识别数组的最后一个元素-JavaScript

Question

I have a file path for example: new/lib/java.exe I would like to get rid of the root folder new and restructure the new path as lib/java.exe

Problem : I am ending up getting the path as lib/java.exe/ instead. I don't want to have "/" in the end. Please have a look at the code that I tried. Please help me resolve this problem.

function myFunction() {
    var path=''; 
    var str = "new/lib/java.exe";
    var res = str.split("/");
    if(res.length>0)     //getting rid of the 1st element "new"
       res.shift();

   for(var i=0;i<res.length;i++){
      if(res.length ==1){
        path = res[i];
      }
      else{
        path += res[i] + "/"; //***May be this is the problem***
      }
    }
   document.getElementById("demo").innerHTML = path;
}

Answer 1

An Array#join() will do.

function myFunction() {
    var path = '';
    var str = "new/lib/java.exe";
    var res = str.split("/");
    if (res.length > 0)     //getting rid of the 1st element "new"
        res.shift();
    }
    document.getElementById("demo").innerHTML = res.join('/');
}

Answer 2

You can create an array, and shift the value.

var str = "new/lib/java.exe";
var arr = str.split('/');

arr.shift();
var joined = arr.join('/');