check duplication or existing object in an array

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Enthusiastic Eel answered on November 17, 2020 Popularity 7/10 Helpfulness 2/10

answer check duplication or existing object in an array

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check duplication or existing object in an array

Comment

const checkObjectExist = (obj,list) => {
  let i;
  for (i = 0; i < list.length; i++) {
    if (list[i] === obj) {
      return true;
    }
  }
  return false;
}

Popularity 7/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: javascript object

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Contributed on Jan 27 2023

Enthusiastic Eel

0 Answers Avg Quality 2/10

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find duplicate values in array object javascript

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const values = [{id: 10, name: 'someName1'}, {id: 10, name: 'someName2'}, {id: 11, name:'someName3'}, {id: 12, name: 'someName4'}];

const lookup = values.reduce((a, e) => {
  a[e.id] = ++a[e.id] || 0;
  return a;
}, {});

console.log(values.filter(e => lookup[e.id]));
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Popularity 10/10 Helpfulness 6/10 Language javascript

Source: stackoverflow.com

Tags: find

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Contributed on Feb 19 2022

Restu Wahyu Saputra

0 Answers Avg Quality 2/10

check which is dubicate in object of array

Comment

const arry = [1, 2, 1, 3, 4, 3, 5];

const toFindDuplicates = arry => arry.filter((item, index) => arr.indexOf(item) !== index)
const duplicateElementa = tofindDuplicates(arry);
console.log(duplicateElements);

// Output: [1, 3]

Popularity 8/10 Helpfulness 4/10 Language javascript

Source: flexiple.com

Tags: javascript j

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Contributed on May 20 2022

Faran Shahid

0 Answers Avg Quality 2/10

js check if array of objects contains duplicates

Comment

const arrayOfObjCopy = [...arrayOfObj];

Object.keys(arrayOfObjCopy).forEach((key) => {
  arrayOfObjCopy[key] = JSON.stringify(arrayOfObjCopy[key]);
 });

const arrayOfObjhasDuplicates = uniq(arrayOfObjCopy).length != arrayOfObjCopy.length;

Popularity 10/10 Helpfulness 4/10 Language javascript

Source: Grepper

Tags: contains contain

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Contributed on Nov 17 2020

Ugliest Unicorn

0 Answers Avg Quality 2/10

find duplicate values in array object javascript

Comment

duplicateIds = arr
     .map(e => e['id'])
     .map((e, i, final) => final.indexOf(e) !== i && i)
     .filter(obj=> arr[obj])
     .map(e => arr[e]["id"])

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: stackoverflow.com

Tags: find

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Contributed on Feb 19 2022

Restu Wahyu Saputra

0 Answers Avg Quality 2/10

check duplication or existing object in an array

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check duplication or existing object in an array

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find duplicate values in array object javascript

check which is dubicate in object of array

js check if array of objects contains duplicates

find duplicate values in array object javascript

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