Question 110830 in Json Question posted in
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How to compare and manipulate json object

I need to compare and manipulate JSON objects.

First object

let data1 = {
  "id": "111",
  "entity_id": "222",
  "text_id": "333",
  "details": [{
    "value": 1000,
    "comp_id": "444",
    "CompName": "driving"
  }]
}

Second object

let data2 = [{
  "id": "111",
  "text_id": "333",
  "criteria_type": "TXT",
  "value": 1000,
  "comp": {
    "id": "444",
    "name": "driving"
  }
}, {
  "id": "222",
  "text_id": "444",
  "criteria_type": "TXT",
  "value": 2000,
  "comp": {
    "id": "555",
    "name": "swiming"
  }
}]

There are 2 objects data1 and data2. Here, I need to compare the data1.details array with the data2 array key => data1.details.comp_id with data2.comp.id if not match then I need to push value, id and name to data1 object. Please help me to resolve this issue.

Resulting object

data1 will be:

{
  "id": "111",
  "entity_id": "222",
  "text_id": "333", 
  "declaration_details": [{
    "value": 1000,
    "comp_id": "444",
    "CompName": "driving",
  }, {
    "value": 2000,
    "comp_id": "555",
    "CompName": "swiming",
  }]
}
Tags:

3

Answers


  1. 0

    You can use JSON.stringify(yourJsonObject) to convert your objects to strings.
    Then you can compare them like this. areEqual = string1 == string2. Make sure the object properties are in the same order for both objects.

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  2. 0

    Use filter() to find objects in the data2 matching comp.id. Then you can just use map() to create a new array. Finally, you can add the mappedData2 array to the data1 in declaration_details.

    let filteredData2 = data2.filter(item => {
  return data1.details.some(detail => detail.comp_id === item.comp.id);
});
let mapData = filteredData2.map(item => {
  return {
    value: item.value,
    comp_id: item.comp.id,
    CompName: item.comp.name
  };
});
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  3. 0

    Based on your expected result, wouldn’t you just need to map data2 to the declaration_details of the resulting object?

    const main = () => {
  const { details, ...rest } = data1;
  const result = {
    ...rest,
    fbp_year: new Date().getUTCFullYear(),
    declaration_details: data2.map(({
      value,
      comp: {
        id: comp_id,
        name: CompName
      }
    }) => ({
      value,
      comp_id,
      CompName
    }))
  };
  console.log(result);
};


const
  data1 = {
    "id": "111",
    "entity_id": "222",
    "text_id": "333",
    "details": [{
      "value": 1000,
      "comp_id": "444",
      "CompName": "driving"
    }]
  },
  data2 = [{
    "id": "111",
    "text_id": "333",
    "criteria_type": "TXT",
    "value": 1000,
    "comp": {
      "id": "444",
      "name": "driving"
    }
  }, {
    "id": "222",
    "text_id": "444",
    "criteria_type": "TXT",
    "value": 2000,
    "comp": {
      "id": "555",
      "name": "swiming"
    }
  }];
  
main();
    .as-console-wrapper { top: 0; max-height: 100% !important; }
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