Typescript - group and filters objects in an array according to multiple value

Say we have array like:

[

id: 0,
name: 'A'
longitude: 10
latitude: 12
,

id: 1,
name:'B'
longitude: 10
latitude: 12
,

id: 2,
name: 'C'
longitude: 11
latitude: 10
,

id: 3,
name: 'D'
longitude: 11
latitude: 15

]


I want to get an array of object that have the same longitude and latitude like:

[
[

id: 0,
name: 'A'
longitude: 10
latitude: 12
,

id: 1,
name:'B'
longitude: 10
latitude: 12

]
]


The only way that came to mind is looping through the array to get coordinates and the number of objects there, then getting an subarray for each of these coordinates if the length is greater than 1 but the process is quite complex. I am using this in a redux react app, and this is calculated after each state change before rerendering.

Is there a more effective way of doing this? I want to group those with the same longitude and latitude.

1 Answer
1

You can sort the data by longitude and latitude. Next, you need to loop through the data and push your matching objects to a temporary array as shown below. At the end, you can return your temp array.

longitude

latitude

const arr = [
id: 0,
name: 'A',
longitude: 10,
latitude: 12,
,


id: 2,
name: 'C',
longitude: 11,
latitude: 10,
,

id: 3,
name: 'D',
longitude: 11,
latitude: 15,
,

id: 1,
name: 'B',
longitude: 10,
latitude: 12

];

function cleanData(data)
data.sort(function (a, b)
return a.longitude - b.longitude );
let tempArr = ;
for (let i = data.length - 1; i >=1 ; i--)
if (data[i].hasOwnProperty('longitude'))
if (data[i].longitude === data[i - 1].longitude &&
data[i].latitude === data[i - 1].latitude)
tempArr.push(data[i], data[i - 1]);


else
return;



console.log([...[tempArr]]);


cleanData(arr);

Thanks for contributing an answer to Stack Overflow!

But avoid …

To learn more, see our tips on writing great answers.

Some of your past answers have not been well-received, and you're in danger of being blocked from answering.

Please pay close attention to the following guidance:

But avoid …

To learn more, see our tips on writing great answers.

Required, but never shown

Required, but never shown

By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.