Tengo una matriz que contiene objetos para que cada objeto tenga un tipo diferente (tipo de pared). Estoy tratando de acumular el valor total de cada área para verificar el área total de cada pared:
const walls = [ { typeName: "Sandwichelement - 480mm", area: 28.165, }, { typeName: "Sandwichelement - 480mm", area: 22.165, }, { typeName: "Beton vægelement - 150mm", area: 89.15, }, { typeName: "Beton vægelement - 150mm", area: 165, }, { typeName: "Fundament - 900mm", area: 45.2, }, { typeName: "Fundament - 900mm", area: 16.5, }, ]; const result = walls.reduce((acc, val) => { acc[val.typeName] = { totalArea: 0 }; acc[val.typeName]["totalArea"] += val.area; //the result: //{ //"Beton vægelement - 150mm": {totalArea: 254.15}, //"Fundament - 900mm": {totalArea: 61.7}, //"Sandwichelement - 480mm": {totalArea: 50.33} //} return acc; }, {}); console.log(result);Iterar a través de él y actualizar un objeto de resultado:
const result = {}; for (const {typeName, area} of walls) { if (!result[typeName]) { result[typeName] = {totalArea: 0}; } result[typeName].totalArea += area; } console.log(result); /* { "Beton vægelement - 150mm": {totalArea: 254.15}, "Fundament - 900mm": {totalArea: 61.7}, "Sandwichelement - 480mm": {totalArea: 50.33} } */ const walls = [ { typeName: "Sandwichelement - 480mm", area: 28.165, }, { typeName: "Sandwichelement - 480mm", area: 22.165, }, { typeName: "Beton vægelement - 150mm", area: 89.15, }, { typeName: "Beton vægelement - 150mm", area: 165, }, { typeName: "Fundament - 900mm", area: 45.2, }, { typeName: "Fundament - 900mm", area: 16.5, }, ]; const result = {}; for (const {typeName, area} of walls) { if (!result[typeName]) { result[typeName] = {totalArea: 0}; } result[typeName].totalArea += area; } console.log(result); /* { "Beton vægelement - 150mm": {totalArea: 254.15}, "Fundament - 900mm": {totalArea: 61.7}, "Sandwichelement - 480mm": {totalArea: 50.33} } */Solo tiene que iterar su matriz de paredes. En mi caso, uso un bucle foreach y le agrego los objetos con los totales.
const walls = [ { typeName: "Sandwichelement - 480mm", area: 28.165, }, { typeName: "Sandwichelement - 480mm", area: 22.165, }, { typeName: "Beton vægelement - 150mm", area: 89.15, }, { typeName: "Beton vægelement - 150mm", area: 165, }, { typeName: "Fundament - 900mm", area: 45.2, }, { typeName: "Fundament - 900mm", area: 16.5, }, ]; const s = {}; walls.forEach((val) => { if (! s[val.typeName]){ s[val.typeName] = { totalArea: 0 }; s[val.typeName]["totalArea"] += val.area; } else { s[val.typeName]["totalArea"] += val.area; } }); console.log("sum", s)