TypeScript--泛型

泛型声明一个方法，同时返回string,number类型问题function getData1(value:string):string{ return value;}function getData2(value:number):number{ return value;}console.log(getData1(‘aa’));console.log(getData2(11));利用any来解决,但是放弃了类型教验function getData(value:any):any{ return value;}console.log(getData(‘aa’));console.log(getData(11));利用泛型function getData<T>(value:T):T{ return value;}console.log(getData<number>(123));console.log(getData<string>(‘aaa’));获取数组最小值未使用泛型要同时实现string,number,要写2个类来实现numberclass MinClass{ public list:number[]=[]; add(num:number){ this.list.push(num); } min():number{ var minNum = this.list[0]; for(var i =0;i<this.list.length;i++){ if(minNum > this.list[i]){ minNum = this.list[i] } } return minNum; }}var m = new MinClass();m.add(1);m.add(6);m.add(2);m.add(11);console.log(m.min());stringclass MinClass{ public list:string[]=[]; add(num:string){ this.list.push(num); } min():string{ var minNum = this.list[0]; for(var i =0;i<this.list.length;i++){ if(minNum > this.list[i]){ minNum = this.list[i] } } return minNum; }}var m = new MinClass();m.add(‘a’);m.add(‘c’);m.add(‘b’);console.log(m.min());泛型一个类，同时实现string,numberclass MinClass<T>{ public list:T[]=[]; add(num:T):void{ this.list.push(num); } min():T{ var minNum = this.list[0]; for(var i =0;i<this.list.length;i++){ if(minNum > this.list[i]){ minNum = this.list[i] } } return minNum; }}var m = new MinClass<number>();m.add(1);m.add(6);m.add(2);m.add(11);console.log(m.min());var s = new MinClass<string>();s.add(‘a’);s.add(‘b’);s.add(‘f’);s.add(’d’);console.log(s.min());