Hay un caso de uso en el que data deben transformarse en un result con el fin de mostrar los datos en la interfaz de usuario en un formato dinámico. Como result , las teclas numeradas son los números de mes y sus valores son la cantidad para ese mes.
const data = [ { date: '10/1/2021', quantity: 47 }, { date: '11/1/2021', quantity: 58 }, { date: '12/1/2021', quantity: 96 }, { date: '1/1/2022', quantity: 88 }, { date: '2/1/2022', quantity: 90 }, ]; const result = [ { year: 2021, 10: 47, 11: 58, 12: 96 }, { year: 2022, 1: 88, 2: 90 } ]; Hasta ahora he creado un intermediate , pero no sé cómo incluirlo en el formato de result final de manera concisa. Se prefieren las soluciones ES6.
const data = [ { date: '10/1/2021', quantity: 47 }, { date: '11/1/2021', quantity: 58 }, { date: '12/1/2021', quantity: 96 }, { date: '1/1/2022', quantity: 88 }, { date: '2/1/2022', quantity: 90 }, ]; const intermediate = data.map(o => { // eslint-disable-next-line no-unused-vars const [month, day, year] = o.date.split('/'); // destructuring assignment return { year: year, [month]: o.quantity } }); console.log(intermediate);Actualizado: de intermediate a result
const intermediate = [ { '10': 47, 'year': '2021' }, { '11': 58, 'year': '2021' }, { '12': 96, 'year': '2021' }, { '1': 88, 'year': '2022' }, { '2': 90, 'year': '2022' } ] const yearDataMap = {} intermediate.forEach(dto => { const storageObj = {} // temp store object Object.entries(dto).forEach(([key, value]) => { // destructure object props if(key === 'year') { storageObj['year'] = value }else { storageObj['month'] = key storageObj['quantity'] = value } }) const {year, month, quantity} = storageObj if (!yearDataMap[year]){ // if no entries with this year preset it with year record yearDataMap[year] = { year } // same as = { year: year } } yearDataMap[year][month] = quantity }) const yearsArr = Object.values(yearDataMap) console.log(yearsArr) De given a result :
const data = [ { date: '10/1/2021', quantity: 47 }, { date: '11/1/2021', quantity: 58 }, { date: '12/1/2021', quantity: 96 }, { date: '1/1/2022', quantity: 88 }, { date: '2/1/2022', quantity: 90 }, ]; const yearDataMap = {} // map to store dates by year data.forEach(dto => { const {date, quantity} = dto const [month, day, year] = date.split('/') if (!yearDataMap[year]){ // if no entries with this year preset it with year record yearDataMap[year] = { year } // same as = { year: year } } yearDataMap[year][month] = quantity // adding quantity by month }) const yearDataArr = Object.values(yearDataMap) // get rid of map and get the `result` console.log(yearDataArr)Tu enfoque no estuvo mal. construí sobre eso. el objetivo era llenar un objeto global. eso fue todo.
globalObj = {} data = [ { date: '10/1/2021', quantity: 47 }, { date: '11/1/2021', quantity: 58 }, { date: '12/1/2021', quantity: 96 }, { date: '1/1/2022', quantity: 88 }, { date: '2/1/2022', quantity: 90 }, ]; data.forEach((o) => { [month, day, year] = o.date.split('/'); if (!globalObj[year]) { globalObj[year] = { year } } globalObj[year][month] = o.quantity }) const result = Object.values(globalObj) console.log(result)Una forma de pasar de intermediate a result :
const data = [ { date: '10/1/2021', quantity: 47 }, { date: '11/1/2021', quantity: 58 }, { date: '12/1/2021', quantity: 96 }, { date: '1/1/2022', quantity: 88 }, { date: '2/1/2022', quantity: 90 }, ]; const intermediate = data.map(o => { // eslint-disable-next-line no-unused-vars const [month, day, year] = o.date.split('/'); // destructuring assignment return { year: year, [month]: o.quantity } }); let years = [...new Set(intermediate.map(o => o.year))]; let accumulator = Object.assign({}, ...years.map(year => ({[year]: {}}))); intermediate.forEach(o => { accumulator[o.year] = { ...accumulator[o.year], ...o }; }); const result = Object.values(accumulator); console.log(result);Pero lo anterior contenía más pasos individuales de los necesarios. terminé haciendo esto -
const data = [ { date: '10/1/2021', quantity: 47 }, { date: '11/1/2021', quantity: 58 }, { date: '12/1/2021', quantity: 96 }, { date: '1/1/2022', quantity: 88 }, { date: '2/1/2022', quantity: 90 }, ]; accumulator = {}; data.forEach(o => { // eslint-disable-next-line no-unused-vars const [month, day, year] = o.date.split('/'); // destructuring assignment accumulator[year] = { ...accumulator[year], year: year, [month]: o.quantity }; }); const result = Object.values(accumulator); console.log(result);