Get distinct array of objects in javascript

Question

Distinct array of objects as like below; i want to get unique array of objects.

Example Array:

const data = [ { "name": "abc", age: "31", project: "Java" }, { "name": "abc", age: "31", project: "Java" }, { "name": "abc", age: "29", project: "Javascript" }, { "name": "abc", age: "31", project: "C++" }, { "name": "abc", age: "31", project: "Java" }, { "name": "abc", age: "31", project: "Java" }]

Expected Output:

const data = [ { "name": "abc", age: "31", project: "Java" },{ "name": "abc", age: "29", project: "Javascript" }, { "name": "abc", age: "31", project: "C++" }]

Does this answer your question? Get all unique values in a JavaScript array (remove duplicates) — Jan Pfeifer
– Jan Pfeifer, Commented Jan 25, 2023 at 8:27
Do you consider {a:5, b:6} to be the same as {b:6, a:5}? — Andrew Parks
– Andrew Parks, Commented Jan 25, 2023 at 8:31

Angels · Accepted Answer · 2023-01-25 08:43:50Z

1

let unique = [...new Set(data.map(i => JSON.stringify(i)))].map(i => JSON.parse(i));

answered Jan 25, 2023 at 8:43

Angels

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Andrew Parks · Accepted Answer · 2023-01-25 08:38:25Z

1

This approach enforces a consistent key order, and uses JSON.stringify on each object to test for uniqueness.

const data = [ { "name": "abc", age: "31", project: "Java" }, { "name": "abc", age: "31", project: "Java" }, { "name": "abc", age: "29", project: "Javascript" }, { "name": "abc", age: "31", project: "C++" }, { "name": "abc", age: "31", project: "Java" }, { "name": "abc", age: "31", project: "Java" }]

const result = [...new Set(data.map(i=>JSON.stringify(Object.fromEntries(
  Object.entries(i).sort(([a],[b])=>a.localeCompare(b))))
))].map(JSON.parse)

console.log(result)

answered Jan 25, 2023 at 8:38

Andrew Parks

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Rohìt Jíndal · Accepted Answer · 2023-01-25 09:08:08Z

0

As per your data, project property is containing dynamic values. Hence, You can filtered out the duplicates with in a single line of code by using Array.filter() method.

Live Demo :

const data = [ { "name": "abc", age: "31", project: "Java" }, { "name": "abc", age: "31", project: "Java" }, { "name": "abc", age: "29", project: "Javascript" }, { "name": "abc", age: "31", project: "C++" }, { "name": "abc", age: "31", project: "Java" }, { "name": "abc", age: "31", project: "Java" }];

const uniq = {};

var arrFiltered = data.filter(obj => !uniq[obj.project] && (uniq[obj.project] = true));

console.log(arrFiltered);

answered Jan 25, 2023 at 9:08

Rohìt Jíndal

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