How to remove duplicate object values from the array which is nested inside the object of an array?

Question

I have array structure as shown in below

[
  {
    "id": "cbdfc96a-c788-45cd-bdd1-7d573cc8c474",
    "refId": "1",
    "reference": "<p>1646 Journal of Investigative Dermatology ( 2017 ) , Volume 137</p>",
    "list": [
      {
        "text": "<p>Annot 1</p>",
        "id": "e9c207ae-3d08-4eb2-94d1-b6ae713862d3"
      },
      {
        "text": "<p>Annot 1</p>",
        "id": "e1486639-aa46-4513-992b-17d8d66f06c8"
      }
    ]
  },
  {
    "id": "90b187ab-26ef-45c0-a6a0-bf7dcfde660f",
    "refId": "2",
    "reference": "<p>ZK Jabbar - Lopez et al . Evaluation of Biologic Therapy Options for Psoriasis</p>",
    "list": [
      {
        "text": "<p>Annot 2</p>",
        "id": "fc430895-912a-4e4b-884c-f08600e06ec8"
      },
      {
        "text": "<p>Annot 2 3</p>",
        "id": "a1296b1f-530e-4e1b-b2d0-f97bba192a1a"
      },
      {
        "text": "<p>Annot 2 3</p>",
        "id": "090737d5-48ac-4e3f-973d-9e1de206252b"
      },
      {
        "text": "<p>Annot 2</p>",
        "id": "6d5f89be-305e-4751-a7ca-75d9b0f2057e"
      }
    ]
  },
  {
    "id": "e8c3a958-7fa4-40e1-a83a-44c85ebb05a7",
    "refId": "3",
    "reference": "<p>Table 2. Relative treatment rankings ( outcomes at 12 to 16 wk )</p>",
    "list": [
      {
        "text": "<p>Annot 3</p>",
        "id": "f9082af8-3c2f-477b-b113-a96f320415d1"
      },
      {
        "text": "<p>Annot 3</p>",
        "id": "2d7e65b8-e516-40bf-8957-c0fb4b819aa9"
      }
    ]
  }
]

Expected result is

[
  {
    "id": "cbdfc96a-c788-45cd-bdd1-7d573cc8c474",
    "refId": "1",
    "reference": "<p>1646 Journal of Investigative Dermatology ( 2017 ) , Volume 137</p>",
    "list": [
      {
        "text": "<p>Annot 1</p>",
        "id": "e9c207ae-3d08-4eb2-94d1-b6ae713862d3"
      }
    ]
  },
  {
    "id": "90b187ab-26ef-45c0-a6a0-bf7dcfde660f",
    "refId": "2",
    "reference": "<p>ZK Jabbar - Lopez et al . Evaluation of Biologic Therapy Options for Psoriasis</p>",
    "list": [
      {
        "text": "<p>Annot 2</p>",
        "id": "fc430895-912a-4e4b-884c-f08600e06ec8"
      },
      {
        "text": "<p>Annot 2 3</p>",
        "id": "a1296b1f-530e-4e1b-b2d0-f97bba192a1a"
      }
    ]
  },
  {
    "id": "e8c3a958-7fa4-40e1-a83a-44c85ebb05a7",
    "refId": "3",
    "reference": "<p>Table 2. Relative treatment rankings ( outcomes at 12 to 16 wk )</p>",
    "list": [
      {
        "text": "<p>Annot 3</p>",
        "id": "f9082af8-3c2f-477b-b113-a96f320415d1"
      }
    ]
  }
]

I have tried this solution but didnot get the expected result.

const finalListmergedArray = [
  {
    "id": "cbdfc96a-c788-45cd-bdd1-7d573cc8c474",
    "refId": "1",
    "reference": "<p>1646 Journal of Investigative Dermatology ( 2017 ) , Volume 137</p>",
    "list": [
      {
        "text": "<p>Annot 1</p>",
        "id": "e9c207ae-3d08-4eb2-94d1-b6ae713862d3"
      },
      {
        "text": "<p>Annot 1</p>",
        "id": "e1486639-aa46-4513-992b-17d8d66f06c8"
      }
    ]
  },
  {
    "id": "90b187ab-26ef-45c0-a6a0-bf7dcfde660f",
    "refId": "2",
    "reference": "<p>ZK Jabbar - Lopez et al . Evaluation of Biologic Therapy Options for Psoriasis</p>",
    "list": [
      {
        "text": "<p>Annot 2</p>",
        "id": "fc430895-912a-4e4b-884c-f08600e06ec8"
      },
      {
        "text": "<p>Annot 2 3</p>",
        "id": "a1296b1f-530e-4e1b-b2d0-f97bba192a1a"
      },
      {
        "text": "<p>Annot 2 3</p>",
        "id": "090737d5-48ac-4e3f-973d-9e1de206252b"
      },
      {
        "text": "<p>Annot 2</p>",
        "id": "6d5f89be-305e-4751-a7ca-75d9b0f2057e"
      }
    ]
  },
  {
    "id": "e8c3a958-7fa4-40e1-a83a-44c85ebb05a7",
    "refId": "3",
    "reference": "<p>Table 2. Relative treatment rankings ( outcomes at 12 to 16 wk )</p>",
    "list": [
      {
        "text": "<p>Annot 3</p>",
        "id": "f9082af8-3c2f-477b-b113-a96f320415d1"
      },
      {
        "text": "<p>Annot 3</p>",
        "id": "2d7e65b8-e516-40bf-8957-c0fb4b819aa9"
      }
    ]
  }
]
    // Loop through array values
    for (let i = 0; i < finalListmergedArray.length; i++) {
      for (
        let j = 0;
        j < finalListmergedArray[i]["list"].length;
        j++
      ) {
        var result = [
          ...new Map(
            finalListmergedArray[i]["list"].map((o) => [
              JSON.stringify(o),
              o,
            ])
          ).values(),
        ];
        finalListmergedArray[i]["list"] = result;
      }
    }
    console.log(finalListmergedArray)

Any help would be appreciated. Thanks, in advance.

Rafael Buzatto de Campos · Accepted Answer · 2021-01-21 04:13:30Z

1

you want to remove text duplicates values from list attribute. To be clear, those objects are actually unique because each one has an unique id.

An approach to solve this is to create a Map to store unique text values for each object. Then you filter your list, validate if text is included at your Map. If it's included you return false, otherwise you add text to your Map and return true:

// data here is your array
const filteredData = data.map(item => {
  const includedText = new Map()
  const list = item.list.filter(content => {
    if (includedText.has(content.text)) return false
    includedText.set(content.text)
    return true
  })

  return { ...item, list }
})

console.log(filteredData)

answered Jan 21, 2021 at 4:13

Rafael Buzatto de Campos

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Comments

Yogesh Patil · Accepted Answer · 2021-01-21 04:23:12Z

Assuming you want to merge with text in the list, you can use a list to store the processed elements. Below is the code snipped for the same.

const input = [
  {
    "id": "cbdfc96a-c788-45cd-bdd1-7d573cc8c474",
    "refId": "1",
    "reference": "<p>1646 Journal of Investigative Dermatology ( 2017 ) , Volume 137</p>",
    "list": [
      {
        "text": "<p>Annot 1</p>",
        "id": "e9c207ae-3d08-4eb2-94d1-b6ae713862d3"
      },
      {
        "text": "<p>Annot 1</p>",
        "id": "e1486639-aa46-4513-992b-17d8d66f06c8"
      }
    ]
  },
  {
    "id": "90b187ab-26ef-45c0-a6a0-bf7dcfde660f",
    "refId": "2",
    "reference": "<p>ZK Jabbar - Lopez et al . Evaluation of Biologic Therapy Options for Psoriasis</p>",
    "list": [
      {
        "text": "<p>Annot 2</p>",
        "id": "fc430895-912a-4e4b-884c-f08600e06ec8"
      },
      {
        "text": "<p>Annot 2 3</p>",
        "id": "a1296b1f-530e-4e1b-b2d0-f97bba192a1a"
      },
      {
        "text": "<p>Annot 2 3</p>",
        "id": "090737d5-48ac-4e3f-973d-9e1de206252b"
      },
      {
        "text": "<p>Annot 2</p>",
        "id": "6d5f89be-305e-4751-a7ca-75d9b0f2057e"
      }
    ]
  },
  {
    "id": "e8c3a958-7fa4-40e1-a83a-44c85ebb05a7",
    "refId": "3",
    "reference": "<p>Table 2. Relative treatment rankings ( outcomes at 12 to 16 wk )</p>",
    "list": [
      {
        "text": "<p>Annot 3</p>",
        "id": "f9082af8-3c2f-477b-b113-a96f320415d1"
      },
      {
        "text": "<p>Annot 3</p>",
        "id": "2d7e65b8-e516-40bf-8957-c0fb4b819aa9"
      }
    ]
  }
]
//Solution....
input.forEach(function(i) {
    let processed = [];
    const newList = [];
    i.list.forEach(function(l) {
      if( processed.indexOf(l.text) < 0 ) { //id not in list
        newList.push(l);
        processed.push(l.text);
      }
    });
    i.list = newList;
});


console.log(input);

jdoroy · Accepted Answer · 2021-01-21 04:02:19Z

To solve with Rambda:

const expected = R.map(({list, ...rest}) => ({
  ...rest,
  list: R.uniqWith(R.eqProps('text'))(list)
}))(input)

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