Remove duplicates from an array of objects by multiple properties

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Amused Anteater answered on November 9, 2020 Popularity 8/10 Helpfulness 3/10

answer Remove duplicates from an array of objects by multiple properties

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Remove duplicates from an array of objects by multiple properties

Comment

function unique(a, fn) {
  if (a.length === 0 || a.length === 1) {
    return a;
  }
  if (!fn) {
    return a;
  }

  for (let i = 0; i < a.length; i++) {
    for (let j = i + 1; j < a.length; j++) {
      if (fn(a[i], a[j])) {
        a.splice(i, 1);
      }
    }
  }
  return a;
}

const members = [
  { id: 1, name: 'John' },
  { id: 2, name: 'Jane' },
  { id: 1, name: 'John' },
  { id: 4, name: 'Joe' },
];

const uniqueMembers = unique(
  members,
  (a, b) => (a.id === b.id) & (a.name === b.name)
);

console.log(uniqueMembers);
Code language: JavaScript (javascript)

Popularity 8/10 Helpfulness 3/10 Language typescript

Source: www.javascripttutorial.net

Tags: properties typescript

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Contributed on Sep 29 2022

Amused Anteater

0 Answers Avg Quality 2/10

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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 duplicates objects from an array of objects using javascript

Comment

// remove duplicates objects from an array of objects using javascript
let arr = [
  {id: 1, name: 'Chetan'},
  {id: 1, name: 'Chetan'},
  {id: 2, name: 'Ujesh'},
  {id: 2, name: 'Ujesh'},
];
let jsonArray = arr.map(JSON.stringify);
console.log(jsonArray); 
/* 
[
  '{"id":1,"name":"Chetan"}',
  '{"id":1,"name":"Chetan"}',
  '{"id":2,"name":"Ujesh"}',
  '{"id":2,"name":"Ujesh"}'
]
*/

let uniqueArray = [...new Set(jsonArray)].map(JSON.parse);
console.log(uniqueArray);
/* 
[ { id: 1, name: 'Chetan' }, { id: 2, name: 'Ujesh' } ]
*/

Popularity 8/10 Helpfulness 6/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Nov 09 2022

Chetan Nada

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

remove duplicates from array of objects

Comment

const arr = [
  { id: 1, name: "test1" },
  { id: 2, name: "test2" },
  { id: 2, name: "test3" },
  { id: 3, name: "test4" },
  { id: 4, name: "test5" },
  { id: 5, name: "test6" },
  { id: 5, name: "test7" },
  { id: 6, name: "test8" }
];

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

Popularity 9/10 Helpfulness 5/10 Language javascript

Source: dev.to

Tags: javascript j

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Contributed on Aug 08 2022

allan asirraj

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

combine 2 "arrays with objects" and remove object duplicates javascript

Comment

// Join Without Dupes.
const joinWithoutDupes = (A, B) => {
  const a = new Set(A.map(x => x.item))
  const b = new Set(B.map(x => x.item))
  return [...A.filter(x => !b.has(x.item)), ...B.filter(x => !a.has(x.item))]
}

// Proof.
const output = joinWithoutDupes([{item:"apple",description: "lorem"},{item:"peach",description: "impsum"}], [{item:"apple", description: "dolor"},{item:"grape", description: "enum"}])
console.log(output)

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: Grepper

Tags: combine

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Contributed on Jan 21 2021

Rich Raccoon

0 Answers Avg Quality 2/10

How to remove all duplicates from an array of objects

Comment

obj.arr = obj.arr.filter((value, index, self) =>
  index === self.findIndex((t) => (
    t.place === value.place && t.name === value.name
  ))
)

Popularity 9/10 Helpfulness 3/10 Language whatever

Source: stackoverflow.com

Tags: whatever whateve

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Contributed on Sep 20 2022

Happy Hamerkop

0 Answers Avg Quality 2/10

Remove duplicates from an array of objects by multiple properties

Comment

function unique(a, fn) {
  if (a.length === 0 || a.length === 1) {
    return a;
  }
  if (!fn) {
    return a;
  }

  for (let i = 0; i < a.length; i++) {
    for (let j = i + 1; j < a.length; j++) {
      if (fn(a[i], a[j])) {
        a.splice(i, 1);
      }
    }
  }
  return a;
}
Code language: JavaScript (javascript)

Popularity 7/10 Helpfulness 2/10 Language typescript

Source: www.javascripttutorial.net

Tags: properties typescript t

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Contributed on Sep 29 2022

Amused Anteater

0 Answers Avg Quality 2/10

Remove duplicates from an array of objects by multiple properties

Comment

function unique(a, fn) {
  if (a.length === 0 || a.length === 1) {
    return a;
  }
  if (!fn) {
    return a;
  }

  for (let i = 0; i < a.length; i++) {
    for (let j = i + 1; j < a.length; j++) {
      if (fn(a[i], a[j])) {
        a.splice(i, 1);
      }
    }
  }
  return a;
}
Code language: JavaScript (javascript)

Popularity 7/10 Helpfulness 2/10 Language typescript

Source: www.javascripttutorial.net

Tags: properties typescript t

Link to this answer
Share Copy Link

Contributed on Sep 29 2022

Amused Anteater

0 Answers Avg Quality 2/10

Remove duplicates from an array of objects by multiple properties

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Remove duplicates from an array of objects by multiple properties

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