exp/iterable: add UintArray

all other basic types seem to be represented.

R=rsc
CC=golang-dev
https://golang.org/cl/1919042

src/pkg/exp/iterable/array.go

@@ -57,3 +57,16 @@ func (a StringArray) Iter() <-chan interface{} {
 	}()
 	return ch
 }
+
+type UintArray []uint
+
+func (a UintArray) Iter() <-chan interface{} {
+	ch := make(chan interface{})
+	go func() {
+		for _, e := range a {
+			ch <- e
+		}
+		close(ch)
+	}()
+	return ch
+}

src/pkg/exp/iterable/iterable_test.go

@@ -15,6 +15,10 @@ func TestArrayTypes(t *testing.T) {
 	if x := Data(bytes)[1].(byte); x != 2 {
 		t.Error("Data(bytes)[1].(byte) = %v, want 2", x)
 	}
+	uints := UintArray([]uint{1, 2, 3})
+	if x := Data(uints)[1].(uint); x != 2 {
+		t.Error("Data(uints)[1].(uint) = %v, want 2", x)
+	}
 	ints := IntArray([]int{1, 2, 3})
 	if x := Data(ints)[2].(int); x != 3 {
 		t.Error("Data(ints)[2].(int) = %v, want 3", x)