A few handy operations which leverage the extra bit of information available in partial functions. Examples:
import PartialFunction._def strangeConditional(other: Any): Boolean = cond(other) { case x: String if x == "abc" || x == "def" => true case x: Int => true}def onlyInt(v: Any): Option[Int] = condOpt(v) { case x: Int => x }Attributes
- Companion
- trait
- Source
- PartialFunction.scala
- Graph
- Supertypes
- Self type
- PartialFunction.type
Members list
Type members
Classlikes
Attributes
- Source
- PartialFunction.scala
- Supertypes
Value members
Concrete methods
A Boolean test that is the result of the given function where defined, and false otherwise.
A Boolean test that is the result of the given function where defined, and false otherwise.
It behaves like acase _ => false were added to the partial function.
Value parameters
- pf
the partial function
- x
the value to test
Attributes
- Returns
true, iff
xis in the domain ofpfandpf(x) == true.- Source
- PartialFunction.scala
Apply the function to the given value if defined, and return the result in aSome; otherwise, returnNone.
Apply the function to the given value if defined, and return the result in aSome; otherwise, returnNone.
Value parameters
- pf
the PartialFunction[T, U]
- x
the value to test
Attributes
- Returns
Some(pf(x))ifpf isDefinedAt x,Noneotherwise.- Source
- PartialFunction.scala
The partial function with empty domain.
The partial function with empty domain. Any attempt to invoke empty partial function leads to throwingscala.MatchError exception.
Attributes
- Source
- PartialFunction.scala
Converts an ordinary function to a partial function.
Converts an ordinary function to a partial function. Note that callingisDefinedAt(x) on this partial function will returntrue for everyx.
Value parameters
- f
an ordinary function
Attributes
- Returns
a partial function which delegates to the ordinary function
f- Source
- PartialFunction.scala