how to find duplicate item in array of object in javascript

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Sore Sloth answered on December 10, 2020 Popularity 10/10 Helpfulness 8/10

answer how to find duplicate item in array of object in javascript

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how to find duplicate item in array of object in javascript

Comment

const values = [
  { name: 'someName1' },
  { name: 'someName2' },
  { name: 'someName3' },
  { name: 'someName1' }
]

const uniqueValues = new Set(values.map(v => v.name));

if (uniqueValues.size < values.length) {
  console.log('uniqueValues')
}

Popularity 10/10 Helpfulness 8/10 Language javascript

Source: stackoverflow.com

Tags: find javascript object

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Contributed on Dec 10 2020

Sore Sloth

0 Answers Avg Quality 2/10

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find only duplicate data javascript object

Comment

const data = [{id: 1, order_id: 1}, {id: 2, order_id: 1}, {id: 3, order_id: 2}]
const duplicates = data.filter((item, index) => 
index !== data.findIndex((v) => v.order_id === item.order_id));

console.log(duplicates)

Popularity 9/10 Helpfulness 7/10 Language javascript

Source: Grepper

Tags: find

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Contributed on Feb 19 2022

Restu Wahyu Saputra

0 Answers Avg Quality 2/10

find duplicate values in array object javascript

Comment

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

find only duplicate data javascript object

Comment

export const findDuplicate = (data: Record<string, any>[]): number[] => {
	const duplicates: number[] = data
		.filter((item: Record<string, any>, index: number) => index !== data.findIndex((v: Record<string, any>) => v.order_id === item.order_id))
		.map((val: Record<string, any>) => val.id)

	return duplicates
}

Popularity 9/10 Helpfulness 3/10 Language javascript

Source: Grepper

Tags: find javascript java

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Contributed on Feb 19 2022

Restu Wahyu Saputra

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

find duplicate objects in array js

Comment

let arr = []
arr.push({place:"here",name:"stuff"});
arr.push({place:"there",name:"morestuff"});
arr.push({place:"there",name:"morestuff"});


arr = arr.filter((value, index, self) =>
                 // return if the index if the matched innerr iteration matches the index of the outer iterator
  index === self.findIndex((t) => (
    t.place === value.place && t.name === value.name
  ))
)

Popularity 1/10 Helpfulness 1/10 Language typescript

Source: stackoverflow.com

Tags: find typescript

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Contributed on Apr 20 2022

eje sunday

0 Answers Avg Quality 2/10

find duplicate objects in array js

Comment

let arr = []
arr.push({place:"here",name:"stuff"});
arr.push({place:"there",name:"morestuff"});
arr.push({place:"there",name:"morestuff"});


arr = arr.filter((value, index, self) =>
// return if the index if the matched innerr iteration matches the index of the outer iterator
  index === self.findIndex((t) => (
    t.place === value.place && t.name === value.name
  ))
)

Popularity 1/10 Helpfulness 1/10 Language javascript

Source: stackoverflow.com

Tags: find javascript

Link to this answer
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Contributed on Apr 20 2022

eje sunday

0 Answers Avg Quality 2/10

how to find duplicate item in array of object in javascript

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how to find duplicate item in array of object in javascript

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find only duplicate data javascript object

find duplicate values in array object javascript

find only duplicate data javascript object

find duplicate values in array object javascript

find duplicate objects in array js

find duplicate objects in array js

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