//=========================================
//特定のフォルダ下のフォルダ情報を2次元配列で返す関数
//==========================================
function getFolderArray(folderId){
//定数宣言
const rootFolder = DriveApp.getFolderById(folderId);
const folders = rootFolder.getFolders();
const folderArray=[];
while(folders.hasNext()){
const folder = folders.next();
//2次元配列
folderArray.push([Folder.getName(),Folder.getId()]);
}
return folderArray;
}