JS - Sorting array of objects

Question

I'm trying to sort an array of objects in JS, but for some reason it doesnt work :(

This is the code I'm running:

let  myArr = [{"name": "a", "age": 21}, {"name": "b", "age": 18}, {"name": "c", "age": 20}];
console.log(myArr.sort((a, b) => {
    return a["age"] > b["age"];
}))

The output is the same array as it was declared:

[
  { name: 'a', age: 21 },
  { name: 'b', age: 18 },
  { name: 'c', age: 21 }
]

When I looked it up it seemed like it's written as it should, not really sure what went wrong.

Any idea what I did wrong?

You can use - instead of >. So that's myArr.sort((a, b) => a.age - b.age). If you want the eldest first, you can use b.age - a.age. — Dan
– Dan, Commented Mar 29, 2021 at 10:07
Does this answer your question? Sorting an array of objects by property values — Mark Baijens
– Mark Baijens, Commented Mar 29, 2021 at 10:14

DecPK · Accepted Answer · 2021-03-29 10:17:36Z

3

Use - instead of >. It should return a Number type rather than Boolean type. see sort on mdn

let myArr = [
  { name: "a", age: 21 },
  { name: "b", age: 18 },
  { name: "c", age: 20 },
];
console.log(
  myArr.sort((a, b) => {
    return a["age"] - b["age"];
  })
);

Using one-liner syntax using arrow function

let myArr = [
  { name: "a", age: 21 },
  { name: "b", age: 18 },
  { name: "c", age: 20 },
];
console.log(myArr.sort((a, b) => a.age - b.age));

answered Mar 29, 2021 at 10:17

DecPK

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Comments

Md. Saifur Rahman · Accepted Answer · 2023-03-04 15:22:32Z

0

Dataset

let arr = [
    { name: 'A', age: 40 },
    { name: 'B', age: 50 },
    { name: 'C', age: 30 },
]

Sort: Ascending order on age values

arr?.sort((a, b) => {
        return a?.age-b?.age
})

Sort: Descending order on age values

arr?.sort((a, b) => {
        return b?.age-a?.age
})

answered Mar 4, 2023 at 15:22

Md. Saifur Rahman

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JS - Sorting array of objects

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Sort: Ascending order on age values

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Sort: Descending order on age values

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