deleting a list from another json list in angular js

Question

This is the main json list

allData=
{
    "searchList": [{
        "vaccinationId": 1,
        "vaccinationName": "vacc 1",
        "vaccinationNameAr": null
    }, {
        "vaccinationId": 2,
        "vaccinationName": "vacc 2",
        "vaccinationNameAr": null
    }, {
        "vaccinationId": 3,
        "vaccinationName": "vacc 3",
        "vaccinationNameAr": null
    }, {
        "vaccinationId": 4,
        "vaccinationName": "vacc 4",
        "vaccinationNameAr": null
    }, {
        "vaccinationId": 5,
        "vaccinationName": "vacc 5",
        "vaccinationNameAr": null
    }, {
        "vaccinationId": 6,
        "vaccinationName": "vacc 6",
        "vaccinationNameAr": null
    }]
}

This is the existing json list

alreadyExist = {
    "searchList": [{
        "vaccinationId": 2,
        "vaccinationName": "vacc 2",
        "vaccinationNameAr": null,
        "defaultYn": null
    }, {
        "vaccinationId": 5,
        "vaccinationName": "vacc 5",
        "vaccinationNameAr": null,
        "defaultYn": null
    }]
}

Had to remove the existing data from the main json list, so the result will be

allData = {
    "result": [{
        "vaccinationId": 1,
        "vaccinationName": "vacc 1",
        "vaccinationNameAr": null
    }, {
        "vaccinationId": 3,
        "vaccinationName": "vacc 3",
        "vaccinationNameAr": null
    }, {
        "vaccinationId": 4,
        "vaccinationName": "vacc 4",
        "vaccinationNameAr": null
    }, {
        "vaccinationId": 6,
        "vaccinationName": "vacc 6",
        "vaccinationNameAr": null
    }]
}

How can achieve to get the new all data list by removing the existing data.

Shaishab Roy · Accepted Answer · 2016-03-24 06:20:13Z

1

you can use forEach and map

 alreadyExist.searchList.forEach(function(existInfo) {
       var index = allData.searchList.map(function(e) { return e.vaccinationId;    }).indexOf(existInfo.vaccinationId);

    if(index != -1) {
        allData.searchList.splice(index, 1);
    }
})

answered Mar 24, 2016 at 6:20

Shaishab Roy

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Comments

Badr · Accepted Answer · 2016-03-24 06:18:42Z

0

You may use Lodash for this purpose

allData.searchList = _.differenceBy(allData.searchList, alreadyExist.searchList, 'vaccinationId');

answered Mar 24, 2016 at 6:18

Badr

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1 Comment

Badr Over a year ago

This is method that Lodash Offers. You find this on given link on Lodash. It is a utility library that offer many useful utility methods with great performance

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