Removing specific duplicates from an array Javascript

Question

I have an array like this

const ex = [
    {
        name: 'John',
        sender: "12345678",
        receiver: {
            name: "simi",
            age: 20,
            city: "New York"
        },
         time: 12:30 am
    },
    {
        name: 'Jane',
        sender: {
            name: "simi",
            age: 20,
            city: "New York"
        },
        receiver: "12345678",
        time: 1:00 pm
    }
]

In this array, the sender property value in the first object is equal to the receiver property value in the second object. Is there a way I can check and produce only one occurence of this value, that is, just one object in which the value is present

what does this value mean object value or property value?

EugenSunic
– EugenSunic

2020-09-05 19:48:46 +00:00
Commented Sep 5, 2020 at 19:48 — EugenSunic
– EugenSunic, Commented Sep 5, 2020 at 19:48
property value.

Similoluwa Odeyemi
– Similoluwa Odeyemi

2020-09-05 19:55:23 +00:00
Commented Sep 5, 2020 at 19:55 — Similoluwa Odeyemi
– Similoluwa Odeyemi, Commented Sep 5, 2020 at 19:55

Majed Badawi · Accepted Answer · 2020-09-05 19:52:55Z

1

Try this:

const ex = [
    {
        name: 'John',
        sender: "12345678",
        receiver: {
            name: "simi",
            age: 20,
            city: "New York"
        },
         time: "12:30 am"
    },
    {
        name: 'Jane',
        sender: {
            name: "simi",
            age: 20,
            city: "New York"
        },
        receiver: "12345678",
        time: "1:00 pm"
    }
]

let map = {}
ex.forEach(e => {
     let obj = null;
     if(e.sender instanceof Object) 
          obj = e.sender;
     else if(e.receiver instanceof Object) 
          obj = e.receiver;
     if(!obj) return;
     let key = obj.name+obj.age+obj.city;
     if(!map[key])
          map[key] = e;
});

console.log(Object.values(map));

answered Sep 5, 2020 at 19:52

Majed Badawi

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2 Comments

Similoluwa Odeyemi Over a year ago

Thanks for your response, what if I still want to have it in array. Lets say there's a possibility of have several scenarios like that

Majed Badawi Over a year ago

@SimiloluwaOdeyemi Object.values(map) is another array containing the new unique elements.

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