From 1d6912c5800327439e11bea3e548a4e2cfcbf750 Mon Sep 17 00:00:00 2001
From: Martin Blazik <martin.blazik@gooddata.com>
Date: Wed, 30 Sep 2020 08:23:05 +0200
Subject: [PATCH] Add Kotlin Coding Guideline

---
 doc/kotlin-coding-guideline.md | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 doc/kotlin-coding-guideline.md

diff --git a/doc/kotlin-coding-guideline.md b/doc/kotlin-coding-guideline.md
new file mode 100644
index 0000000..ec2f70c
--- /dev/null
+++ b/doc/kotlin-coding-guideline.md
@@ -0,0 +1,27 @@
+### `value.?let` or `if (value != null)`
+
+Is really better to use
+
+```kotlin
+value?.let {
+     // some block
+}
+```
+
+then
+
+```kotlin
+if (value != null) {
+    // some block
+}
+```
+
+There is no return value so block is NOT expression.
+
+### Don't use anonymous class implementation
+```kotlin
+val value = object : Type {
+    // implementation
+}
+```
+