Generics in Typescript allow for creating reusable code that can work with multiple data types without the need for redundant code. The Array constructor is an example of how generics can be implemented in Typescript.
For example, consider a scenario where you want to write a function that takes an array of any data type and returns the sum of all the elements in the array. You can use generics to achieve this:
function sum<T extends number | string>(arr: T[]): number | string {
let result: number | string = 0;
for (let i = 0; i < arr.length; i++) {
result += arr[i];
}
return result;
}
In the above example, the generic type T
extends either number
or string
. This means that you can pass an array of numbers or strings to the function and it will return the sum of all elements in the array.
You can call this function with different types of arrays, for example:
const arr1: number[] = [1, 2, 3];
const arr2: string[] = ['one', 'two', 'three'];
console.log(sum(arr1)); // returns 6
console.log(sum(arr2)); // returns 'onetwothree'
In summary, implementing generics in Typescript allows for creating flexible and reusable code that can work with multiple data types, including arrays using the Array constructor.
Please start posting anonymously - your entry will be published after you log in or create a new account. This space is reserved only for answers. If you would like to engage in a discussion, please instead post a comment under the question or an answer that you would like to discuss
Asked: 2023-04-29 04:22:26 +0000
Seen: 8 times
Last updated: Apr 29 '23
How can one ensure that sub-classes have uniform method parameters in TypeScript?
Can a TypeScript definition for icon names be provided in MaterialCommunityIcons for React Native?
How can TypeScript be used to save a file in an Excel add-in?
What is the Angular Type script NG Zorro event for radio buttons?
What is the process for implementing a Many to Many relationship using NestJs Sequlize and Mysql2?
What is the method for defining a Fixed length Array in TypeScript?
What difficulties are encountered in the installation of react-router-dom using typescript?