Sorting of two-dimensional Array not working

Question

I have this array, I want to sort it ticketid wise, which is a number. Below is the code I am trying

    console.log(this.tableData);
    var filtered_tableData = this.tableData.sort((a, b)=> a.ticketid- b.ticketid)
    console.log(filtered_tableData);

But it is not sorting as expected.

Here is my array:

Edit 1

After trying this code, my result array still remains the same

    console.log(this.tableData);
    var filtered_tableData = this.tableData.sort((a,b) => (a.ticketid > b.ticketid) ? 1 : ((b.ticketid > a.ticketid) ? -1 : 0)); 
    console.log(filtered_tableData);

Please note this.tableData and filtered_tableData result is same in console.log.

See image below

It's not a 2-d array, btw - it's an array of objects.

Josh Wulf
– Josh Wulf

2020-07-28 12:53:27 +00:00
Commented Jul 28, 2020 at 12:53 — Josh Wulf
– Josh Wulf, Commented Jul 28, 2020 at 12:53

Karim · Accepted Answer · 2020-07-28 12:49:51Z

2

Change the sort callback to specify a descending order, and you don't need a new reference variable (filtered_tableData) because the sort acts on the original reference tableData

const tableData = [{ ticketid: 24}, { ticketid: 12 }, { ticketid: 90 }]
tableData.sort((a, b) => a.ticketid > b.ticketid ? -1 : 1)
console.log(tableData)

answered Jul 28, 2020 at 12:49

Karim

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6 Comments

Nikita Madeev Over a year ago

what's the difference a.ticketid > b.ticketid ? -1 : 1 and b.ticketid - a.ticketid?

Karim Over a year ago

@NikitaMadeev you can do that as well but you need to change the compare function accordingly developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/…

user2828442 Over a year ago

your answer is not working with my array of objects, do we need to do something else ?

Karim Over a year ago

what is not working exactly? if you check the code snippet above with a generic array of objects which is a subset of yours, it works fine, post the new output

user2828442 Over a year ago

New output is same

|

MohammedElmsellem · Accepted Answer · 2020-07-28 12:51:29Z

1

descending sort should be b.ticketid - a.ticketid:

let ar = [{ticketid:3},{ticketid:5},{ticketid:2}]
    var filtered_tableData = ar.sort((a, b)=> b.ticketid - a.ticketid)
    console.log(filtered_tableData);

answered Jul 28, 2020 at 12:51

MohammedElmsellem

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2 Comments

user2828442 Over a year ago

Doesnt work, i have updated my question, see edit :: 1

MohammedElmsellem Over a year ago

maybe parent object change definition of sort method, try to clone the array and sort them: let nar = tableData.map(i => i).sort((a, b)=> b.ticketid - a.ticketid)

Relu · Accepted Answer · 2020-07-28 12:48:58Z

0

Have you tried variations of:

sort((a, b)=> b.ticketid - a.ticketid)
sort((b, a)=> b.ticketid - a.ticketid)
sort((b, a)=> a.ticketid - b.ticketid)

My background is C# so it's just a shot in the dark but thought it might help.

answered Jul 28, 2020 at 12:48

Relu

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