How to get matching elements from array and change array object?

Hussain Published at Dev

hussain

if array has matching ids change object to one object without effecting original array with below code it returns only matching objects but i want expected result as mentioned

main.ts

const arr = [{
            "body": {
                "specialtyID": "7114798",
                "sourceSystem": "HBS",
                "rxInfos": [{
                    "drugNdc": "00445450085",
                    "rxNumber": "14678904"
                }]

            },
            {
                "body": {
                    "specialtyID": "7114798",
                    "sourceSystem": "HBS",
                    "rxInfos": [{
                        "drugNdc": "00004080085",
                        "rxNumber": "1459004"
                    }]
                }
            },
            {
                "body": {
                    "specialtyID": "7908398",
                    "sourceSystem": "HBS",
                    "rxInfos": [{
                        "drugNdc": "06789955085",
                        "rxNumber": "1478604"
                    }]
                }
            }

        ]


        const tempArray = arr;

        function arrayMatch(temp, arr) {
            const finalArray = [];
            arr.forEach((element) => {
                    tempArray.forEach((temp) => {
                            if (temp.speicaltyID === element.specialtyID) {
                                temp.rxInfos.forEach((rxInfo) => {
                                    element.rxInfos.push(rxInfo);
                                });
                            }
                        }
                        finalArray = arr;

                    });
                return finalArray

            }

expected output

 const arr = [{
                        "body": {
                            "specialtyID": "7114798",
                            "sourceSystem": "HBS",
                            "rxInfos": [{
                                    "drugNdc": "00445450085",
                                    "rxNumber": "14678904"
                                },
                                {
                                    "drugNdc": "00004080085",
                                    "rxNumber": "1459004"
                                }
                            ]
                        },
                        {
                            "body": {
                                "specialtyID": "7908398",
                                "sourceSystem": "HBS",
                                "rxInfos": [{
                                    "drugNdc": "06789955085",
                                    "rxNumber": "1478604"
                                }]
                            }
                        }

                    ]

KShewengger

You can try this method to achieve your desired result:

const result = arr.reduce((container, value) => {
    const compare     = ({ body }) => body.specialtyID === value.body.specialtyID;
    const isExists    = container.some(compare);
    const pushRxInfos = container.map(item => compare(item) ? item.body.rxInfos.push(...value.body.rxInfos) : item);

    isExists ? pushRxInfos : container.push(value);

    return container;
}, []);

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