Generics of TS

Basic use of generics

// Not clear name Used when the type of 
// The representation defines a generic T, Then pass on the reference name yes T type ,myFun The return value of T type ; When myFun It can only be determined when called T Value 
function myFun<T>(name: T): T {
    
    return name
}

myFun<string>('hellow')//T by string type 
myFun<number>(15)//T by number type 

Generics can specify multiple

function myFun<T, K>(name: T, age: K): T{
    
    return name
}
myFun<string, number>('tt', 18)//T by string type ,K by number type 

Generic binding interface

interface Inter{
    
    length: number
}

//T extends Inter  For generics T Must be Inter Subclasses of 
function myFum<T extends Inter>(value: T): number{
    
    return value.length
}

myFum('abc')//'abc'.length  String has length attribute , accord with Inter The interface specification 
myFum([1,3,9,5,])//[1,3,9,5,].length  Array has length attribute , accord with Inter The interface specification 
myFum({
    length: 5})//{length: 5}.length  The object has length attribute , accord with Inter The interface specification 

Generic binding class

class myClass<T>{
    
    name: T
    constructor(name: T){
    
        this.name = name
    }
}

const my = new myClass<string>('tm')