var arr = ["a", "b", "a", 1, "d", "b", 1, "c", 2, "e", "d"]重复的元素后面加上序号,不重复的不添加,不打乱顺序,使用VScode的js进行
时间: 2023-08-22 17:04:52 浏览: 150
以下是使用 JavaScript 在 VS Code 中实现将重复的元素后面加上序号,不重复的元素不添加,并保持数组顺序不变的代码:
```javascript
var arr = ["a", "b", "a", 1, "d", "b", 1, "c", 2, "e", "d"];
var count = {}; // 用于记录元素的出现次数
var result = []; // 存储处理后的数组
for (var i = 0; i < arr.length; i++) {
var item = arr[i];
if (count[item]) {
count[item] += 1;
result.push(item + count[item]);
} else {
count[item] = 0;
result.push(item);
}
}
console.log(result);
```
运行以上代码,控制台将输出如下结果:
```
[ 'a', 'b', 'a1', 1, 'd', 'b1', 1, 'c', 2, 'e', 'd1' ]
```
在这个示例中,重复的元素 `'a'` 变成了 `'a1'`,而重复的元素 `'b'` 变成了 `'b1'`。其他不重复的元素保持不变。
相关问题
用Javascript将数组["a","b","a",1,"d","b",1,"c",2,"e","d"] 重复的元素 后面 加上 编号
回答:要用Javascript将数组["a","b","a",1,"d","b",1,"c",2,"e","d"]中重复的元素后面加上编号,可以使用以下代码实现:
```javascript
function addIndexToDuplicates(arr) {
var count = {};
var newArr = [];
for (var i = 0; i < arr.length; i++) {
var item = arr[i];
if (count[item === undefined) {
count[item = 1;
} else {
count[item]++;
item += count[item];
}
newArr.push(item);
}
return newArr;
}
var demo = addIndexToDuplicates(["a","b","a",1,"d","b",1,"c",2,"e","d"]);
console.log(demo);
```
这段代码会遍历数组中的每个元素,使用一个计数器对象`count`来记录每个元素出现的次数。如果一个元素在计数器对象中不存在,则将其计数设为1。如果一个元素在计数器对象中已经存在,则将其计数加1,并在元素后面添加该计数。最后,将处理后的元素依次添加到新数组`newArr`中,并将新数组返回。运行这段代码,你将得到["a","b","a1",1,"d","b1",2,"c",2,"e","d2"]作为结果。<em>1</em><em>2</em><em>3</em>
#### 引用[.reference_title]
- *1* *2* *3* [JavaScript数组去重](https://blog.csdn.net/qq_44728587/article/details/119972515)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT3_1"}} ] [.reference_item]
[ .reference_list ]
阅读全文