Correct Hash types documentation, document Routine types

doc/Language/js-nutshell.pod6

@@ -683,6 +683,11 @@ let todo: Map<string, boolean> = new Map([
     ['walk the dog', true],
     ['wash the dishes', true]
 ]);
+
+let doJob: (job: string) => boolean = function (job: string): boolean {
+    todo.set(job, true);
+    return true;
+};
 =end code
 
 In Perl 6, variables can be typed by placing the type between the declarator
@@ -698,13 +703,19 @@ $name = Phoebe; # Throws a compile-time error
 # The type here defines the type of the elements of the array.
 my Str @hobbies = ['origami', 'playing instruments', 'programming'];
 
-# The type here defines the type of the keys of the hash.
-# The type in the curly braces defines the type of the values of the hash.
-my Str %todo{Bool} = (
+# The type between the declarator and variable defines the type of the values
+# of the hash.
+# The type in the curly braces defines the type of the keys of the hash.
+my Bool %todo{Str} = (
     'clean the bathroom' => False,
     'walk the dog'       => True,
     'wash the dishes'    => True
 );
+
+# The type here defines the return value of the routine.
+my Bool &do-job = sub (Str $job --> Bool) {
+    %todo{$job} = True;
+};
 =end code
 
 =head3 Comparing JavaScript and Perl 6 types