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Remove duplicates from an array of objects by multiple properties

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Amused Anteater answered on November 9, 2020 Popularity 7/10 Helpfulness 1/10

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;
}
Code language: JavaScript (javascript)

Popularity 7/10 Helpfulness 1/10 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

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 t

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Contributed on Sep 29 2022

Amused Anteater

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

Link to this answer
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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

Contents

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Remove duplicates from an array of objects by multiple properties

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Remove duplicates from an array of objects by multiple properties

How to remove all duplicates from an array of objects

Remove duplicates from an array of objects by multiple properties

Remove duplicates from an array of objects by multiple properties

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