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how to remove duplicate array object in javascript

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Restu Wahyu Saputra answered on January 2, 2020 Popularity 10/10 Helpfulness 4/10

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how to remove duplicate array object in javascript

Comment

var arrayWithDuplicates = [
    {"type":"LICENSE", "licenseNum": "12345", state:"NV"},
    {"type":"LICENSE", "licenseNum": "A7846", state:"CA"},
    {"type":"LICENSE", "licenseNum": "12345", state:"OR"},
    {"type":"LICENSE", "licenseNum": "10849", state:"CA"},
    {"type":"LICENSE", "licenseNum": "B7037", state:"WA"},
    {"type":"LICENSE", "licenseNum": "12345", state:"NM"}
];

function removeDuplicates(originalArray, prop) {
     var newArray = [];
     var lookupObject  = {};

     for(var i in originalArray) {
        lookupObject[originalArray[i][prop]] = originalArray[i];
     }

     for(i in lookupObject) {
         newArray.push(lookupObject[i]);
     }
      return newArray;
 }

var uniqueArray = removeDuplicates(arrayWithDuplicates, "licenseNum");
console.log("uniqueArray is: " + JSON.stringify(uniqueArray));

Popularity 10/10 Helpfulness 4/10 Language javascript

Source: stackoverflow.com

Tags: javascript object

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Contributed on Apr 22 2020

Restu Wahyu Saputra

0 Answers Avg Quality 2/10

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how to remove duplicate array object in javascript

Comment

const arr = [{id: 1, name: 'one'}, {id: 2, name: 'two'}, {id: 1, name: 'one'}]

const ids = arr.map(o => o.id)
const filtered = arr.filter(({id}, index) => !ids.includes(id, index + 1))

console.log(filtered)

Popularity 10/10 Helpfulness 10/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Oct 12 2021

DecodeBuzzing

0 Answers Avg Quality 2/10

remove duplicates from array of objects javascript

Comment

let arr = [{name: "john"}, {name: "jane"}, {name: "imelda"}, {name: "john"}];

const uniqueArray = arr.filter((v,i,a)=>a.findIndex(t=>(t.name===v.name))===i)
console.log(uniqueArray);

Popularity 10/10 Helpfulness 7/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Jun 21 2021

Light Lobster

0 Answers Avg Quality 2/10

remove duplicate objects from array javascript

Comments(1)

const addresses = [...]; // Some array I got from async call

const uniqueAddresses = Array.from(new Set(addresses.map(a => a.id)))
 .map(id => {
   return addresses.find(a => a.id === id)
 })

Popularity 10/10 Helpfulness 6/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Jan 02 2020

Ornate Rock Dragon

0 Answers Avg Quality 2/10

how to remove duplicate array object in javascript

Comment

let person = [
{name: "john"}, 
{name: "jane"}, 
{name: "imelda"}, 
{name: "john"},
{name: "jane"}
];

const obj = [...new Map(person.map(item => [JSON.stringify(item), item])).values()];
console.log(obj);

Popularity 10/10 Helpfulness 6/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Apr 22 2020

Restu Wahyu Saputra

0 Answers Avg Quality 2/10

how to remove duplicate array object in javascript

Comment

-1

let person = [
{name: "john"}, 
{name: "jane"}, 
{name: "imelda"}, 
{name: "john"},
{name: "jane"}
];

const data = Array.from(new Set(person.map(JSON.stringify))).map(JSON.parse);
console.log(data);

Popularity 10/10 Helpfulness 6/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Apr 22 2020

Restu Wahyu Saputra

0 Answers Avg Quality 2/10

remove duplicate object from array javascript

Comment

const uniqify = (array, key) => array.reduce((prev, curr) => prev.find(a => a[key] === curr[key]) ? prev : prev.push(curr) && prev, []);

Popularity 9/10 Helpfulness 6/10 Language javascript

Source: stackoverflow.com

Tags: javascript j

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Contributed on Aug 04 2021

Average Alligator

0 Answers Avg Quality 2/10

how to remove duplicate array object in javascript

Comment

let days = ["senin","senin","selasa","selasa","rabu","kamis", "rabu"];
let fullname = [{name: "john"}, {name: "jane"}, {name: "imelda"}, {name: "john"},{name: "jane"}];

// REMOVE DUPLICATE FOR ARRAY LITERAL
const arrOne = new Set(days);
console.log(arrOne);

const arrTwo = days.filter((item, index) => days.indexOf(item) == index);
console.log(arrTwo);


// REMOVE DUPLICATE FOR ARRAY OBJECT
const arrObjOne = [...new Map(person.map(item => [JSON.stringify(item), item])).values()];
console.log(arrObjOne);

const arrObjTwo = Array.from(new Set(person.map(JSON.stringify))).map(JSON.parse);
console.log(arrObjTwo);

Popularity 10/10 Helpfulness 5/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Apr 22 2020

Restu Wahyu Saputra

0 Answers Avg Quality 2/10

how to remove duplicate values in array of objects using javascript

Comment

const array = [{id: 1, name: "hello"}, {id: 2, name: "hii"}, {id: 1, name: "hey"} ]; 
const cleanArray = array.reduce((unique, o) => {
        if(!unique.some(obj => obj.id === o.id)) {
          unique.push(o);
        } 
        return unique;
    },[]);

Popularity 9/10 Helpfulness 5/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Mar 14 2022

Himanshu Makwana

0 Answers Avg Quality 2/10

duplicate value removed in array of object in javascript

Comment

const arr = [{id: 1, name: 'one', position: 1}, {id: 2, name: 'two', position: 2}, {id: 1, name: 'one', position: 3}]

const ids = arr.map(o => o.id)
const filtered = arr.filter(({id}, index) => !ids.includes(id, index + 1))
console.log(filtered,'filtered')

const uniqueArray = arr.filter((v, i, a) => a.findIndex(t => (t.name === v.name)) == i)
console.log(uniqueArray,'uniqueArray');

Popularity 9/10 Helpfulness 5/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Mar 30 2022

$uj@y

0 Answers Avg Quality 2/10

remove duplicates objects from array javascript

Comment

arr.reduce((acc, current) => {
  const x = acc.find(item => item.id === current.id);
  if (!x) {
    return acc.concat([current]);
  } else {
    return acc;
  }
}, []);

Popularity 10/10 Helpfulness 5/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Nov 09 2020

Awful Antelope

0 Answers Avg Quality 2/10

how to remove duplicate array object in javascript

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