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@ -57,7 +57,9 @@ comments: true
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=== "TypeScript"
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```typescript title="array.ts"
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/* 初始化数组 */
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let arr: number[] = new Array(5).fill(0)
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let nums: number[] = [1, 3, 2, 5, 4]
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```
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=== "C"
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@ -148,7 +150,14 @@ elementAddr = firtstElementAddr + elementLength * elementIndex
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=== "TypeScript"
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```typescript title="array.ts"
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/* 随机返回一个数组元素 */
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function randomAccess(nums: number[]): number {
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// 在区间 [0, nums.length) 中随机抽取一个数字
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const random_index = Math.floor(Math.random() * nums.length)
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// 获取并返回随机元素
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const random_num = nums[random_index]
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return random_num
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}
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```
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=== "C"
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@ -240,7 +249,17 @@ elementAddr = firtstElementAddr + elementLength * elementIndex
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=== "TypeScript"
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```typescript title="array.ts"
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/* 扩展数组长度 */
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function extend(nums: number[], enlarge: number): number[] {
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// 初始化一个扩展长度后的数组
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const res = new Array(nums.length + enlarge).fill(0)
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// 将原数组中的所有元素复制到新数组
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for (let i = 0; i < nums.length; i++){
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res[i] = nums[i]
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}
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// 返回扩展后的新数组
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return res
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}
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```
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=== "C"
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@ -358,7 +377,23 @@ elementAddr = firtstElementAddr + elementLength * elementIndex
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=== "TypeScript"
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```typescript title="array.ts"
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/* 在数组的索引 index 处插入元素 num */
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function insert(nums: number[], num: number, index: number): void {
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// 把索引 index 以及之后的所有元素向后移动一位
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for (let i = nums.length - 1; i >= index; i--) {
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nums[i] = nums[i - 1]
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}
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// 将 num 赋给 index 处元素
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nums[index] = num
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}
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/* 删除索引 index 处元素 */
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function remove(nums: number[], index: number): void {
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// 把索引 index 之后的所有元素向前移动一位
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for (let i = index; i < nums.length - 1; i++) {
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nums[i] = nums[i + 1]
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}
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}
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```
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=== "C"
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@ -447,7 +482,18 @@ elementAddr = firtstElementAddr + elementLength * elementIndex
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=== "TypeScript"
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```typescript title="array.ts"
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/* 遍历数组 */
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function traverse(nums: number[]): void {
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let count = 0
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// 通过索引遍历数组
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for (let i = 0; i < nums.length; i++) {
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count++
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}
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// 直接遍历数组
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for(let num of nums){
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count += 1
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}
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}
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```
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=== "C"
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@ -523,7 +569,15 @@ elementAddr = firtstElementAddr + elementLength * elementIndex
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=== "TypeScript"
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```typescript title="array.ts"
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/* 在数组中查找指定元素 */
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function find(nums: number[], target: number): number {
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for (let i = 0; i < nums.length; i++) {
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if (nums[i] === target) {
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return i
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}
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}
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return -1
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}
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```
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=== "C"
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