Typescript with NodeJS

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)PXUPHFUTUBSUFE $ npm install -g typescript $ vim app.ts //
write typescript code $ tsc app.ts $ node app.js

let size: number = 3; let isManagingPartner: boolean = true;
let name: string = "Harvey Specter"; let friends: Array<string> = ['Mike Ross', 'Jessica Pearson', 'Louis Litt’]; size = 'Rachel Zane'; // Type 'string' is not assignable to type 'number'. #BTJD5ZQFT

let foo: any foo = 1; foo = 'one'; foo
= [1] 4QFDJBM5ZQFABOZABMMPXTBOZWBMVFT

let foo = 3; foo = 'three'; // Type 'string'
is not assignable to type 'number'. 5ZQF*OGFSFODF

function authenticate(username: string, password: string): boolean { // some authentication
logic return true; } function authenticate(user: { username: string, password: string }): boolean { // some authentication logic return true; } GVODUJPOQBSBNFUFSTSFUVSOWBMVFT

{ firstName: 'John', lastName: 'Doe', // age is optional fullName:
function() { return this.firstName + ' ' + this.lastName } address: { city: 'Toronto', postalCode: 'M5M M5M' } } *OUFSGBDFT

interface User { firstName: string, lastName: string, age?: number, fullName():
string, address: { city: string, postalCode: string } } *OUFSGBDFT

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Typescript with NodeJS

Typescript with NodeJS

Jasdeep Singh

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5ZQF4DSJQUXJUI/PEF+4 CZ!KBTEFFQTJOHI

*XPSLBU.FUBXBSF-BCT 8FNBLFXFCNPCJMFBQQT

5ZQF4DSJQU+BWBTDSJQUUIBUTDBMFT 4VQFSTFUPG+4UIBUDPNQJMFTEPXOUPQMBJO+4

7BMJE+4 NBZ 7BMJE54

%FWFMPQFECZ.JDSPTPGU

'SFF0QFO4PVSDF #FFOBSPVOETJODF

(BJOJOHUSBDUJPO XFBSFJO+4MBOE

'SJFOETPG5ZQF4DSJQU

&EJUPS*%&4VQQPSU

)PXUPHFUTUBSUFE $ npm install -g typescript $ vim app.ts //

let size: number = 3; let isManagingPartner: boolean = true;

let foo: any foo = 1; foo = 'one'; foo

let foo = 3; foo = 'three'; // Type 'string'

function authenticate(username: string, password: string): boolean { // some authentication

{ firstName: 'John', lastName: 'Doe', // age is optional fullName:

interface User { firstName: string, lastName: string, age?: number, fullName():

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