TYPESCRIPT

generic in typescript

/*
What are Generics?
Generics have been a major feature of strongly typed languages 
like Java and C#. In TypeScript, they allow the types of components 
and functions to be "SPECIFIED LATER" which allows them to be used 
in creating reusable components that can apply to different use cases, 

for example:
*/

function returnInput <Type>(arg: Type): Type {
  return arg;
};
const returnInputStr = returnInput<string>('Foo Bar');
const returnInputNum = returnInput<number>(5);

console.log(returnInputStr); // Foo Bar
console.log(returnInputNum); // 5

typescript generic function

function firstElement<Type>(arr: Type[]): Type {
  return arr[0];
}
// s is of type 'string'
const s = firstElement(["a", "b", "c"]);
// n is of type 'number'
const n = firstElement([1, 2, 3]);

Typescript Basic Generics

   function identity<T>(arg: T): T {
      return arg;
    }


let fun = identity<string>("hello");
console.log(fun);   

/*T is shorthand for Type, meaning "you can specify the data type later"*/

generic typescript

class Greeter<T> {
  greeting: T
  constructor(message: T) {
    this.greeting = message
  }
}

let greeter = new Greeter<string>('Hello, world')

typescript generic type

function identity<T>(arg: T): T {
  return arg;
}Try

generic function typescript

const valueWrapper = <T>(value: T): T[] => {
  return [value];
};

console.log(valueWrapper<number>(10));