Add <*> for IDictionary and IReadOnlyDictionary

Author: gusty

docsrc/content/abstraction-applicative.fsx

@@ -66,7 +66,7 @@ From F#
  -  ``Choice<'T,'U>``
  -  ``KeyValuePair<'Key,'T>``
  -  ``'Monoid * 'T``
- -  ``'ValueTuple<Monoid, 'T>``
+ -  ``ValueTuple<'Monoid, 'T>``
  -  ``Task<'T>``
  -  ``ValueTask<'T>``
  -  ``'R->'T``
@@ -107,6 +107,13 @@ Restricted:
  -  ``Set<'T>``
  -  ``IEnumerator<'T>``
 
+Only for <*> operation:
+ -  ``Map<'Key, 'T>``
+ -  ``Dictionary<'Key, 'T>``
+ -  ``IDictionary<'Key, 'T>``
+ -  ``IReadOnlyDictionary<'Key, 'T>``
+
+
  [Suggest another](https://github.com/fsprojects/FSharpPlus/issues/new) concrete implementation
 
 Examples

src/FSharpPlus/Control/Applicative.fs

@@ -54,6 +54,23 @@ type Apply =
            | true, vx -> dct.Add (k, vf vx)
            | _        -> ()
        dct
+
+    static member        ``<*>`` (f: IDictionary<'Key,_>, x: IDictionary<'Key,'T> , [<Optional>]_output: IDictionary<'Key,'U>  , [<Optional>]_mthd: Apply) : IDictionary<'Key,'U> =
+       let dct = Dictionary ()
+       for KeyValue(k, vf) in f do
+           match x.TryGetValue k with
+           | true, vx -> dct.Add (k, vf vx)
+           | _        -> ()
+       dct :> IDictionary<'Key,'U>
+
+    static member        ``<*>`` (f: IReadOnlyDictionary<'Key,_>, x: IReadOnlyDictionary<'Key,'T> , [<Optional>]_output: IReadOnlyDictionary<'Key,'U>  , [<Optional>]_mthd: Apply) : IReadOnlyDictionary<'Key,'U> =
+       let dct = Dictionary ()
+       for KeyValue(k, vf) in f do
+           match x.TryGetValue k with
+           | true, vx -> dct.Add (k, vf vx)
+           | _        -> ()
+       dct :> IReadOnlyDictionary<'Key,'U>
+
     #if !FABLE_COMPILER
     static member        ``<*>`` (f: Expr<'T->'U>, x: Expr<'T>, [<Optional>]_output: Expr<'U>, [<Optional>]_mthd: Apply) = Expr.Cast<'U> (Expr.Application (f, x))
     #endif