how to sort an array or arrays

Question

I have the following array:

[
  '01/12/2020',
  '01/11/2020',
  '01/10/2020',
  '01/09/2020',
  '01/08/2020',
  '01/07/2020',
  '01/06/2020',
  '01/05/2020',
  '01/04/2020'
] [
  1044, 2055, 352,
   183,   76,  19,
     2,   15, 102
]

in this array, each number belongs to each date.

if I sort the dates, naturally, they won´t match the values. How could I make a proper sort so that dates are sorted in ascending order and values match? This is what I would expect to get:

[
      '01/04/2020',
      '01/05/2020',
      '01/06/2020',
      '01/07/2020',
      '01/08/2020',
      '01/09/2020',
      '01/10/2020',
      '01/11/2020',
      '01/12/2020'
    ] [
      102, 15, 2,
       19,   76,  183,
         352,   2055, 1044
    ]

Show us what you have tried. SO isn't a free code writing service. The objective here is for you to post your attempts to solve your own issue and others help when they don't work as expected. See [ask] and [mcve] — charlietfl, Dec 13 '20 at 21:49

score -1 · Answer 1 · answered Dec 13 '20 at 21:54

-1

In Javascript you could do a few different things. The simplest option is to have an array of objects.

see Array.prototype.sort()

answered Dec 13 '20 at 21:54

Andrew Lindzon

71
1
9

score -1 · Accepted Answer · answered Dec 13 '20 at 22:10

Well you need to choose the data type that fits your needs for example in this case you should store the date and the number in one array, so you need a multidementional array cause that makes the work very easy like this:

let arr = [
  ['01/12/2020', 1044],
  ['01/11/2020', 2055],
  ['01/10/2020', 352],
  ['01/09/2020', 183],
  ['01/08/2020', 76],
  ['01/07/2020', 19],
  ['01/06/2020', 2],
  ['01/05/2020', 15],
  ['01/04/2020', 102]
];

console.log(arr.sort((a, b) => a[0] > b[0] ? 1 : -1));

excellent tip thank you so much! – elisa Dec 13 '20 at 22:21 — elisa, Dec 13 '20 at 22:21

score -2 · Answer 3 · answered Dec 13 '20 at 21:49

-2

You can use objects... E.g.

[
  {'01/04/2020': 102},
  {'01/06/2020': 15},
  // ...
]

And see: Sort array of objects by string property value

answered Dec 13 '20 at 21:49

FliegenKLATSCH

35
5

this helped me a lot to "sort" out that I needed to sort at my object level. thank you so much! I got it right :) – elisa Dec 13 '20 at 22:20

how to sort an array or arrays

3 Answers3