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0

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Sort Data and Time String in Javascript

I Know there are lot of answers out there to sort date and time. But in every answer, they sort only date or they sort only time. I can't find the answer which sorts both date and time string.

Here's the Code I tried:

var x = [ '29/09/2020 11:55:56', '04/08/2021 11:57:06', '30/09/2019 15:19:49', '04/08/2021 13:57:06' ]
x.sort((a, b) => new Date(b).getTime() - new Date(a).getTime()).reverse();
console.log(x)

Output I got:

["04/08/2021 13:57:06", "30/09/2019 15:19:49", "04/08/2021 11:57:06", "29/09/2020 11:55:56"]

Required Output:

["04/08/2021 13:57:06","04/08/2021 11:57:06", "29/09/2020 11:55:56", "30/09/2019 15:19:49", ]

I searched whole day. Please Help me with some solutions to fix this.

almost 3 years ago · Juan Pablo Isaza
3 answers
Answer question

0

The problem is that Date uses a yyyy/mm/dd format instead of a dd/mm/yyyy format. So all your Date objects are Invalid Date.

P.S. If you sort but have to reverse the order afterwards, just reverse the subtractions.

almost 3 years ago · Juan Pablo Isaza Report

0

Date and time are not separate in the context of a javascript Date object, internally they are just stored as millisecond offsets. But, you can't rely on Date parsing strings for you. Write a custom parser for you specific date-time strings and then then simply subtract dates.

There's no need for reverse() either, simply switch the subtraction to change direction.

const x = [ '29/09/2020 11:55:56', '04/08/2021 11:57:06', '30/09/2019 15:19:49', '04/08/2021 13:57:06' ];

const parse_date_string = (str) => {
  const [date, time]= str.split(' ');
  const [day, month, year] = date.split('/');
  const [hr, min, sec] = time.split(':');
   
  return [year, (month - 1), day, hr, min, sec].map(Number);
}

x.sort((a, b) => new Date(...parse_date_string(b)) - new Date(...parse_date_string(a)));


console.log(x)

almost 3 years ago · Juan Pablo Isaza Report

0

if momentjs an option:

var x = [ '29/09/2020 11:55:56', '04/08/2021 11:57:06', '30/09/2019 15:19:49', '04/08/2021 13:57:06' ];
x.sort((a, b) => moment(b,"DD-MM-YYYY hh:mm:ss") - (moment(a,"DD-MM-YYYY hh:mm:ss")));
console.log(x)
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.29.1/moment.min.js"></script>

almost 3 years ago · Juan Pablo Isaza Report
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