pnutmath

import { Component, HostListener } from '@angular/core';

@Component({
  selector: 'app-root',
  template: '<button (click)="addToHomeScreen()" *ngIf="showButton">Add to Home Scree</button>',
  styleUrls: ['./app.component.scss']
})
export class AppComponent {

  deferredPrompt: any;

ThomasBurleson

Quite simply, because Observables can encapsulate many different types of sources and those sources don't necessarily have to obey that interface. Some like Promises always attempt to eagerly compete.

Consider:

const promise = $.get('https://www.google.com');

Toilal

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { JWT_OPTIONS, JwtInterceptor, JwtModule } from '@auth0/angular-jwt';
import { AuthorizationService } from './authorization.service';
import { environment } from '../../environments/environment';
import { HTTP_INTERCEPTORS, HttpClientModule } from '@angular/common/http';
import { RefreshTokenInterceptor } from './refresh-token-interceptor';

function jwtOptionsFactory (authorizationService: AuthorizationService) {
  return {

jpswade

Find the original here article here: Devops Best Practices

DevOps started out as "Agile Systems Administration". In 2008, at the Agile Conference in Toronto, Andrew Shafer posted an offer to moderate an ad hoc "Birds of a Feather" meeting to discuss the topic of "Agile Infrastructure". Only one person showed up to discuss the topic: Patrick Debois. Their discussions and sharing of ideas with others advanced the concept of "agile systems administration". Debois and Shafer formed an Agile Systems Administrator group on Google, with limited success. Patrick Debois did a presentation called "Infrastructure and Operations" addressing

Tuizi

import { Action, ActionReducer, Store } from '@ngrx/store';
import { BehaviorSubject } from 'rxjs/BehaviorSubject';
import { Observable } from 'rxjs/Observable';
import { map } from 'rxjs/operator/map';
import { Observer } from 'rxjs/Observer';

// TODO: How to initialize those variables?
const dispatcherMock: Observer<Action>,
    reducerMock: Observer<ActionReducer<any>>,
    stateMock: Observable<any>;

singledigit

AWSTemplateFormatVersion: '2010-09-09'
Description: Cognito Stack
Parameters:
  AuthName:
    Type: String
    Description: Unique Auth Name for Cognito Resources

Resources:
  # Creates a role that allows Cognito to send SNS messages
  SNSRole:

TomDunn

BUCKET="!!!!!!!!YOUR_AMAZON_S3_BUCKET_NAME_HERE!!!!!!!!!!"
CONTENT_TYPE="application/zip"
DATE=`date -R`
IN_FILE="revision.zip"
KEY="demo/revision.zip"
RESOURCE="/${BUCKET}/${KEY}"
HMAC="PUT\n\n${CONTENT_TYPE}\n${DATE}\n${RESOURCE}"

zip -r --exclude=*.git* "$IN_FILE" .

Quramy

Performance of unit testing Angular app

I'm loving Angular, but running unit tests on Karma gets my nerves. It's too slow for me.

In this post, I explain mechanics under Angular's testing module and how to improve the performance.

What makes my tests slow?

To evaluate Angular unit testing performance I captured the CPU profiling with running Karma.

ajcrites

https://medium.com/@ExplosionPills/rxjs-switch-switchmap-and-other-map-operations-e8ccdfb7e5a9 is more up-to-date.

Exploring RxJS still feels like a jungle to me. Even when I think I understand something, I find out that I actually don't understand it. In my quest to truly understand it, I end up learning quite a lot more about some other topics or operations than the one I was originally trying to understand. This is generally a positive thing, but it still feels like traveling deep into a jungle to me.

Just today I was trying to learn how to use ngrx/store with ngrx/effects to use http requests with an ngrx/store-backed app. This introduced me to the RxJS Observable switchMap operator that I was not familiar with. The main question I came up with -- the question that I usually have when

vespertilian

  @Effect()
  selectAndLoadStore$: Observable<Action> = this.actions$
    .ofType(storeActions.SELECT_AND_LOAD_STORE)
    .withLatestFrom(this.store.select(ngrx.storeState))
    .map(([action, storeState]) => [action.payload, storeState])
    .switchMap(([storeName, storeState]) => {
      const existsInStore = Boolean(storeState.urlNameMap[storeName]);
      return Observable.if(
        () => existsInStore,
        Observable.of(new storeActions.SetSelectedStore(storeName)),