feat(LeetCode): ✨ add largestNumber (lc. 0179)

Author: rain84

src/leetcode/dsa/arrays_and_strings/0179-largestNumber.test.ts

@@ -0,0 +1,21 @@
+import { largestNumber } from './0179-largestNumber'
+
+it.each(
+  //  prettier-ignore
+  [
+    [
+      [10,2],
+      "210"
+    ],
+    [
+      [3,30,34,5,9],
+      "9534330"
+    ],
+    [
+      [111311, 1113],
+      "1113111311"
+    ]
+  ]
+)('should work %#', (input, output) => {
+  expect(largestNumber(input)).toBe(output)
+})

src/leetcode/dsa/arrays_and_strings/0179-largestNumber.ts

@@ -0,0 +1,13 @@
+/**
+ * {@link https://leetcode.com/problems/largest-number/ | 179. Largest Number}
+ *
+ * Topics: Array | String | Greedy | Sorting
+ */
+export function largestNumber(nums: number[]): string {
+  nums.sort((a, b) => {
+    const [ab, ba] = [String(a) + String(b), String(b) + String(a)]
+    return +ba - +ab
+  })
+
+  return nums[0] ? nums.join('') : '0'
+}