typescript this keyword typing code example

Example 1: typescript type definition

// cannot use object for type defination because this is not recommended
// use Record<string, any> this same with object

const name: string = "john doe"
const age: number = 30

const days1: string[] = ["sunday","monday","thuesday","wenesday"]
const numb1: number[] = [1,2,3,4,5]

const days2: Array<string> = ["sunday","monday","thuesday","wenesday"]
const numb2: Array<number> = [1,2,3,4,5]

const person: Record<string, any> = {
	name: "john doe",
	age: 30
}

async function name(): Promise<string> {
	return "john doe"
}

name().then(console.log)

async function str(): Promise<string[]> {
	return ["sunday","monday","thuesday","wenesday"]
}

str().then(console.log)

async function int(): Promise<int[]> {
	return [1,2,3,4,5]
}

int().then(console.log)

async function objectValue(): Promise<Record<string, any>> {
	const person: Record<string, any> = {
	 name: "john doe",
	 age: 30
	}
  return person
}

objectValue().then(console.log)

async function objectValueMulti(): Promise<Record<string, any>[]> {
	const person: Record<string, any>[] = [{
	 name: "john doe",
	 age: 30
	},{
	 name: "jane doe",
	 age: 30
	}]
  return person
}

objectValueMulti().then(console.log)

Example 2: typing in typescript

var name: string = "Anna";
let notes: (number | string)[] = ["Get Food", 23, "Call the previous number when betting"];