使用reduce执行数组处理

Question

我有一个数组，我需要处理提取并形成一个新的对象，这是我现在运行的代码:

data_proces = Object.values(selectedData.reduce((r, { Code, Description, Price}) => {    
r[Description] ??= { Code, Description, Units: 0, Price: 0 , Total: 0};
r[Description].Code= Code;
r[Description].Units++;
r[Description].Price = Price ;
r[Description].Total += Price ;
return r;
}, {}));

这给了我:

[{
"Code": 0,
"Description": "No Factured Act",
"Units": 2,
"Price": 0,
"Total": 0
},
{
"Code": 1,
"Description": "Autopsy",
"Units": 1,
"Price": 44,
"Total": 44
},
{
"Code": 2,
"Description": "Simple Biopsy",
"Units": 3,
"Price": 29,
"Total": 87
},
{
"Code": 1,
"Description": "Citology",
"Units": 4,
"Price": 15,
"Total": 60
},
{
"Code": " -",
"Description": "Free Act",
"Units": 2,
"Price": 56789,
"Total": 91356
}]

这是我想要的结果:

[{
"Code": 0,
"Description": "No Factured Act",
"Units": 2,
"Price": 0,
"Total": 0
},
"Code": 0,
"Description": "No Factured Act",
"Units": 1,
"Price": 0,
"Total": 0
},
{
"Code": 1,
"Description": "Autopsy",
"Units": 1,
"Price": 44,
"Total": 44
},
{
"Code": 2,
"Description": "Simple Biopsy",
"Units": 3,
"Price": 29,
"Total": 87
},
{
"Code": 1,
"Description": "Citology",
"Units": 4,
"Price": 15,
"Total": 60
},
{
"Code": " -",
"Description": "Free Act",
"Units": 1,
"Price": 34567,
"Total": 34567
},
{
"Code": " -",
"Description": "Free Act",
"Units": 1,
"Price": 56789,
"Total": 56789
}]

如你所见，我需要"No Factured Act"one_answers"自由行动";为了不把它们的单位汇总起来，而保持单个值，我如何使用Reduce来实现这一点?

Answer 1

您可以简单地创建一个不希望求和的Description属性数组，如果数组中包含迭代描述，则可以创建唯一键。这里使用reduce()回调的第三个index参数。

const selectedData = [{ "Code": 0, "Description": "No Factured Act", "Price": 0, }, { "Code": 0, "Description": "No Factured Act", "Price": 0, }, { "Code": 1, "Description": "Autopsy", "Price": 44, }, { "Code": 2, "Description": "Simple Biopsy", "Price": 29, }, { "Code": 2, "Description": "Simple Biopsy", "Price": 29, }, { "Code": 2, "Description": "Simple Biopsy", "Price": 29, }, { "Code": 1, "Description": "Citology", "Price": 15, }, { "Code": 1, "Description": "Citology", "Price": 15, }, { "Code": 1, "Description": "Citology", "Price": 15, }, { "Code": 1, "Description": "Citology", "Price": 15, }, { "Code": " -", "Description": "Free Act", "Price": 34567, }, { "Code": " -", "Description": "Free Act", "Price": 56789, }];
const noSum = ['No Factured Act', 'Free Act'];
const data_process = Object.values(
selectedData.reduce((r, { Code, Description, Price }, i) => {
let key = Description;
if (noSum.includes(key)) {
key = `${key}_${i}`;
}
r[key] ??= { Code, Description, Units: 0, Price, Total: 0 };
r[key].Units++;
r[key].Total += Price;
return r;
}, {})
);
console.log(data_process);