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SI-5370 PartialFunction is a Function with queryable domain

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1 parent 4615ec5 commit aa641871a9807f6f80675cb4d65fb70534119268 @adriaanm adriaanm committed Mar 12, 2014
Showing with 2 additions and 5 deletions.
  1. +2 −5 14-the-scala-standard-library.md
@@ -378,11 +378,8 @@ trait Function$n$[-T_1, ..., -T_$n$, +R] {
}
```
-A subclass of `Function1` represents partial functions,
-which are undefined on some points in their domain. In addition to the
-`apply` method of functions, partial functions also have a
-`isDefined` method, which tells whether the function is defined
-at the given argument:
+The `PartialFunction` subclass of `Function1` represents functions that (indirectly) specify their domain.
+Use the `isDefined` method to query whether the partial function is defined for a given input (i.e., whether the input is part of the function's domain).
```
class PartialFunction[-A, +B] extends Function1[A, B] {

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