Dynamically calculate the average for a nested collection using lodash

Question

I have a JSON array of objects (a collection) like:

[{
  \"x\": {
        \"x1\": 1
  },
  \"y\": {
    \"yt\": 0,
    \"zt\": 4,
    \"qa\": 3,
    \"ft\": 0,
          


        

Answer 1

You could first collect and sum all values in the same data structure and then calculkate the average by a division with the length of the given array.

function getParts(array, result) {
    function iter(o, r) {
        Object.keys(o).forEach(function (k) {
            if (o[k] && typeof o[k] === 'object') {
                return iter(o[k], r[k] = r[k] || {});
            }
            r[k] = (r[k] || 0) + o[k];
        });
    }

    function avr(o) {
        Object.keys(o).forEach(function (k) {
            if (o[k] && typeof o[k] === 'object') {
                return avr(o[k]);
            }
            o[k] = o[k] /data.length;
        });
    }

    data.forEach(function (a) {
        iter(a, result);
    });
    avr(result);
}

var data = [{ x: { x1: 1 }, y: { yt: 0, zt: 4, qa: 3, ft: 0, } }, { x: { x1: 5 }, y: { yt: 10, zt: 2, qa: 0, ft: 0, } }],
    result = {};

getParts(data, result);

console.log(result);

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