is the following code generic?
export default interface IField<I = object, O = I> {
set(value: I): void;
get(): O;
} Why is it written I = object ?
is the following code generic?
export default interface IField<I = object, O = I> {
set(value: I): void;
get(): O;
} Why is it written I = object ?
default type, if there is an I type defined, that type is I, if there is no definition, the type is object.
interface Card {
name: string
age: number
}
interface IField<I = Card, O = I> {
set(value: I): void;
get(): O;
}
// I,OI
const map: IField<string, number> = {
set(value: string) { },
get: () => 1,
}
// extends ,
interface List<I extends Card, O extends I> {
set(value: I): void;
get(): O;
}
// I Card
// const myList: List<Date, Date> = {
const myList: List<Card, Card> = {
set(value: Card) { },
get: () => {
return {
name: 'xiaoming',
age: 15
}
},
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