google-apps-script - Google Apps Script : In spreadsheet, 如何选择包含日期格式值的单元格并将其更改为该日期加 7 天(1 周)

Question

我有一个 google 电子表格，想使用 Google Apps 脚本激活第一个工作表中的单元格 B1(当前格式为日期 - 1/27/2014)并将其更改为该日期加 7 天(2/3/2014)。我对 Google Apps Script 很陌生，只成功编写了几个其他函数。到目前为止我的想法是:

function changeDate() {

    var ss = SpreadsheetApp.getActiveSpreadsheet();
    var sheet = ss.getSheets()[0];

    var b1_date = sheet.getRange("B1").getValue();
    //...

}

Answer 1

function changeDate()
{
  var ss = SpreadsheetApp.getActiveSpreadsheet();
  var sheet = ss.getSheets()[0];
  var cell = sheet.getRange("B1");
  var oldDate = cell.getValue().getTime(); //milliseconds from 1/1/1970
  var newDate = new Date();
  newDate.setTime(oldDate + (7*24*60*60*1000)); //add milliseconds in 7 days
  cell.setValue(newDate);  
}

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/getTime
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/setTime