如何解决打字稿中开关的替代方法
我正在考虑我的开关箱的任何替代方案,因为它很长 我有嵌套的开关盒,看起来像这样
switch (currentTab) {
case pending:
switch (status) {
case approved:
case denied:
break;
case partialApproved:
finalUpdatedInvoiceAmount = updatedInvoiceAmount - (feeAmount - (approvedFeeAmount || 0));
break;
}
break;
case approved:
switch (status) {
case denied:
case partialApproved:
finalUpdatedInvoiceAmount = updatedInvoiceAmount - (feeAmount - (approvedFeeAmount || 0));
break;
}
break;
case denied:
switch (status) {
case approved:
case partialApproved:
finalUpdatedInvoiceAmount = oldApprovedFeeAmount ? updatedInvoiceAmount + (feeAmount - oldApprovedFeeAmount) : updatedInvoiceAmount - (feeAmount - (approvedFeeAmount || 0));
break;
}
break;
case partiallyApprovedTab:
switch (status) {
case approved:
case denied:
case partialApproved:
finalUpdatedInvoiceAmount = oldApprovedFeeAmount ? updatedInvoiceAmount + (feeAmount - oldApprovedFeeAmount) : updatedInvoiceAmount - (feeAmount - (approvedFeeAmount || 0));
break;
}
break;
}
这是另一种可能性吗? 由于代码非常庞大,以后可能会出现其他情况。
解决方法
也许你可以试试handlerMap:
const handler1 = () => { finalUpdatedInvoiceAmount = updatedInvoiceAmount - (feeAmount - (approvedFeeAmount || 0)); }
const handler2 = () => { finalUpdatedInvoiceAmount = oldApprovedFeeAmount ? updatedInvoiceAmount + (feeAmount - oldApprovedFeeAmount) : updatedInvoiceAmount - (feeAmount - (approvedFeeAmount || 0)); }
const handlerMap = {
[pending]: {
[partialApproved]: handler1
},[approved]: {
[denied]: handler1,[partialApproved]: handler1,},[denied]: {
[approved]: handler2,[partialApproved]: handler2,[partiallyApprovedTab]: {
[approved]: handler2,[denied]: handler2,}
}
handlerMap[currentTab] && handlerMap[currentTab][status] && handlerMap[currentTab][status]()
// handlerMap[currentTab]?.[status]?.()
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