lodash merge
import merge from 'lodash/merge'
let object = { 'a': [{ 'b': 2 }, { 'd': 4 }]};
let other = { 'a': [{ 'c': 3 }, { 'e': 5 }]};
merge(object, other); // => { 'a': [{ 'b': 2, 'c': 3 }, { 'd': 4, 'e': 5 }] }const _quote_filter = _.map(quote_state, (val, key) => { if (val) { return key }})console.log(_quote_filter) //=> [ 'btc', undefined, undefined ]_.each(markets, (obj, key) => { obj.symbol = key})console.log(markets)//=> { 'BTC/USD': { buys: 0, sells: 3, symbol: 'BTC/USD' }, 'DASH/BTC': { buys: 3, sells: 1, symbol: 'DASH/BTC' }, 'ETH/BTC': { buys: 3, sells: 2, symbol: 'ETH/BTC' } }var object = { 'a': [{ 'b': { 'c': 3 } }] }; _.get(object, 'a[0].b.c');// => 3 _.get(object, ['a', '0', 'b', 'c']);// => 3 _.get(object, 'a.b.c', 'default');// => 'default'