Declare an array in TypeScript

Here are the different ways in which you can create an array of booleans in typescript:

let arr1: boolean[] = [];let arr2: boolean[] = new Array();let arr3: boolean[] = Array();let arr4: Array<boolean> = [];let arr5: Array<boolean> = new Array();let arr6: Array<boolean> = Array();let arr7 = [] as boolean[];let arr8 = new Array() as Array<boolean>;let arr9 = Array() as boolean[];let arr10 = <boolean[]> [];let arr11 = <Array<boolean>> new Array();let arr12 = <boolean[]> Array();let arr13 = new Array<boolean>();let arr14 = Array<boolean>();

You can access them using the index:

console.log(arr[5]);

and you add elements using push:

arr.push(true);

When creating the array you can supply the initial values:

let arr1: boolean[] = [true, false];let arr2: boolean[] = new Array(true, false);

this is how you can create an array of boolean in TS and initialize it with false:

var array: boolean[] = [false, false, false]

or another approach can be:

var array2: Array<boolean> =[false, false, false] 

you can specify the type after the colon which in this case is boolean array

Specific type of array in typescript

export class RegisterFormComponent {     genders = new Array<GenderType>();   // Use any array supports different kind objects     loadGenders()     {        this.genders.push({name: "Male",isoCode: 1});        this.genders.push({name: "FeMale",isoCode: 2});     }}type GenderType = { name: string, isoCode: number };    // Specified format