code(ts): worst best time complexity

codes/typescript/chapter_computational_complexity/worst_best_time_complexity.ts

@@ -5,7 +5,7 @@
  */
 
 function randomNumbers(n: number): number[] {
-    nums = Array(n);
+    let nums = Array(n);
     for (let i = 0; i < n; i++) {
         nums[i] = i + 1;
     }
@@ -19,7 +19,7 @@ function randomNumbers(n: number): number[] {
     return nums;
 }
 
-function findOne(nums) {
+function findOne(nums: number[]): number {
     for (let i = 0; i < nums.length; i++) {
         if (nums[i] == 1) {
             return i;
@@ -28,7 +28,7 @@ function findOne(nums) {
     return -1;
 }
 
-function main() {
+function main(): void {
     for (let i = 0; i < 10; i++) {
         let n = 100;
         let nums = randomNumbers(n);

docs/chapter_computational_complexity/time_complexity.md

@@ -2329,7 +2329,7 @@ $$
 
     ```js title="worst_best_time_complexity.js"
     function randomNumbers(n) {
-        nums = Array(n);
+        let nums = Array(n);
         for (let i = 0; i < n; i++) {
             nums[i] = i + 1;
         }
@@ -2368,7 +2368,41 @@ $$
 === "TypeScript"
 
     ```typescript title="worst_best_time_complexity.ts"
+    function randomNumbers(n: number): number[] {
+        let nums = Array(n);
+        for (let i = 0; i < n; i++) {
+            nums[i] = i + 1;
+        }
+        // 随机打乱数组元素
+        for (let i = 0; i < n; i++) {
+            let r = Math.floor(Math.random() * n);
+            let temp = nums[i];
+            nums[i] = nums[r];
+            nums[r] = temp;
+        }
+        return nums;
+    }
+
+    function findOne(nums: number[]): number {
+        for (let i = 0; i < nums.length; i++) {
+            if (nums[i] == 1) {
+                return i;
+            }
+        }
+        return -1;
+    }
 
+    function main(): void {
+        for (let i = 0; i < 10; i++) {
+            let n = 100;
+            let nums = randomNumbers(n);
+            let index = findOne(nums);
+            console.log(
+                "\n数组 [ 1, 2, ..., n ] 被打乱后 = [" + nums.join(", ") + "]"
+            );
+            console.log("数字 1 的索引为 " + index);
+        }
+    }
     ```
 
 === "C"