Question

142

Sort array of objects by multiple properties of string type

rated 0 times [ 143] [ 1] / answers: 1 / hits: 8106 / 4 Years ago, wed, september 2, 2020, 12:00:00

I am sorting my array in JavaScript based on names after then I am sorting it based in joinDate but somehow it is not checking for joiningDate.

Unfortunately, I can't use an if-else condition - I only want to use ternary operators.

My code is like this:

person.sort(((a, b) => (a.name > b.name)  ? 1 : (a.joinDate > b.joinDate) ? 1 : -1));

It is sorting the names but not sorting the joinDate property

My list look like this:

{

"data": [

     {

         "id": "fdsf",

         "name": "Julie",

         "joinDate": "01/10/2019"



      },

    ]

}

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kristinsonjab

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answered 4 Years ago byrondonavanc · Accepted Answer

The test should be (assuming your date format is dd/mm/yyyy)

if (a.name > b.name) return 1;

if (a.name < b.name) return -1;

let [a_dd, a_mm, a_yy] = a.joindate.split("/");

let [b_dd, b_mm, b_yy] = b.joindate.split("/");

if (a_yy !== b_yy) return a_yy - b_yy;

if (a_mm !== b_mm) return a_mm - b_mm;

if (a_dd !== b_dd) return a_dd - b_dd;

return 0;