const skns = require('../data/skns.json');
const newskns = require('./addskns.json');
const _ = require('lodash');

const addskns = [];

_.forEach(newskns, skn => {
  const find = _.find(skns, s => s.yhId === skn.yhId);

  if (find) {
    if (find.productId !== skn.productId) {
      find.productId = skn.productId;
      console.log('change', find)
    }
  } else {
    addskns.push(skn);
  }
});
console.log(JSON.stringify(addskns))