From 3503ed96667ebeaf54298cad6ccd226b7c2e67d3 Mon Sep 17 00:00:00 2001
From: unional <homawong@gmail.com>
Date: Sun, 24 Sep 2023 20:59:27 -0700
Subject: [PATCH] docs: update undefined docs

---
 type-plus/ts/undefined/is_not_undefined.ts | 3 +++
 type-plus/ts/undefined/is_undefined.ts     | 5 +----
 type-plus/ts/undefined/readme.md           | 8 ++++----
 3 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/type-plus/ts/undefined/is_not_undefined.ts b/type-plus/ts/undefined/is_not_undefined.ts
index 36495e44e0..a6452e5a5f 100644
--- a/type-plus/ts/undefined/is_not_undefined.ts
+++ b/type-plus/ts/undefined/is_not_undefined.ts
@@ -33,6 +33,9 @@ import type { SelectInvertWithDistribute } from '../type_plus/branch/select_inve
  * @example
  * ```ts
  * type R = IsNotUndefined<undefined, { selection: 'filter-unknown' }> // unknown
+ *
+ * type R = IsNotUndefined<string | boolean, { selection: 'filter-unknown' }> // string | boolean
+ * type R = IsNotUndefined<string | undefined, { selection: 'filter-unknown' }> // unknown
  * ```
  *
  * 🔢 *customize*
diff --git a/type-plus/ts/undefined/is_undefined.ts b/type-plus/ts/undefined/is_undefined.ts
index 053667f724..4d0b6cb926 100644
--- a/type-plus/ts/undefined/is_undefined.ts
+++ b/type-plus/ts/undefined/is_undefined.ts
@@ -37,11 +37,8 @@ import type { SelectWithDistribute } from '../type_plus/branch/select_with_distr
  *
  * @example
  * ```ts
- * type R = IsUndefined<undefined, { selection: 'filter-unknown' }> // undefined
- *
- * type R = IsUndefined<never, { selection: 'filter-unknown' }> // unknown
- * type R = IsUndefined<unknown, { selection: 'filter-unknown' }> // unknown
  * type R = IsUndefined<string | boolean, { selection: 'filter-unknown' }> // unknown
+ * type R = IsUndefined<string | undefined, { selection: 'filter-unknown' }> // unknown
  * ```
  *
  * 🔢 *customize*:
diff --git a/type-plus/ts/undefined/readme.md b/type-plus/ts/undefined/readme.md
index 435347b173..0e744f5d8d 100644
--- a/type-plus/ts/undefined/readme.md
+++ b/type-plus/ts/undefined/readme.md
@@ -39,11 +39,8 @@ type R = IsUndefined<string | undefined> // undefined
 Filter to ensure `T` is `undefined`, otherwise returns `unknown`.
 
 ```ts
-type R = IsUndefined<undefined, { selection: 'filter-unknown' }> // undefined
-
-type R = IsUndefined<never, { selection: 'filter-unknown' }> // unknown
-type R = IsUndefined<unknown, { selection: 'filter-unknown' }> // unknown
 type R = IsUndefined<string | boolean, { selection: 'filter-unknown' }> // unknown
+type R = IsUndefined<string | undefined, { selection: 'filter-unknown' }> // unknown
 ```
 
 🔢 *customize*:
@@ -98,6 +95,9 @@ Filter to ensure `T` is not `undefined`, otherwise returns `unknown`.
 
 ```ts
 type R = IsNotUndefined<undefined, { selection: 'filter-unknown' }> // unknown
+
+type R = IsNotUndefined<string | boolean, { selection: 'filter-unknown' }> // string | boolean
+type R = IsNotUndefined<string | undefined, { selection: 'filter-unknown' }> // unknown
 ```
 
 🔢 *customize*