Question 214862 in Javascript Question posted in
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how to sort in asc in nested array object based on condition using javascript

I have array of object in which i need to sort based on condition using javascript.

I need to sort the others list based on tariffId but in the order 7201, 7202, 7203, 7205, 7204

means always 7204 is the last.rest can be in asc order

var arrobj = [
  {id:1, others: [ {place: "IN", tariffId:7201}, {place: "IN", tariffId:7204}, {place: "IN", tariffId:7203} ] }
  {id:1, others: [ {place: "IN", tariffId:7201}, {place: "IN", tariffId:7204}, {place: "IN", tariffId:7205} ] }
  {id:1, others: [ {place: "IN", tariffId:7202}, {place: "IN", tariffId:7204}, {place: "IN", tariffId:7201} ] }
]

Expected output

 {id:1, others: [ {place: "IN", tariffId:7201}, {place: "IN", tariffId:7203}, {place: "IN", tariffId:7204} ] }
  {id:1, others: [ {place: "IN", tariffId:7201}, {place: "IN", tariffId:7205}, {place: "IN", tariffId:7204} ] }
  {id:1, others: [ {place: "IN", tariffId:7201}, {place: "IN", tariffId:7202}, {place: "IN", tariffId:7204} ] }
]

Tried

var result = arrobj.map(e =>
 e.others.sort((a,b)=> a-b).map(i => i))
;
Tags:

2

Answers


  1. 0

    You had it almost already, just need to move 7204 to the end of the new sorted array.

    const IN = "IN"; //needed for running this example

let arrobj = [
  {id:1, others: [ {place: IN, tariffId:7201}, {place: IN, tariffId:7204}, {place: IN, tariffId:7203} ] },
  {id:1, others: [ {place: IN, tariffId:7201}, {place: IN, tariffId:7204}, {place: IN, tariffId:7205} ] },
  {id:1, others: [ {place: IN, tariffId:7202}, {place: IN, tariffId:7204}, {place: IN, tariffId:7201} ] }
]

arrobj.map(elem =>
  elem.others.sort((a, b) => {
    if (a.tariffId === 7204) return 1; // Move 'a' to the end
    if (b.tariffId === 7204) return -1; // Move 'b' to the end
    return a.tariffId - b.tariffId; // Sort the rest normally
  })
)

console.log(arrobj);
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  2. 0

    There are multiple ways of doing this, but here a simple solution might be to transform 7204 into a large number during sort.

    eg.

    var arrobj = [
    { id: 1, others: [{ place: "IN", tariffId: 7201 }, { place: "IN", tariffId: 7204 }, { place: "IN", tariffId: 7203 }] },
    { id: 1, others: [{ place: "IN", tariffId: 7201 }, { place: "IN", tariffId: 7204 }, { place: "IN", tariffId: 7205 }] },
    { id: 1, others: [{ place: "IN", tariffId: 7202 }, { place: "IN", tariffId: 7204 }, { place: "IN", tariffId: 7201 }] }
]

const last7204 = v => v === 7204 ? 10000000 : v;

var result = arrobj.map(e => {
    e.others = e.others.sort((a, b) => last7204(a.tariffId) - last7204(b.tariffId))
    return e
})

console.log(result)

    A little side note: your using map here, but you might not realise your still mutating the original array. If you do console.log(arrobj) you will see what I mean. A small fix for this would be to do ->

    var result = arrobj.map(e => {
    return [...e.others].sort((a, b) => last7204(a.tariffId) - last7204(b.tariffId))
})
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