From 72612ee900f9949d4d6cb05ff8df3ff79b512cb8 Mon Sep 17 00:00:00 2001
From: Oleksii Trekhleb <trehleb@gmail.com>
Date: Wed, 29 Jan 2020 06:49:43 +0100
Subject: [PATCH] Add more principles.

---
 README.md | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/README.md b/README.md
index ecc073b..36cd902 100644
--- a/README.md
+++ b/README.md
@@ -200,6 +200,31 @@ function sum(a, b) {
 }
 ```
 
+### 💩 Don't specify types and/or don't do type checks if language allows you to do so.
+
+_Good 👍🏻_
+
+```javascript
+function sum(a, b) {
+  return a + b;
+}
+
+// Having untyped fun here.
+const guessWhat = sum([], {}); // -> "[object Object]"
+const guessWhatAgain = sum({}, []); // -> 0
+```
+
+_Bad 👎🏻_
+
+```javascript
+function sum(a: number, b: number): number {
+  return a + b;
+}
+
+// This one fails during the transpilation/compilation.
+const guessWhat = sum([], {});
+```
+
 ### 💩 You need to have an unreachable piece of code
 
 This is your "Plan B".