Using Javascript to segregate JSON object attributes into a fresh array

I have over 100 JSON objects in this specific format:

{
"grants":[
{
    "grant":0,
    "ID": "EP/E027261/1",
    "Title": "Semiconductor Research at the Materials-Device Interface",
    "PIID": "6674",
    "Scheme": "Platform Grants",
    "StartDate": "01/05/2007",
    "EndDate": "31/10/2012",
    "Value": "800579"
}, ... more grants

My goal is to extract the EndDate and Value properties into a new array as shown below.

"extractedGrants":[
{
    "EndDate": "31/10/2012",
    "Value": "800579"
}, ... more extracted objects with EndDate and Value properties.

I am attempting to achieve this using array.map(function (a) {}); but I'm struggling with the code inside the function.

Any help would be greatly appreciated.

javascriptarraysjson

Answer №1

To achieve the desired outcome, consider destructuring the object and creating a new object for the resultant array.

var obj = { grants: [{ grant: 0, ID: "EP/E027261/1", Title: "Semiconductor Research at the Materials-Device Interface", PIID: "6674", Scheme: "Platform Grants", StartDate: "01/05/2007", EndDate: "31/10/2012", Value: "800579" }] },
    result = obj.grants.map(({ EndDate, Value }) => ({ EndDate, Value }));

console.log(result);

ES5

var obj = { grants: [{ grant: 0, ID: "EP/E027261/1", Title: "Semiconductor Research at the Materials-Device Interface", PIID: "6674", Scheme: "Platform Grants", StartDate: "01/05/2007", EndDate: "31/10/2012", Value: "800579" }] },
    result = obj.grants.map(function (a) {
        return { EndDate: a.EndDate, Value: a.Value };
    });

console.log(result);

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