https://leetcode.cn/problems/thousand-separator/

Author: masx200

README.md

@@ -10,6 +10,8 @@ leetcode 测试
 
 ##### 包含的内容如下
 
+https://leetcode.cn/problems/thousand-separator/
+
 https://leetcode.cn/problems/count-odd-numbers-in-an-interval-range/
 
 https://leetcode.cn/problems/shuffle-string/

thousand-separator/index.ts

@@ -0,0 +1,6 @@
+export default function thousandSeparator(n: number): string {
+    const str = [...n.toString()].reverse();
+    return Array(Math.ceil(str.length / 3)).fill(0).map((_, i) =>
+        str.slice(i * 3, i * 3 + 3).reverse().join("")
+    ).reverse().join(".");
+}