[ { cases: {new: '+44', active: 216, critical: 1, recovered: 15364, 1M_pop: '35323', …} continent: "Asia" country: "Brunei" day: "2022-01-10" deaths: {new: null, 1M_pop: '221', total: 98} population: 443851 tests: {1M_pop: '1562743', total: 693625} time: "2022-01-10T16:15:04+00:00" }, { cases: {new: '+2', active: 4, critical: null, recovered: 20, 1M_pop: '34', …} continent: "Oceania" country: "Solomon-Islands" day: "2022-01-10" deaths: {new: null, 1M_pop: null, total: null} population: 711920 tests: {1M_pop: '6321', total: 4500} time: "2022-01-10T16:15:04+00:00" } ]así, tengo 236 matrices de objetos, pero solo quiero unos pocos datos, como país, continente, caso total, etc., y los almacené en la variable usetate, que será solo una matriz de objetos, pero solo tendrá estos datos
let response = [ { cases: { new: '+44', active: 216, critical: 1, recovered: 15364, 1M_pop: '35323', … } continent: "Asia" country: "Brunei" day: "2022-01-10" deaths: { new: null, 1M_pop: '221', total: 98 } population: 443851 tests: { 1M_pop: '1562743', total: 693625 } time: "2022-01-10T16:15:04+00:00" }, { cases: { new: '+2', active: 4, critical: null, recovered: 20, 1M_pop: '34', … } continent: "Oceania" country: "Solomon-Islands" day: "2022-01-10" deaths: { new: null, 1M_pop: null, total: null } population: 711920 tests: { 1M_pop: '6321', total: 4500 } time: "2022-01-10T16:15:04+00:00" } ]; let mappedResponse = response.map(obj => { const { country, continent } = obj; return { country, continent } })si entiendo bien, tienes una matriz con 236 entradas. Si es así, esto es lo que puede hacer:
const results = [ { cases: {new: '+44', active: 216, critical: 1, recovered: 15364, 1M_pop: '35323', …} continent: "Asia" country: "Brunei" day: "2022-01-10" deaths: {new: null, 1M_pop: '221', total: 98} population: 443851 tests: {1M_pop: '1562743', total: 693625} time: "2022-01-10T16:15:04+00:00" }, { cases: {new: '+2', active: 4, critical: null, recovered: 20, 1M_pop: '34', …} continent: "Oceania" country: "Solomon-Islands" day: "2022-01-10" deaths: {new: null, 1M_pop: null, total: null} population: 711920 tests: {1M_pop: '6321', total: 4500} time: "2022-01-10T16:15:04+00:00" } ]; const newArray = results.map(m => { return { country: m.country, cases: m.cases } })