How to sort all the data by date in google apps script? - date

Question

I have retrieved the data from REST API and inserted into google apps script but i am not sure how to sort the data based on the subscription date. I have used the sort() but it is only sorting one column instead of everything. This is my current code and screenshot so far:
function myFunction() {
var ss = SpreadsheetApp.getActiveSpreadsheet();
var mainSheet = ss.getSheetByName("test")
var apiKey = 'test';
var URL_STRING = "";
var url = URL_STRING + "?ApiKey=" + apiKey;
var response = UrlFetchApp.fetch(url);
var json = response.getContentText();
var data = JSON.parse(json);
var firstname = [];
var lastname = [];
var subscriptionDate = [];
for (var i=0;i<data.output.o1.length;i++){
fn=(data.output.o1[i].first_name);
firstname.push([fn]);
ln=(data.output.o1[i].last_name);
lastname.push([ln]);
sd=(data.output.o1[i].subscription_date);
subscriptionDate.push([sd]);
};
mainSheet.getRange(2, 1, firstname.length).setValues(firstname);
mainSheet.getRange(2, 2, lastname.length).setValues(lastname);
mainSheet.getRange(2, 3, subscriptionDate.length).setValues(subscriptionDate);
}

Answer 1

In this case, how about sorting the values when the array for putting to Spreadsheet is created? When this is reflected to your script, it becomes as follows.
From:
var firstname = [];
var lastname = [];
var subscriptionDate = [];
for (var i=0;i<data.output.o1.length;i++){
fn=(data.output.o1[i].first_name);
firstname.push([fn]);
ln=(data.output.o1[i].last_name);
lastname.push([ln]);
sd=(data.output.o1[i].subscription_date);
subscriptionDate.push([sd]);
};
mainSheet.getRange(2, 1, firstname.length).setValues(firstname);
mainSheet.getRange(2, 2, lastname.length).setValues(lastname);
mainSheet.getRange(2, 3, subscriptionDate.length).setValues(subscriptionDate);
To:
var values = data.output.o1.map(({first_name, last_name, subscription_date}) => [first_name, last_name, subscription_date]);
values.sort((a, b) => new Date(a[2]).getTime() > new Date(b[2]).getTime() ? 1 : -1);
mainSheet.getRange(2, 1, values.length, values[0].length).setValues(values);
When values.sort((a, b) => new Date(a[2]).getTime() > new Date(b[2]).getTime() ? 1 : -1); is modified to values.sort((a, b) => new Date(a[2]).getTime() > new Date(b[2]).getTime() ? -1 : 1);, the order of sort direction is changed.
Note:
As other method, when the following script to the bottom of your current script, the sort is run with the column "C".
mainSheet.getRange("A2:C").sort([{ column: 3, ascending: true }]);
In this answer, from your sample image, I supposed that your column "C" is the date object.
References:
map()
sort()
sort(sortSpecObj)

Answer 2

mainSheet.getRange(2,1,mainSheet.getLastRow()-1,3).sort({column:3,ascending:true});