How to integrate RxJava into Android App with examples

In this tutorial, grokonez.com shows you way to integrate RxJava 2 into Android App, along with 3 simple examples that apply RxJava:

  • CompoundButton (Switch) updates TextView
  • Update TextView when text length in EditText changes
  • Reactive Text search

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Display Data in Angular (6,7,8) Tutorial with Examples

In the tutorial, Grokonez.com will introduce how to display data in Angular by examples:

  • Display data using Interpolation
  • Show array items with *ngFor
  • Model Data by TypeScript class and display its properties
  • Using *ngIf to insert or remove an element by on boolean expression

Related posts:
– Angular Tutorial
– Angular built-in Slice Pipe | Array SlicePipe + String SlicePipe Example

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How to Integrate Angular 8 and SpringBoot RestAPIs Example

In the tutorial, we show you how to integrate Angular 8 with SpringBoot RestAPI for development using SpringToolSuite IDE.

  • Setup Nodejs and Angular CLI
  • Create simple Springboot RestAPIs
  • Setup Angular 8 project
  • Import Angular 8 to SpringToolSuite
  • Integrate SpringBoot RestAPI with Angular 8

Related posts:

– Angular Tutorial.
– Spring Boot + Angular 6 example | Spring Data + REST + MongoDb CRUD example

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How to integrate RxJS with Vue using Vue-Rx plugin

In this tutorial, grokonez.com will show you way to integrate RxJS with Vue using Vue-Rx plugin.

Related Post: Introduction to RxJS – Extensions for JavaScript Reactive Streams

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How to use ArrayList in Java with Example Programs

Java ArrayList is a dynamic array with resizable-array implementation of Java List interface. In the tutorial, we will learn how to use Java ArrayList by examples:

  • What is Java ArrayList?
  • How to construct a Java ArrayList?
  • Do a Set Operations with Java ArrayList
  • How to Sort Java ArrayList?
  • Use Java ArrayList with Multi-Thread Environment

Related posts:
– How to use Java Stack with Examples
– How to use Java PriorityQueue with Examples

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How to use Java Stack with Examples

In the tutorial, Grokonez will introduce how to use Java Stack with Examples:

  • How does Java Stack work?
  • Hierarchy of Java Stack
  • Do push, pop, peek, search operations with Java Stack data structure

Related posts:
– How to use Java PriorityQueue with Examples
– How to use Java TreeMap with Examples

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How to use Java PriorityQueue with Examples

In the tutorial, Grokonez introduces how to work with Java PriorityQueue by examples:

  • How does Java PriorityQueue work?
  • Explore Java PriorityQueue Hierarchy
  • Create Java PriorityQueue with Integer, String, and Custom Object Class

Related posts:
– Java TreeMap with Examples

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Angular 8 – Upload/Display/Delete files to/from Firebase Storage using @angular/fire

In this tutorial, grokonez.com shows you way to upload, get, delete Files to/from Firebase Storage in a simple Angular 8 App using @angular/fire. Files’ info will be stored in Firebase Realtime Database.

Related Posts:
– Angular 8 Firebase tutorial: Integrate Firebase into Angular 8 App with @angular/fire
– Angular 8 Firebase CRUD operations with @angular/fire
– Angular 8 Firestore tutorial with CRUD application example – @angular/fire

Want to know to to deploy Angular App on Hostings?
>> Please visit this Series (with Instructional Videos)

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How to use Java TreeMap with Examples


In the tutorial, Grokonez introduces about Java TreeMap and how to use it by examples:
– Explore Java TreeMap’s hierarchy.
– Do examples with Java TreeMap method APIs

Let’s start with more details!

Related posts:
– How to use Java PriorityQueue with Examples

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Angular 8 Firestore tutorial with CRUD application example – @angular/fire

Cloud Firestore helps us store data in the cloud. It supports offline mode so our app will work fine (write, read, listen to, and query data) whether device has internet connection or not, it automatically fetches changes from our database to Firebase Server. We can structure data in our ways to improve querying and fetching capabilities. This tutorial shows you how to work with Firebase Firestore along with an Angular app that can do CRUD Operations.

Related Posts:
– Angular 8 Firebase tutorial: Integrate Firebase into Angular 8 App with @angular/fire
– Angular 8 Firebase CRUD operations with @angular/fire
– Angular 8 – Upload/Display/Delete files to/from Firebase Storage using @angular/fire

[Continue reading…] “Angular 8 Firestore tutorial with CRUD application example – @angular/fire”