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javascript - 如何通过cpf获得销售的总结果？

问题描述

我想按 CPF 将总销售额加起来，我设法将 CPF 分开，但我现在忘记了如何计算总和，请参阅下面的代码

 var vendas = [{cpf: "14382435021", amount: 34.5 }, { cpf: "79785337006", amount: 12 }, { cpf: "79785337006", amount: 23.16 }, { cpf: "14382435021", amount: 46.4 }, { cpf: "88835414059", amount: 26.2 }, { cpf: "88835414059", amount: 199.9 }, { cpf: "79785337006", amount: 18.16 } ]

var resultados = {};
for(var i = 0; i < vendas.length; i++){
    if(vendas[i].cpf){
        if(!resultados[vendas[i].cpf]){
            resultados[vendas[i].cpf] = []
        }
        resultados[vendas[i].cpf].push(vendas[i]);
    }
}

console.log(resultados)

标签： javascript

解决方案

<script>
    var vendas = [{cpf: "14382435021", amount: 34.5 }, { cpf: "79785337006", amount: 12 }, { cpf: "79785337006", amount: 23.16 }, { cpf: "14382435021", amount: 46.4 }, { cpf: "88835414059", amount: 26.2 }, { cpf: "88835414059", amount: 199.9 }, { cpf: "79785337006", amount: 18.16 } ]

    var result = [];
    vendas.reduce(function(res, value) {
        if (!res[value.cpf]) {
            res[value.cpf] = { cpf: value.cpf, amount: 0 };
            result.push(res[value.cpf])
        }
        res[value.cpf].amount += value.amount;
        return res;
    }, {});

    console.log(result)

</script>

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