TypeScript 泛型

泛型示例

class Type<T>{
    name: T
    salary: number
    constructor(name: T,salary: number) {
        this.name = name
        this.salary =salary
    }
    set MyName(n: T){
        this.name = n
    }
    get MyName(){
        return this.name
    }
}

const type1 = new Type<number>(1, 2)
const type2 = new Type<string>('hedon', 2)

约束泛型

interface HasWeight {
    weight:number
}

// T 必须有 HasWeight 中有的属性
class MyArray<T extends HasWeight> {
    data: T[] = []
    add(t: T){
        this.data.push(t)
    }
    map<U>(f: (v:T) => U): U[] {
        return this.data.map(f)
    }
    print(){
        console.log(this.data)
    }
    sortByWeight(){
        this.data.sort((a, b) => a.weight - b.weight)
    }
}