如何在 Typescript 中撰寫此串列?我知道代碼在 TypeScript 中有效,但我希望串列具有宣告性型別。它目前在 Javascript 中,它是汽車串列:
const list_of_cars = [{
type: "Toyota",
model: "Corolla",
year: 2009
},
type: "Ford",
model: "Mustang",
year: 1969
}];
我知道試過const car: { type: string, model: string, year: number } =
uj5u.com熱心網友回復:
通常,您可以為特定物件定義型別或介面,并為每個屬性指定單獨的型別。然后,您可以將串列定義為您定義的特定介面或型別的陣列。
例子:
interface Car {
type: string
model: string
year: number
}
const listOfCars: Car[] = [{
type: "Toyota",
model: "Corolla",
year: 2009
},
type: "Ford",
model: "Mustang",
year: 1969
}];
uj5u.com熱心網友回復:
這在打字稿中也是有效的。如果你想要型別,那么你可以這樣寫
const list_of_cars:{type:string, model:string,year:number}[] = [{
type: "Toyota",
model: "Corolla",
year: 2009
},{
type: "Ford",
model: "Mustang",
year: 1969
}];
或者你可以宣告一個型別并使用它
type car={type:string, model:string,year:number}
const list_of_cars : car[] = [{
type: "Toyota",
model: "Corolla",
year: 2009
},{
type: "Ford",
model: "Mustang",
year: 1969
}];
uj5u.com熱心網友回復:
在我們最嚴格的作業倉庫之一中,我們在陣列容器上宣告顯式型別,如果您有興趣看到它以專業的方式組織,它看起來像這樣:
interface CarType {
type: string
model: string
year: number
}
type CarsType = CarType[]
const list_of_cars: CarsType = [
{ type: 'Toyota', model: 'Corolla', year: 2009 },
{ type: 'Ford', model: 'Mustang', year: 1969 },
]
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標籤:javascript 打字稿
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