Add ToIntSlice

cast.go

@@ -56,3 +56,8 @@ func ToStringSlice(i interface{}) []string {
 	v, _ := ToStringSliceE(i)
 	return v
 }
+
+func ToIntSlice(i interface{}) []int {
+	v, _ := ToIntSliceE(i)
+	return v
+}

cast_test.go

@@ -77,6 +77,13 @@ func TestMaps(t *testing.T) {
 	assert.Equal(t, ToStringMapBool(stringMapBool), map[string]bool{"v1": true, "v2": false})
 }
 
+func TestSlices(t *testing.T) {
+	assert.Equal(t, []string{"a", "b"}, ToStringSlice([]string{"a", "b"}))
+	assert.Equal(t, []string{"1", "3"}, ToStringSlice([]interface{}{1, 3}))
+	assert.Equal(t, []int{1, 3}, ToIntSlice([]int{1, 3}))
+	assert.Equal(t, []int{1, 3}, ToIntSlice([]interface{}{1.2, 3.2}))
+}
+
 func TestToBool(t *testing.T) {
 	assert.Equal(t, ToBool(0), false)
 	assert.Equal(t, ToBool(nil), false)

caste.go

@@ -299,6 +299,26 @@ func ToStringSliceE(i interface{}) ([]string, error) {
 	return a, fmt.Errorf("Unable to Cast %#v to []string", i)
 }
 
+func ToIntSliceE(i interface{}) ([]int, error) {
+	jww.DEBUG.Println("ToIntSliceE called on type:", reflect.TypeOf(i))
+
+	var a []int
+
+	switch v := i.(type) {
+	case []interface{}:
+		for _, u := range v {
+			a = append(a, ToInt(u))
+		}
+		return a, nil
+	case []int:
+		return v, nil
+	default:
+		return a, fmt.Errorf("Unable to Cast %#v to []int", i)
+	}
+
+	return a, fmt.Errorf("Unable to Cast %#v to []int", i)
+}
+
 func StringToDate(s string) (time.Time, error) {
 	return parseDateWith(s, []string{
 		time.RFC3339,