Feat: Adds JS 036

FrankKair · Mar 1, 2019 · 663051c · 663051c
1 parent 5b43c14
commit 663051c
Showing 1 changed file with 25 additions and 0 deletions.
diff --git a/src/036/p036.js b/src/036/p036.js
@@ -0,0 +1,25 @@
+const palindrome = (s) => s === s.split('').reverse().join('');
+
+const numberPalindrome = (n, base) => {
+  switch (base) {
+    case 2: return palindrome(n.toString(2));
+    case 10: return palindrome(n.toString());
+    default: return false;
+  }
+}
+
+const doubleBasePalindrome = (n) => 
+  numberPalindrome(n, 2) && numberPalindrome(n, 10);
+
+const sumDoubleBasePalindromesBelow = (limit) => (
+  Array(limit)
+    .fill(0)
+    .map((_, i) => i + 1)
+    .filter(x => doubleBasePalindrome(x))
+    .reduce((sum, value) => sum + value)
+);
+
+const solve = () => sumDoubleBasePalindromesBelow(1000000);
+
+const result = solve();
+console.log(result);