How to sort an array of objects in typescript?

Question

I'm trying to sort by distance of an array of json. I've tried using the .sort() function but I'm unable to make it work. I'm coding in typescript.

sortArr = [
{id: 1, distance: 2.56},
{id: 2, distance: 3.65},
{id: 3, distance: 9.25},
{id: 4, distance: 5.32},
{id: 5, distance: 2.56}
]

sortArr.distance.sort(function(a,b){return a-b;});

"array of json", no. that is an array of objects. json is a serialized data format and is always a string. — Mulan
– Mulan, Commented Jan 31, 2021 at 15:32

Łukasz Karczewski · Accepted Answer · 2021-01-31 15:30:02Z

4

You almost got it right:

sortArr = [
{id: 1, distance: 2.56},
{id: 2, distance: 3.65},
{id: 3, distance: 9.25},
{id: 4, distance: 5.32},
{id: 5, distance: 2.56}
]

sortArr.sort(function(a,b){return a.distance-b.distance;});

answered Jan 31, 2021 at 15:30

Łukasz Karczewski

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Comments

pzaenger · Accepted Answer · 2021-01-31 15:39:19Z

3

You need to call sort on your array:

const array = [
  {id: 1, distance: 2.56},
  {id: 2, distance: 3.65},
  {id: 3, distance: 9.25},
  {id: 4, distance: 5.32},
  {id: 5, distance: 2.56}
];

const sorted = array.sort((a, b) => a.distance - b.distance);
console.log(sorted);

Though, sortArr.distance.sort(function(a, b) { return a-b; }); should at least show one error:

Property 'distance' does not exist on type '{ id: number; distance: number; }[]'.

edited Jan 31, 2021 at 15:39

answered Jan 31, 2021 at 15:32

pzaenger

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Comments

shalini · Accepted Answer · 2021-01-31 15:42:55Z

1

sortArr.sort(function(a,b){return a['distance']-b['distance'];});

answered Jan 31, 2021 at 15:42

shalini

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