add solution

package.json

@@ -17,7 +17,7 @@
   "license": "GPL-3.0",
   "devDependencies": {
     "@mate-academy/eslint-config": "latest",
-    "@mate-academy/scripts": "^1.8.6",
+    "@mate-academy/scripts": "^1.9.12",
     "eslint": "^8.57.0",
     "eslint-plugin-jest": "^28.6.0",
     "eslint-plugin-node": "^11.1.0",

src/formatDate.js

@@ -8,7 +8,50 @@
  * @returns {string}
  */
 function formatDate(date, fromFormat, toFormat) {
-  // write code here
-}
+  const fromSpliter = fromFormat[fromFormat.length - 1];
+  const toSpliter = toFormat[toFormat.length - 1];
+  let longYear = 0;
+  let shortYear = 0;
+  let year = '';
+  let month = 0;
+  let day = 0;
+  const dateArray = [];
+
+  for (let i = 0; i < fromFormat.length - 1; i++) {
+    if (fromFormat[i] === 'YYYY') {
+      longYear = date.split(fromSpliter)[i];
+    } else if (fromFormat[i] === 'YY') {
+      shortYear = date.split(fromSpliter)[i];
+    } else if (fromFormat[i] === 'MM') {
+      month = date.split(fromSpliter)[i];
+    } else {
+      day = date.split(fromSpliter)[i];
+    }
+  }
 
+  for (let i = 0; i < toFormat.length - 1; i++) {
+    if (toFormat[i] === 'YYYY' && longYear !== 0) {
+      dateArray.push(longYear);
+    } else if (toFormat[i] === 'YY' && shortYear !== 0) {
+      dateArray.push(shortYear);
+    } else if (toFormat[i] === 'YY' && longYear !== 0) {
+      year += longYear;
+      year = year.split('').splice(2).join('');
+      dateArray.push(Number(year));
+    } else if (toFormat[i] === 'YYYY' && shortYear !== 0) {
+      if (shortYear < 30) {
+        year += '20' + shortYear;
+      } else {
+        year += '19' + shortYear;
+      }
+      dateArray.push(Number(year));
+    } else if (toFormat[i] === 'MM') {
+      dateArray.push(month);
+    } else {
+      dateArray.push(day);
+    }
+  }
+
+  return dateArray.join(toSpliter);
+}
 module.exports = formatDate;