操纵javascript对象数组以获得一组新的对象数组
我有这个对象数组操纵javascript对象数组以获得一组新的对象数组,javascript,arrays,object,Javascript,Arrays,Object,我有这个对象数组 const unitsAndRates = [ { propertyUnitType: "store", propertyUnitRate: "20000", numberOfUnit: 4 }, { propertyUnitType: "duplex", propertyUnitRate: "20000", numberOfUnit: 3
const unitsAndRates = [
{
propertyUnitType: "store",
propertyUnitRate: "20000",
numberOfUnit: 4
},
{
propertyUnitType: "duplex",
propertyUnitRate: "20000",
numberOfUnit: 3
}
];
我需要类似于上面生成的数组的东西
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
numberOfUnit
,如何生成上述输出?这可以使用Array.prototype.flatMap
完成
const unitsAndRates=[
{
propertyUnitType:“存储”,
地产硝酸盐:“20000”,
人数单位:4
},
{
propertyUnitType:“双面打印”,
地产硝酸盐:“20000”,
人数单位:3
}
];
const result=unitsAndRates.flatMap((项)=>[…数组(项.numberOfUnit.keys()])。map((索引)=>({
propertyUnitType:item.propertyUnitType+(索引+1),
propertyUnitRate:item.propertyUnitRate
})));
控制台日志(结果)代码>这可以使用Array.prototype.flatMap
完成
const unitsAndRates=[
{
propertyUnitType:“存储”,
地产硝酸盐:“20000”,
人数单位:4
},
{
propertyUnitType:“双面打印”,
地产硝酸盐:“20000”,
人数单位:3
}
];
const result=unitsAndRates.flatMap((项)=>[…数组(项.numberOfUnit.keys()])。map((索引)=>({
propertyUnitType:item.propertyUnitType+(索引+1),
propertyUnitRate:item.propertyUnitRate
})));
控制台日志(结果)代码>
或
如果需要按numberOfUnit字段进行筛选,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 }))
或
如果需要按numberOfUnit字段进行筛选,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 }))
复制的规则是什么?你尝试了什么?复制的规则是什么?你尝试了什么?非常感谢@Derek。成功了。非常感谢@Derek。工作。