Data update

Task/Palindromic-gapful-numbers/JavaScript/palindromic-gapful-numbers.js

@@ -0,0 +1,22 @@
+function is_palindrome(n) {
+  return n == Number([...String(n)].toReversed().join(""));
+}
+
+function is_gapful(n) {
+  const digits = [...String(n)].map(Number);
+  const div = 10 * digits.shift() + digits.pop();
+  return Number.isInteger(n / div);
+}
+
+for (let d = 2; d <= 9; d++) {
+  console.log(`|Palindromic gapful numbers ending in ${d}|`);
+  let nums = [], n = 100 + d;
+  while (nums.length < 100) {
+    if (is_gapful(n) && is_palindrome(n)) {
+      nums.push(n);
+    }
+    n += 10;
+  }
+  console.log(`First 20: ${nums.slice(0, 20).join(" ")}`);
+  console.log(`86th-100th: ${nums.slice(85, 100).join(" ")}`);
+}