Merge 2 arrays v.efficiently set against the match of one field from one and one field form the other set. Maintain properties from both

merge.js

const rootResolvers = {
    Query: {
        coins: async (_, { limit, offset }) => {
            const initialLimit = process.env.LIMIT || limit;
            const initialOffset = offset || 0;

            const cmc = await fetchCmcListFn(initialLimit, initialOffset);
            const cc = await fetchCcListFn();

            const coinListWithCcId = lodash(cmc) // start sequence
                .keyBy('symbol') // create a dictionary of the 1st array
                .merge(lodash.keyBy(cc, 'Symbol')) // create a dictionary of the 2nd array, and merge it to the 1st
                .values() // turn the combined dictionary to array
                .value() // get the value (array) out of the sequence
                .filter((coin) => typeof coin.cmc_rank !== 'undefined'); // remove coins without rank value

            return coinListWithCcId;
        },
    },
};