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find repeated value in multiple array in object javascript

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Foolish Fox answered on February 19, 2022 Popularity 3/10 Helpfulness 1/10

answer find repeated value in multiple array in object javascript

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find repeated value in multiple array in object javascript

Comment

function findRepeatedValues(obj) {
  const valueCount = {};
  const repeatedValues = [];

  function processObject(obj) {
    for (const key in obj) {
      const value = obj[key];

      if (typeof value === 'string') {
        if (valueCount[value]) {
          if (!repeatedValues.includes(value)) {
            repeatedValues.push(value);
          }
          valueCount[value]++;
        } else {
          valueCount[value] = 1;
        }
      } else if (typeof value === 'object') {
        processObject(value);
      }
    }
  }

  processObject(obj);

  return repeatedValues;
}

const data = {
  "tag parent": {
    "tag section": [
      "tag cat 1",
      "tag cat 2"
    ]
  },
  "tag parent 1": {
    "tag section 2": [
      "tag cat 1",
        "tag cat 2",
        "tag cat 3"
    ]
  }
};

const repeatedValues = findRepeatedValues(data);

Popularity 3/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: find javascript object

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Contributed on Oct 18 2023

Foolish Fox

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

Find Dubplicate In Array of Object

Comment

var family = [{ name: "Mike", age: 10 }, { name: "Matt", age: 13 }, { name: "Nancy", age: 15 }, { name: "Adam", age: 22 }, { name: "Jenny", age: 85 }, { name: "Nancy", age: 2 }, { name: "Carl", age: 40 }],
    unique = [...new Set(family.map(a => a.name))];

console.log(unique);
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Popularity 7/10 Helpfulness 4/10 Language javascript

Source: stackoverflow.com

Tags: find javascript javascri

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Contributed on May 20 2022

Faran Shahid

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 repeated value in multiple array in object javascript

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find repeated value in multiple array in object javascript

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find duplicate values in array object javascript

Find Dubplicate In Array of Object

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