Tengo datos en forma de un objeto de matriz. Agruparé los datos y sumaré el total según la fecha y el código.
const data = [ {code: 8, date:"2022-03-24", total:4}, {code: 8, date:"2022-03-24", total:8}, {code: 8, date:"2022-03-25", total:2}, {code: 9, date:"2022-03-24", total:4}, {code: 9, date:"2022-03-25", total:2}, {code: 9, date:"2022-03-25", total:1},]resultados que se esperan
const result = [ {code: 8, date:"2022-03-24", total:12}, {code: 8, date:"2022-03-25", total:2}, {code: 9, date:"2022-03-24", total:4}, {code: 9, date:"2022-03-25", total:3},]puede usar reduce generalmente para estos problemas de agrupación. Estoy tomando la combinación de code y date para agrupar. algo como "8|2022-03-24" .
Así es como se verá el objeto intermedio
{ 8|2022-03-24: { code: 8, date: "2022-03-24", total: 12 }, 8|2022-03-25: { code: 8, date: "2022-03-25", total: 2 }, 9|2022-03-24: { code: 9, date: "2022-03-24", total: 4 }, 9|2022-03-25: { code: 9, date: "2022-03-25", total: 3 } } De ese objeto estoy tomando los valores usando Object.values
const data = [ {code: 8, date:"2022-03-24", total:4}, {code: 8, date:"2022-03-24", total:8}, {code: 8, date:"2022-03-25", total:2}, {code: 9, date:"2022-03-24", total:4}, {code: 9, date:"2022-03-25", total:2}, {code: 9, date:"2022-03-25", total:1},] let grouped = Object.values(data.reduce((acc,{code,date,total})=>{ acc[code+'|'+date] = acc[code+'|'+date] || {code,date,total:0} acc[code+'|'+date].total+=total return acc; },{})) console.log(grouped)