如何在Angular 8中映射两个数组

玛格琳

我有两个数组partyCtx和planList

partyCtx看起来像这样：

partyCtx: Array(5)
0: {planCode: "PLN00062", planShortName: "Federal Home Loan Bank of A", employerPartyID: "", employerShortName: "", hasPayrollCenter: false, …}
1: {planCode: "PLN00125", planShortName: "Federal Home Loan Bank of B", employerPartyID: "", employerShortName: "", hasPayrollCenter: false, …}
2: {planCode: "PLN01633", planShortName: "Federal Home Loan Bank of C", employerPartyID: "", employerShortName: "", hasPayrollCenter: false, …}
3: {planCode: "PLN01819", planShortName: "Federal Home Loan Bank of D", employerPartyID: "", employerShortName: "", hasPayrollCenter: false, …}
4: {planCode: "PLN06806", planShortName: "Federal Home Loan Bank of E", employerPartyID: "", employerShortName: "", hasPayrollCenter: true, …}
length: 5

planList看起来像这样

planList: Array(2)
0: "PLN06806"
1: "PLN00125"
length: 2

现在我需要一个数组，您可以在其中选择计划清单并从partyctx进行过滤/映射，因此它看起来应该像

result: Array(2)
0: {planCode: "PLN06806", planShortName: "Federal Home Loan Bank of E"}
1: {planCode: "PLN00125", planShortName: "Federal Home Loan Bank of B"}
length: 2

我如何获得结果数组？

布莱恩60

只需过滤并映射它：

const result = partyCtx.filter(p => planList.includes(p.planCode)) // filter on items with planCode in planList
        .map(({planCode, planShortName})  => ({planCode, planShortName})) // map to planCode and planShortName

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