of arguments.
Attributes
- Source
- Function.scala
Tupling for functions of arity 5. This transforms a function of arity 5 into a unary function that takes a 5-tuple of arguments.
Tupling for functions of arity 5. This transforms a function of arity 5 into a unary function that takes a 5-tuple of arguments.
Attributes
- Source
- Function.scala
Uncurrying for functions of arity 2. This transforms a unary function returning another unary function into a function of arity 2.
Uncurrying for functions of arity 2. This transforms a unary function returning another unary function into a function of arity 2.
Type parameters
- R
-
the result type
- T1
-
the type of the 1st argument
- T2
-
the type of the 2nd argument
Value parameters
- f
-
the curried function to uncurry
Attributes
- Source
- Function.scala
Uncurrying for functions of arity 3.
Uncurrying for functions of arity 3.
Type parameters
- R
-
the result type
- T1
-
the type of the 1st argument
- T2
-
the type of the 2nd argument
- T3
-
the type of the 3rd argument
Value parameters
- f
-
the curried function to uncurry
Attributes
- Source
- Function.scala
Uncurrying for functions of arity 4.
Uncurrying for functions of arity 4.
Type parameters
- R
-
the result type
- T1
-
the type of the 1st argument
- T2
-
the type of the 2nd argument
- T3
-
the type of the 3rd argument
- T4
-
the type of the 4th argument
Value parameters
- f
-
the curried function to uncurry
Attributes
- Source
- Function.scala
Uncurrying for functions of arity 5.
Uncurrying for functions of arity 5.
Type parameters
- R
-
the result type
- T1
-
the type of the 1st argument
- T2
-
the type of the 2nd argument
- T3
-
the type of the 3rd argument
- T4
-
the type of the 4th argument
- T5
-
the type of the 5th argument
Value parameters
- f
-
the curried function to uncurry
Attributes
- Source
- Function.scala
Turns a function A => Option[B] into a PartialFunction[A, B].
Turns a function A => Option[B] into a PartialFunction[A, B].
Important note: this transformation implies the original function may be called 2 or more times on each logical invocation, because the only way to supply an implementation of isDefinedAt is to call the function and examine the return value. See also scala.PartialFunction, method applyOrElse.
Type parameters
- R
-
the result type
- T
-
the input type of the function
Value parameters
- f
-
a function
T => Option[R]
Attributes
- Returns
-
a partial function defined for those inputs where f returns
Some(_)and undefined wherefreturnsNone. - See also
-
scala.PartialFunction, method
lift. - Source
- Function.scala
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.
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.
Type parameters
- R
-
the result type
- T1
-
the type of the 1st argument
- T2
-
the type of the 2nd argument
Value parameters
- f
-
the tupled function to untuple
Attributes
- Source
- Function.scala
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.
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.
Type parameters
- R
-
the result type
- T1
-
the type of the 1st argument
- T2
-
the type of the 2nd argument
- T3
-
the type of the 3rd argument
Value parameters
- f
-
the tupled function to untuple
Attributes
- Source
- Function.scala
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.
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.
Type parameters
- R
-
the result type
- T1
-
the type of the 1st argument
- T2
-
the type of the 2nd argument
- T3
-
the type of the 3rd argument
- T4
-
the type of the 4th argument
Value parameters
- f
-
the tupled function to untuple
Attributes
- Source
- Function.scala
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.
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.
Type parameters
- R
-
the result type
- T1
-
the type of the 1st argument
- T2
-
the type of the 2nd argument
- T3
-
the type of the 3rd argument
- T4
-
the type of the 4th argument
- T5
-
the type of the 5th argument
Value parameters
- f
-
the tupled function to untuple
Attributes
- Source
- Function.scala