操作 javascript 对象数组以获得一组新的对象数组

Question

我有这个对象数组const unitsAndRates = [  {    propertyUnitType: "store",    propertyUnitRate: "20000",    numberOfUnit: 4  },  {    propertyUnitType: "duplex",    propertyUnitRate: "20000",    numberOfUnit: 3  }];我需要像上面生成的数组这样的东西。const generated = [  {    propertyUnitType: "store1",    propertyUnitRate: "20000"  },  {    propertyUnitType: "store2",    propertyUnitRate: "20000"  },  {    propertyUnitType: "store3",    propertyUnitRate: "20000"  },  {    propertyUnitType: "store4",    propertyUnitRate: "20000"  },  {    propertyUnitType: "duplex1",    propertyUnitRate: "20000"  },  {    propertyUnitType: "duplex2",    propertyUnitRate: "20000"  },  {    propertyUnitType: "duplex3",    propertyUnitRate: "20000"  }];考虑到 ，我怎样才能生成上面的输出numberOfUnit？

Answer 1

这可以使用 来完成Array.prototype.flatMap。

const unitsAndRates = [

  {

    propertyUnitType: "store",

    propertyUnitRate: "20000",

    numberOfUnit: 4

  },

  {

    propertyUnitType: "duplex",

    propertyUnitRate: "20000",

    numberOfUnit: 3

  }

];

const result = unitsAndRates.flatMap((item) => [...Array(item.numberOfUnit).keys()].map((index) => ({

  propertyUnitType: item.propertyUnitType + (index + 1),

  propertyUnitRate: item.propertyUnitRate

})));

console.log(result);

Answer 2

unitsAndRates.map(item => ({

  propertyUnitType: item.propertyUnitType,

  propertyUnitRate: item.propertyUnitRate

}))

或者

unitsAndRates.map({propertyUnitType, propertyUnitRate} => ({propertyUnitType, propertyUnitRate }))

如果您需要按提交的numberOfUnit进行过滤，请尝试：

const filteredUnits = unitsAndRates.filter(item => item.numberOfUnit === "2000") 

然后你可以做映射

filteredUnits.map({propertyUnitType, propertyUnitRate} => ({propertyUnitType, propertyUnitRate }))