From dfd3c91f150a62f0de7809b41d5d117043d8f66a Mon Sep 17 00:00:00 2001
From: Szymon Pachucki <szymonpachucki010@gmail.com>
Date: Tue, 25 Jul 2023 15:14:13 +0200
Subject: [PATCH 1/2] Solution

---
 src/transformState.js | 31 ++++++++++++++++++++++++++++++-
 1 file changed, 30 insertions(+), 1 deletion(-)

diff --git a/src/transformState.js b/src/transformState.js
index a1eaa0640..be8ddd5b0 100644
--- a/src/transformState.js
+++ b/src/transformState.js
@@ -5,7 +5,36 @@
  * @param {Object[]} actions
  */
 function transformState(state, actions) {
-  // write code here
+  for (const currentAction of actions) {
+    switch (currentAction.type) {
+      case 'addProperties':
+        const extraData = currentAction.extraData;
+
+        for (const key in extraData) {
+          state[key] = extraData[key];
+        }
+        break;
+
+      case 'removeProperties':
+        const keysToRemove = currentAction.keysToRemove;
+
+        for (const key of keysToRemove) {
+          if (state.hasOwnProperty(key)) {
+            delete state[key];
+          }
+        }
+        break;
+
+      case 'clear':
+        for (const key in state) {
+          delete state[key];
+        }
+        break;
+
+      default:
+        break;
+    }
+  }
 }
 
 module.exports = transformState;

From dbe0ae0f6374677f1b3bcf82af5bcb3fc5af30c1 Mon Sep 17 00:00:00 2001
From: Szymon Pachucki <szymonpachucki010@gmail.com>
Date: Thu, 27 Jul 2023 11:31:04 +0200
Subject: [PATCH 2/2] Solution

---
 src/transformState.js | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/transformState.js b/src/transformState.js
index be8ddd5b0..6dfccfd6b 100644
--- a/src/transformState.js
+++ b/src/transformState.js
@@ -10,15 +10,15 @@ function transformState(state, actions) {
       case 'addProperties':
         const extraData = currentAction.extraData;
 
-        for (const key in extraData) {
-          state[key] = extraData[key];
-        }
+        Object.assign(state, extraData);
+
         break;
 
       case 'removeProperties':
         const keysToRemove = currentAction.keysToRemove;
 
         for (const key of keysToRemove) {
+          // is it not easier this way, than with object destructuring?
           if (state.hasOwnProperty(key)) {
             delete state[key];
           }
@@ -32,7 +32,7 @@ function transformState(state, actions) {
         break;
 
       default:
-        break;
+        throw new Error('incorrect type');
     }
   }
 }