How to sort a javascript array by date

Question

For example in my array i have this data

var mydate = [
"2016,10,01",
"2016,09,13", 
"2016,09,05",
"2016,09,09", 
"2016,10,02"];

How to sort this? I want this output:

There are a number of ways you could do this, super basic example: remove the commas, turn it into an int and use a generic int sort. — DBS
– DBS, Commented Oct 5, 2016 at 8:04
@mplungjan Fair enough, I didn't think about the string equivalents of numbers working correctly in "alphabetical" order, but that makes sense. — DBS
– DBS, Commented Oct 5, 2016 at 8:11
stackoverflow.com/questions/30691066/sort-a-string-date-array — Paul
– Paul, Commented Oct 5, 2016 at 8:11

Hassan · Accepted Answer · 2016-10-05 08:06:50Z

8

A simple mydate.sort() could do that.

answered Oct 5, 2016 at 8:06

Hassan

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11 Comments

Beginner Over a year ago

w0w nice function I didn't know it exist

Rajesh Dixit Over a year ago

Will .sort() not sort based on string values?

mplungjan Over a year ago

@Rajesh Yes and the string "2016,10,02" sorts higher than "2016,10,01" and will sort correctly. It will fail from year "10000,01,01"

Rajesh Dixit Over a year ago

@mplungjan it will also fail if OP adds time in string. Also I would not suggest sorting based on string values. Its not a reliable solution

Rajesh Dixit Over a year ago

@Tester your sort will fail for "2016, 2, 02" as well. Sample Fiddle

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Rajesh Dixit · Accepted Answer · 2016-10-05 08:07:04Z

2

You will have to parse date into date object and then sort using date.getTime()

var mydate = [
  "2016,10,01",
  "2016,09,13",
  "2016,09,05",
  "2016,09,09",
  "2016,10,02"
];

mydate.sort(function(a,b){
  var da = new Date(a).getTime();
  var db = new Date(b).getTime();
  
  return da < db ? -1 : da > db ? 1 : 0
});
console.log(mydate)

answered Oct 5, 2016 at 8:07

Rajesh Dixit

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Comments

Pranav C Balan · Accepted Answer · 2016-10-05 08:11:25Z

1

Use Array#sort method with Date constructor.

var mydate = [
  "2016,10,01",
  "2016,09,13",
  "2016,09,05",
  "2016,09,09",
  "2016,10,02"
];

mydate.sort(function(a, b) {
  return new Date(...a.split(',')) - new Date(...b.split(','));
});

console.log(mydate);

Spread syntax not supported by older browser in that case do it like.

var mydate = [
  "2016,10,01",
  "2016,09,13",
  "2016,09,05",
  "2016,09,09",
  "2016,10,02"
];

mydate.sort(function(a, b) {
  var a1 = a.split(','),
    b1 = b.split(',');
  return new Date(a1[0], a1[1], a1[2]) - new Date(b1[0], b1[1], b1[2]);
});

console.log(mydate);

edited Oct 5, 2016 at 8:11

answered Oct 5, 2016 at 8:05

Pranav C Balan

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3 Comments

sheetal Over a year ago

can you explain Date(...a.split(','))

Pranav C Balan Over a year ago

@sheetal : developer.mozilla.org/en/docs/Web/JavaScript/Reference/…

Pranav C Balan Over a year ago

@sheetal : which helps to treat the array value as it's argument

Habibi 27 · Accepted Answer · 2022-09-06 09:16:31Z

0

var mydate = [
  "2016,10,01",
  "2016,09,13",
  "2016,09,05",
  "2016,09,09",
  "2016,10,02"
];

mydate.sort(function(a,b){
  var da = new Date(a).getTime();
  var db = new Date(b).getTime();
  
  return da - db
});
console.log(mydate)

answered Sep 6, 2022 at 9:16

Habibi 27

617 bronze badges

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