[Sync Solution] javascript/lucky-numbers

solutions/javascript/lucky-numbers/1/lucky-numbers.js

@@ -0,0 +1,55 @@
+// @ts-check
+
+/**
+ * Calculates the sum of the two input arrays.
+ *
+ * @param {number[]} array1
+ * @param {number[]} array2
+ * @returns {number} sum of the two arrays
+ */
+export function twoSum(array1, array2) {
+     const num1 = Number(array1.join(''));
+    const num2 = Number(array2.join(''));
+
+  return num1 + num2;
+
+}
+
+/**
+ * Checks whether a number is a palindrome.
+ *
+ * @param {number} value
+ * @returns {boolean} whether the number is a palindrome or not
+ */
+export function luckyNumber(value) {
+
+  const str = String(value);
+  const reversed = str.split('').reverse().join('');
+
+  return str === reversed;
+
+}
+
+/**
+ * Determines the error message that should be shown to the user
+ * for the given input value.
+ *
+ * @param {string|null|undefined} input
+ * @returns {string} error message
+ */
+export function errorMessage(input) {
+  if (!input){
+    return "Required field";
+  }
+
+  const num = Number(input);
+
+  if(!num ){
+    return "Must be a number besides 0";
+  }
+  const str = String(num);
+  const reversed = str.split('').reverse().join('');
+
+  return "";
+
+}