調用某個數組的其餘部分

Question

如何在我的字符串末尾調用數組的其餘部分？我聽說過擴散算子（但我不太確定）。事實上，我從數組中得到的索引數目是不確定的（除了前兩個）。

let filePath = "folder/folder/potentialFolder/potentialFolder/.../file.txt"; 
let filePathBackup = filePath.split('/'); 
filePathBackup = `${filePathBackup[0]}/${filePathBackup[1]}/backup/${the_rest_of_my_array}`; 

謝謝你的幫忙！

Answer 1

嘗試使用.slice()和.join()這樣的：

let filePath = 'folder/folder/potentialFolder/potentialFolder/.../file.txt'; 
let filePathBackup = filePath.split('/'); 
let rest = filePathBackup.slice(2).join('/'); 
let result = ${filePathBackup[0]}/${filePathBackup[1]}/backup/${rest}`;