From 17925568aee37a0431fa0dc2a910feb727d2c47b Mon Sep 17 00:00:00 2001
From: jkumorek01 <jkumorek01@gmail.com>
Date: Wed, 1 Jul 2026 15:01:26 +0200
Subject: [PATCH 1/3] First task solution

---
 src/formatDate.js | 40 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 39 insertions(+), 1 deletion(-)

diff --git a/src/formatDate.js b/src/formatDate.js
index 769e27661..8698a7c01 100644
--- a/src/formatDate.js
+++ b/src/formatDate.js
@@ -8,7 +8,45 @@
  * @returns {string}
  */
 function formatDate(date, fromFormat, toFormat) {
-  // write code here
+  const changeElement = toFormat[toFormat.length - 1];
+  const parts = date.split(baseElement);
+
+  const fromDay = fromFormat.indexOf('DD');
+  const fromMonth = fromFormat.indexOf('MM');
+
+  const fromYearIndex = fromFormat.includes('YYYY')
+    ? fromFormat.indexOf('YYYY')
+    : fromFormat.indexOf('YY');
+
+  const day = parts[fromDay];
+  const month = parts[fromMonth];
+  let year = parts[fromYearIndex];
+
+  if (fromFormat.includes('YYYY') && toFormat.includes('YY')) {
+    year = year.slice(2);
+  }
+
+  if (fromFormat.includes('YY') && toFormat.includes('YYYY')) {
+    year = Number(year) < 30 ? `20${year}` : `19${year}`;
+  }
+
+  const result = [];
+
+  for (const element of toFormat.slice(0, 3)) {
+    if (element === 'DD') {
+      result.push(day);
+    }
+
+    if (element === 'MM') {
+      result.push(month);
+    }
+
+    if (element === 'YY' || element === 'YYYY') {
+      result.push(year);
+    }
+  }
+
+  return result.join(changeElement);
 }
 
 module.exports = formatDate;

From 08adfb54f3f955d76312d96a8e09b862ea904ad8 Mon Sep 17 00:00:00 2001
From: jkumorek01 <jkumorek01@gmail.com>
Date: Wed, 1 Jul 2026 15:05:58 +0200
Subject: [PATCH 2/3] Second task solution

---
 src/formatDate.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/formatDate.js b/src/formatDate.js
index 8698a7c01..157766d2b 100644
--- a/src/formatDate.js
+++ b/src/formatDate.js
@@ -8,6 +8,7 @@
  * @returns {string}
  */
 function formatDate(date, fromFormat, toFormat) {
+  const baseElement = fromFormat[toFormat.length - 1];
   const changeElement = toFormat[toFormat.length - 1];
   const parts = date.split(baseElement);
 

From fd3d6626a3fa8ae71714af7e14c019131efd9025 Mon Sep 17 00:00:00 2001
From: jkumorek01 <jkumorek01@gmail.com>
Date: Wed, 1 Jul 2026 15:54:35 +0200
Subject: [PATCH 3/3] Third task solution

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

diff --git a/src/formatDate.js b/src/formatDate.js
index 157766d2b..9d8a629b4 100644
--- a/src/formatDate.js
+++ b/src/formatDate.js
@@ -8,9 +8,9 @@
  * @returns {string}
  */
 function formatDate(date, fromFormat, toFormat) {
-  const baseElement = fromFormat[toFormat.length - 1];
-  const changeElement = toFormat[toFormat.length - 1];
-  const parts = date.split(baseElement);
+  const inputSeparator = fromFormat[fromFormat.length - 1];
+  const outputSeparator = toFormat[toFormat.length - 1];
+  const parts = date.split(inputSeparator);
 
   const fromDay = fromFormat.indexOf('DD');
   const fromMonth = fromFormat.indexOf('MM');
@@ -47,7 +47,7 @@ function formatDate(date, fromFormat, toFormat) {
     }
   }
 
-  return result.join(changeElement);
+  return result.join(outputSeparator);
 }
 
 module.exports = formatDate;