return only the fields needed in the array of object by stating the fields need in return

returnObj.js

    /*
    * return obj with the field, used in mostly map()
    * @param    x           {Object}
    * @param    fields      {Array}
    * @returns  {Object[]}
    *
    * Sample Usage
    * const returnFields = ['amount', 'created', 'status'];
    * ArrayObjects.map(x => returnObj(x, returnFields));
    * 
    * Sample return
      { amount: x.amount,
        created: x.created,
        status: x.status }
    * */
    returnObj: (x, fields) => {
        let result = {};
        for (let i = 0; i < fields.length; i++){
            result[fields[i]] = x[fields[i]];
        }
        return result;
    }