Javascript删除两个'/'之间的字符串答案

【问题标题】：Javascript remove string between two ' / 'Javascript删除两个'/'之间的字符串
【发布时间】：2020-01-09 02:18:26
【问题描述】：

我正在寻求一些帮助，我是新学习 Javascript，我想删除路径中的最后一个文件夹名称。

示例：/FOLDER1/FOLDER2/FOLDER3/ 是我当前的路径，我想得到类似/FOLDER1/FOLDER2/ 的结果

非常感谢。

【问题讨论】：

标签： javascript string split substring splice

【解决方案1】：

var path =  '/FOLDER1/FOLDER2/FOLDER3/';
var splitPath = path.split('/');//[0] = '', [1] = FOLDER1, [2] = FOLDER2, [3] = FOLDER3
var finalPath = "/" + splitPath[1]+  "/"+ splitPath[2] + "/";

【讨论】：

【解决方案2】：

试试这个


var path =  '/FOLDER1/FOLDER2/FOLDER3/';

var splitPath = path.split('/');    // ["", "FOLDER1", "FOLDER2", "FOLDER3", ""]

splitPath.shift();    // ["FOLDER1", "FOLDER2", "FOLDER3", ""]
splitPath.pop();    // ["FOLDER1", "FOLDER2", "FOLDER3"]
splitPath.pop();    // ["FOLDER1", "FOLDER2"]

var result = "/" + splitPath.join("/") + "/";    // "/FOLDER1/FOLDER2/"

console.log(result);

【讨论】：

【解决方案3】：

这是另一种方式：

'/FOLDER1/FOLDER2/FOLDER3/'.replace(/(\w*\/)$/, '');
//gives you: "/FOLDER1/FOLDER2/"

还有一个：

var s = "FOLDER1/FOLDER2/FOLDER3/";

var ss = s.replace(/\/$/, '');
ss.substring(0, ss.lastIndexOf('/'));

另一个：

const [path1, path2] = "FOLDER1/FOLDER2/FOLDER3/".split("/")
console.log('path: ', `/${path1}/${path2}/`);

另一个：

var s = "FOLDER1/FOLDER2/FOLDER3/";

const [newPath] = s.split(/(\w+\/)$/)
//"FOLDER1/FOLDER2/"

【讨论】：

【解决方案4】：

let path = "/FOLDER1/FOLDER2/FOLDER3/"

let result = path.split("/").filter((el,idx, arr) => idx < arr.length - 2).join("/") + "/"

console.log(result)

【讨论】：