如何从最后一个数组元素中删除字符

Question

我需要删除Javascript数组中的最后一个元素逗号

var arr =  ["AAA,","BBB,"];

我需要以下结果

var arr =  ["AAA,","BBB"];

感谢任何帮助...

Answer 1

var arr =  ["AAA,","BBB,"];

arr[arr.length - 1] = arr[arr.length - 1].replace(',', '');

console.log(arr);

Answer 2

只需与replace()一起使用

var arr =  ["AAA,","BBB,"];

arr[arr.length-1] = arr[arr.length-1].replace(/\,/g,"");

console.log(arr)

Answer 3

arr[arr.length-1] = arr[arr.length-1].slice(0,-1)

Answer 4

另一种方式是：

＆＃13;

＆＃13;

var arr =  ["AAA,",",BBB,"];
arr.push(arr.pop().replace(/,$/, ''));
console.log(arr);

＆＃13;

＆＃13;

＆＃13;

Answer 5

This回答说明如何使用正则表达式执行此操作：

>> var str = "BBB,"
>> str = str.replace(/,[^,]*$/ , "")
>> str
>> "BBB"

Answer 6

var arr =  ["AAA,","BBB,"];
var lastelmnt = arr[(arr.length)-1].replace(',', '');
arr.splice(((arr.length)-1),1,lastelmnt);

输出：

["AAA,", "BBB"]

Answer 7

使用JavaScript字符串split()方法＆amp;数组splice()方法。

<强>样本

var arr =  ["AAA,","BBB,"];

var arrLastElement = arr[arr.length-1];

var splitStr =  arrLastElement.split(',');

var strWithoutComma = splitStr[0];

arr.splice(arr.length-1);
arr.push(strWithoutComma);

console.log(arr);