只需将 typescript 条件表达式转换为三元语句

Question

我有以下if语句。 这个表达式是否可以简化为三元语句？ 我无法弄清楚，因为需要根据coverageLineId的值分配group

let group;
if(coverageLineId == 1)
  group = this.medicalBenefitsGroupsView.find((x) => x.value === groupValue);
else if (coverageLineId == 2)
  group = this.dentalBenefitsGroupsView.find((x) => x.value === groupValue);
else if (coverageLineId == 3)
  group = this.visionBenefitsGroupsView.find((x) => x.value === groupValue);

Answer 1

你可以做类似的事情

let group;

group = coverageLineId == 1 ? this.medicalBenefitsGroupsView.find((x) => x.value === groupValue) :
        coverageLineId == 2 ? this.dentalBenefitsGroupsView.find((x) => x.value === groupValue) :
        coverageLineId == 3 ? this.visionBenefitsGroupsView.find((x) => x.value === groupValue) : undefined;

Answer 2

如果你真的想让它更简洁，你可以这样做：

let group = this[["", "medical", "dental", "vision"][coverageLineId] + "BenefitsGroupsView"].find((x) => x.value === groupValue);

但是，我想我会这样做：

let view;
switch (coverageLineId) {
    case 1:
        view = this.medicalBenefitsGroupsView; break;
    case 2:
        view = this.dentalBenefitsGroupsView; break;
    case 3:
        view = this.visionBenefitsGroupsView; break;
}
let group = view.find((x) => x.value === groupValue);