Need Help in Convert Arrays of Objects into Single Array using Javascript

Question

I am trying to convert nested levels array of objects into a single array using a recursive function.

Below is my nested level json object that I need to convert into a single array

[{"CodiacSDK.NewModule.dll;extensionCreatePre;":[{"CodiacSDK.NewModule.dll;extensionExecutePost;":[{"CodiacSDK.PythonWrapper.dll;UnitValues::extensionInquirePre;":[]}]}]}]

I tried many recursive functions but none is working according to my requirement.

Like this one

function flatten(obj) {
var empty = true;
if (obj instanceof Array) {
    str = '[';
    empty = true;
    for (var i=0;i<obj.length;i++) {
        empty = false;
        str += flatten(obj[i])+', ';
    }
    return (empty?str:str.slice(0,-2))+']';
} else if (obj instanceof Object) {
    str = '{';
    empty = true;
    for (i in obj) {
        empty = false;
        str += i+'->'+flatten(obj[i])+', ';
    }
    return (empty?str:str.slice(0,-2))+'}';
} else {
    return obj; // not an obj, don't stringify me
}

}

My expected output is

["CodiacSDK.NewModule.dll;extensionCreatePre;", "CodiacSDK.NewModule.dll;extensionExecutePost;", "CodiacSDK.PythonWrapper.dll;UnitValues::extensionInquirePre;"];

Any help is really appreciated. Thanks in advance.

I think those all should be the string, I've updated my output array. — user2935236
– user2935236, Commented Jul 30, 2018 at 11:15

Nina Scholz · Accepted Answer · 2018-07-30 11:27:21Z

2

You could use a recursive function for flattening the array of objects.

function getFlat(array) {
    return array.reduce(
        (r, o) => Object.entries(o).reduce((p, [k, v]) => [k, ...getFlat(v)], r),
        []
    );
}

var data = [{ "CodiacSDK.NewModule.dll;extensionCreatePre;": [{ "CodiacSDK.NewModule.dll;extensionExecutePost;": [{ "CodiacSDK.PythonWrapper.dll;UnitValues::extensionInquirePre;": [] }] }] }]

console.log(getFlat(data));

.as-console-wrapper { max-height: 100% !important; top: 0; }

edited Jul 30, 2018 at 11:27

answered Jul 30, 2018 at 11:20

Nina Scholz

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4 Comments

user2935236 Over a year ago

Wow, that's great, perfectly working. Thank you very much.

user2935236 Over a year ago

Little problem, when I am using this code on client server, it shows this error : Uncaught TypeError: array.reduce is not a function, any suggestion what can be the issue here?

Nina Scholz Over a year ago

where are you running it?

user2935236 Over a year ago

Sorry, the server took time to update the code. Everything is fine now.

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