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View transaction-example.ts
@Post('money/transfer')
async transferMoney(@Body() dto: TransferMoneyDto) {
// Start session using mongo connection
const session = await this.mongoConnection.startSession();
// Start transaction using the session
session.startTransaction();
try {
// This method will do a few mongo db operations
const result = await this.transferMoneyService.transfer(dto, session);
View azure-service-bus.ts
import { Injectable } from '@nestjs/common';
import { ReceiveMode, ServiceBusClient } from '@azure/service-bus';
@Injectable()
export class ServiceBusService {
constructor() {
this.init();
}
async init() {
View reduxjs-toolkit-example.ts
import { createSlice, PayloadAction } from '@reduxjs/toolkit';
import { UserProfileApi, UserSettingsApi } from '@selfplat/api-model';
import { AppThunk } from '../root.store';
import { ProfileService } from './profile.service';
export interface UserState {
profile: UserProfileApi;
settings: UserSettingsApi;
}
View theme.ts
const theme = {
breakpoints: ['30em', '48em', '62em', '80em'],
zIndices: {
hide: -1,
auto: 'auto',
base: 0,
docked: 10,
dropdown: 1000,
sticky: 1100,
banner: 1200,
View palindrom.js
//Make the following test cases pass
function isPalindrome(phrase) {
const SPACE = " ";
const lowerCharsInPhrase = phrase
.toLowerCase()
.split("")
.filter(char => char !== SPACE);
return lowerCharsInPhrase.join() === lowerCharsInPhrase.reverse().join();
}
View optional-operator.ts
const maybePerson = getPerson();
console.log(maybePerson?.name);
console.log(maybePerson?.name?.firstName);
console.log(maybePerson?.name?.lastName);
console.log(maybePerson?.name?.getFullName?.());
View handle-with-if.ts
const maybePerson = getPerson();
if (maybePerson) {
console.log(maybePerson.name);
}
if (maybePerson && maybePerson.name) {
console.log(maybePerson.name.firstName);
console.log(maybePerson.name.lastName);
}
View getPerson.ts
function getRandomNumber() {
return Math.floor(Math.random() * 100);
}
function isEvenNumber(number: number) {
return number % 2 == 0;
}
function getPerson() {
if (isEvenNumber(getRandomNumber())) {
View unsubscribe-02.ts
export class AppComponent implements OnInit, OnDestroy {
@Selector(CustomersState.SelectedCustomer)
private selectedCustomer$: Observable<Customer>;
@Selector(OrdersState.NewOrder)
private newOrder$: Observable<Order>;
private onComponentDestroy$: Subject<void>;
constructor() {
View unsubscribe-01.ts
import { Component, OnDestroy, OnInit } from '@angular/core';
import { Observable, Subscription } from 'rxjs';
export class RxJSUtil {
static unsubscribe = (subscriptions: Subscription[]) =>
subscriptions.forEach(subscription => subscription.unsubscribe());
}
@Component({
selector: 'nx-tutorial-root',
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