CODEWITHSUNDEEP
javascript
TIJ
TIJ

Reputation: 3181

Replace an object in object tree

I need to replace an object from in object tree, I tried several methods but I couldn't

let data = [
    {
      "accountId": 2
    }, 
    {
      "accountId": 6,
      "children": [{
        "accountId": 8
      }]
    }, 
    {
      "accountId": 45
    }
];

In above object array I need to replace ( when I know the accoundId )

{
  "accountId": 2
}

to 

{
  "accountId": 2,
  "children": [
    {
      "accountId": 85
    }
  ]
}

Is there any way(s)/library(s) to do that.

Upvotes: 1

Views: 936

Answers (2)

isvforall
isvforall

Reputation: 8926

Plain javascript, using Array.prototype.map function:

var data = [{ "accountId": 2 }, { "accountId": 6, "children": [{ "accountId": 8 }] }, { "accountId": 45 }];

var newData = { "accountId": 2, "children": [{ "accountId": 85 }] };

data = (function upd(data, n) {
    return data.map(e => {
        if (e.children) {
            var o = {};
            o.accountId = e.accountId;
            o.children = upd(e.children, n);
            return o;
        }
        else if (e.accountId == 8) {
            return n;
        } else return e;
    });
})(data, newData);

document.write('<pre>' + JSON.stringify(data, 0, 2) + '</pre>');

Upvotes: 2

Nina Scholz
Nina Scholz

Reputation: 386620

You can use an iterative function for the search for the id and update of the array item.

function makeUpdate(a, u) {
    return Array.isArray(a) && a.some(function (b,i,bb) {
        if (b.accountId === u.accountId) {
            bb[i] = u;
            return true;
        }
        return makeUpdate(b.children, u);
    });
}

var data = [{ "accountId": 2 }, { "accountId": 6, "children": [{ "accountId": 8 }] }, { "accountId": 45 }],
    update = { "accountId": 8, "children": [{ "accountId": 85 }] };

makeUpdate(data, update);
document.write('<pre>' + JSON.stringify(data, 0, 4) + '</pre>');

Upvotes: 1

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